Texas Instruments DEM-PCM2912A EVM User's Manual
Contents
1. TQFP 36 Name Terminal UO Description Vccr 21 Se Analog power supply for headphone amplifier of R channel VoutR 22 O Headphone output for R channel MAMP 23 l po preamplifier gain control LOW Preamplifier off HIGH Preamplifier on 20 POWER 24 l Power consumption declaration select pin LOW 100 mA HIGH 500 mA PGND 25 Analog ground for microphone bias microphone amplifier and PGA VccP 26 Analog power supply for PLL TEST1 27 l Test pin Must be set to high TESTO 28 l Test pin Must be set to low SSPND 29 O Suspend flag LOW Suspend HIGH Operational state MMUTE 30 l Microphone mute control active high LOW Mute off HIGH Mute on REC 31 O Status output for record LOW Record FLASH Mute on record HIGH Stop PLAY 32 O Status output for playback LOW Playback FLASH Mute on playback HIGH Stop 12 Description SBAU141 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Functional Block Diagram 1 3 Functional Block Diagram Figure 1 2 illustrates the functional block diagram of the DEM PCM2912A EVM BGND Voca Vcoe cot Voca VoD AGND HGND PGND DGND Power 5 Vto 3 3 V Manager SSPND gt Voltage Regulator 1 1 Vaus MBIAS PGA 30 dB to 12 dB D in 1 dB steps ISO2. Analog Analyzer A A Headphone Left ch USB Connector Right ch Ll ga ik PCM2912A EVM Figure 4 1 DEM PCM2912A EVM Configuration for Playback Performance Measurement 34 Evaluation and Measurements SBAU141 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Playback Performance Table 4 1 Line Output Playback Performance Power Supply Performance Filter Setting RL VourL VoutR 5 0 V THD N 0 dBFS at 400 Hz to 20 kHz 10 ko 0 008696 0 008596 1 kHz Pre Anlr SNR BPZ input 400 Hz to 20 kHz 10 kQ 92 1 dB 92 1 dB Pre Anlr A weighting DR 60 dBFS 400 Hz to 20 kHz 10 kQ 90 3 dB 90 5 dB input Pre Anlr A weighting Channel Separation 400 Hz to 20 kHz 10 KQ 89 3 dB 89 3 dB BPZ input for target Pre Anlr channel Table 4 2 32 O Headphone Output Playback Performance Power Supply Performance Filter Setting RL VourL VoutR 5 0 V THD N 0 dBFS at 400 Hz to 20 kHz 320 0 026 0 025 1 kHz Pre Anlr SNR BPZ input 400 Hz to 20 kHz 320 92 1 dB 92 1 dB Pre Anlr A weighting DR 60 dBFS 400 Hz to 20 kHz 320 89 4 dB 89 4 dB input Pre Anlr A weighting Table 4 3 16 Q Headphone Output Playback Performance Power Supply Performance Filter Setting RL VourL VoutR 5 0 V THD N 0 dBFS at 400 Hz to 20 kHz 16 Q 0 04496 0 04296 1 kHz Pre Anlr SNR BPZ input 400 Hz to 20 kHz 160 92 1 dB 92 1 dB Pre Anlr A weighti
3. A USB Connector S PDIF Output Audio Precision SYS 2722 Digital Analyzer Figure 4 3 DEM PCM2704EVM Configuration for Recording Performance Measurement with Recorded Data Table 4 4 Line Input Recording Performance Power Supply Performance Filter Setting DOUT 5 0 V THD N 1 dB at 1 kHz 400 Hz to 20 kHz LP 0 008 SNR BPZ input 400 Hz to 20 kHz LP 92 5 dB A weighting DR 60 dB input 400 Hz to 20 kHz LP 90 5 dB A weighting 36 Evaluation and Measurements SBAU144 January 2009 Submit Documentation Feedback 13 TEXAS Chapter 5 INSTRUMENTS SBAU141 January 2009 Schematic PCB Layout and Bill of Materials This chapter provides the electrical and physical layout information for the DEM PCM2912A EVM The bill of materials is included for component and manufacturer reference Note Board layouts are not to scale These are intended to show how the board is laid out they are not intended to be used for manufacturing DEM PCM2912A EVM PCBs Topic Page ane WEE TEE 38 5 2 Printed Circuit Board Layout EE 39 53 Component DIE ee 40 SBAU141 January 2009 Schematic PCB Layout and Bill of Materials 37 Submit Documentation Feedback TA TEXAS INSTRUMENTS Schematics www ti com 5 1 Schematics The schematic for the DEM PCM2912A EVM is shown in Figure 5 1 8 os 8 Ca qr gh peas Figure 5 1 DEM PCM2912A EVM Sche
4. Check pin Mac8 HK 6 S TP6 TP11 SBAU144 January 2009 Submit Documentation Feedback Schematic PCB Layout and Bill of Materials 41 EVALUATION BOARD KIT IMPORTANT NOTICE Texas Instruments TI provides the enclosed product s under the following conditions This evaluation board kit is intended for use for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use Persons handling the product s must have electronics training and observe good engineering practice standards As such the goods being provided are not intended to be complete in terms of required design marketing and or manufacturing related protective considerations including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards This evaluation board kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility restricted substances RoHS recycling WEEE FCC CE or UL and therefore may not meet the technical requirements of these directives or other related directives Should this evaluation board kit not meet the specifications indicated in the User s Guide the board kit may be returned within 30 days from the date of delivery for a full refund THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN
5. Push Volume button to open Microphone window for microphone volume controls gt MIDI music playba wis Default device m Microsoft GS Wavetable SW Synth x Volume About Use only default devices Cancel Apply Figure 3 10 Sound and Audio Devices Properties Audio Tab Windows XP SBAU141 January 2009 Set Up Guide 25 Submit Documentation Feedback JA TEXAS INSTRUMENTS Basic Operating Set Up Windows XP www ti com 3 Set the microphone volume and the recording mute level from 12 dB to 30 dB as shown in Figure 3 11 The initial volume setting upon installation is approximately 8 dB GEES xi Options Help Microphone Balance We bw Set the volume and mute for recording Mute JSB audio CODEC Figure 3 11 Microphone Volume Windows for Record Volume Setting Windows XP After this process is complete the system volume setting for each component is maintained even if EVM is plugged in out 26 Set Up Guide SBAU141 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Basic Operating Set Up Mac OS 3 3 Basic Operating Set Up Mac OS This section reviews how to set up the DEM PCM2912A EVM for use with a Macintosh computer equipped with the Mac OS X or later operating system When the installation is complete the EVM software is ready to use 3 3 1 Basic Setup Before Evaluation Follow these steps to set up the DEM P
6. 1 INSTRUMENTS SBAU141 January 2009 Description The DEM PCM2912A EVM is a complete evaluation platform for the 16 bit mono microphone input and stereo headphone output PCM2912A bus powered audio codec with a USB interface All necessary connectors and circuitry are provided for interfacing to audio test systems and commercial audio equipment A USB connector is mounted on the DEM PCM2912A EVM Stereo audio output and mono audio input are available on two stereo mini jacks Topic Page 1 1 Introduction PCM2912A 7o A 10 1 2 Pin Assignments and Terminal Functions 11 1 3 Functional Block Diagram cence ee eee eee eens tees eens es 13 SBAU141 January 2009 Description 9 Submit Documentation Feedback I TEXAS INSTRUMENTS Introduction PCM2912A www ti com 1 1 10 Introduction PCM2912A The PCM2912A is an audio codec with a USB interface for a USB headset USB headphones and a USB audio interface box that integrates mono input stereo headphone output an analog loopback line a programmable gain amplifier PGA and microphone bias It is available in a 32 pin TQFP package The DEM PCM2912A EVM also carries the Microsoft Windows Logo License certification from the Microsoft Windows Hardware Quality Labs WHQL The DEM PCM2912A has successfully passed the Microsoft WLP test DTM Audio for Windows Vista x86 x64 platforms Key Features Major features of the PCM2912A i
7. Panel Step 3 Select the playback tab and confirm the USB audio codec appearance as the default playback device as shown in Figure 3 1 Step 4 Select the recording tab and confirm the USB audio codec appearance as the default recording device as shown in Figure 3 2 Playback Recording Sounds Playback Recording Sounds Select a playback device below to modify its settings Select a recording device below to modify its settings Microphone High Definition Audio Device v Microphone i i Us o CODEC i Confirm selection of USB audio codec on Playback tab Confirm selection of USB audio codec on Recording tab Configure D Properties Configure Set Default Properties L tze Cancel App Cancel App Figure 3 1 Sound Playback Tab Figure 3 2 Sound Recording Tab Windows Vista Windows Vista 18 Set Up Guide SBAU141 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Basic Operating Set Up Windows Vista 3 1 2 Volume and Mute Settings Follow these steps to configure the volume settings for headphones microphone and the recording options To set the headphone volume Step 1 Open the Sound options from the Control Panel Start Control Panel Sound Step 2 Open the speaker properties of the USB audio codec from the Sound options and select the Levels tab as Figure 3 3 illustrates Step 3 Set the output volume mute a
8. TQFP Visas Vcowt FR FL XTO N XTI 6 o a iC SD D oz gt a BGND Figure 1 1 PCM2912A Pin Assignments Table 1 1 PCM2912A Terminal Functions TQFP 36 Name Terminal UO Description BGND 1 Reference for internal regulator Vous 2 Connect to USB power Vous D 3 1 0 USB differential input output minus D 4 VO USB differential input output plus Von 5 Digital power supply DGND 6 Digital ground XTO 7 O Crystal oscillator output XTI 8 l Crystal oscillator input FL 9 External filter pin of left channel optional FR 10 External filter pin of right channel optional VcoMt 11 Common voltage for ADC DAC and analog front end Vcca 2 Decoupling capacitor should be connected to AGND Vcowe 12 Common voltage for headphone Vcc4 2 Decoupling capacitor should be connected to AGND AGND 13 Analog ground NC 14 Not connected Voca 15 Analog power supply VIN 16 l ADC microphone input MBIAS 17 O Microphone bias output 0 75 Veca VourL 18 O Headphone output for L channel VccL 19 Analog power supply for headphone amplifier of L channel HGND 20 E Analog ground for headphone amplifier SBAU1441 January 2009 Submit Documentation Feedback Description 11 Pin Assignments and Terminal Functions JA TEXAS INSTRUMENTS www ti com Table 1 1 PCM2912A Terminal Functions continued
9. com 3 1 3 Sampling Frequency Under the Windows Vista operating system it is necessary to select a specific sampling frequency Basic Operating Set Up Windows Vista because the sampling frequency cannot be changed on nearly all application software To set the DAC sampling frequency 1 Open the Sound options from the Control Panel Start2 Control Panel Sound 2 Open the speaker properties of the USB audio codec from the Sound options and select the Advanced tab as Figure 3 5 illustrates 3 Select the desired DAC sampling frequency from seven options 8 kHz 11 025 kHz 16 kHz 22 5 kHz 32 kHz 44 1 kHz and 48 kHz General Levels Enhancements Advanced Default Format Select the sample rate and bit depth to be used when running in shared mode 16 bit 44100 H D Quality x 16 bit 8000 Hz Telephone Quality 16 bit 11025 Hz Dictation Quality E16 bit 16000 Hz Tape Recorder Quality 16 bit 22050 Hz AM Radio Quality 16 bit 32000 Hz FM Radio Quali 6 bit 48000 Hz DVD Quality Select DAC sampling frequency Figure 3 5 Speakers Properties Advanced Tab Windows Vista SBAU141 January 2009 Submit Documentation Feedback Set Up Guide 21 Basic Operating Set Up Windows Vista 22 To set the ADC sampling frequency 1 Open the Sound options from the Control Panel Start Control Panel Sound 2 Open the microphone properties of the USB audio codec from the Sou
10. operation some circuit components may have case temperatures greater than 60 C The EVM is designed to operate properly with certain components above 60 C as long as the input and output ranges are maintained These components include but are not limited to linear regulators switching transistors pass transistors and current sense resistors These types of devices can be identified using the EVM schematic located in the EVM User s Guide When placing measurement probes near these devices during operation please be aware that these devices may be very warm to the touch Mailing Address Texas Instruments Post Office Box 655308 Dallas Texas 75265 Copyright 2009 Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries Tl reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Tl s terms and conditions of sale supplied at the time of order acknowledgment TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are used to the extent TI deems necessary
11. revision that is current at the time of the writing of this User s Guide Newer revisions may be available from the TI web site at http www ti com or call the Texas Instruments Literature Response Center at 800 477 8924 or the Product Information Center at 972 644 5580 When ordering identify the document s by both title and literature number Data Sheet Literature Number PCM2912A Product data sheet SLES230 If You Need Assistance If you have questions regarding either the use of this evaluation module or the information contained in the accompanying documentation please contact the Texas Instruments Product Information Center at 972 644 5580 or visit the Tl web site at www ti com FCC Warning This equipment is intended for use in a laboratory test environment only It generates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other environments may cause interference with radio communications in which case the user at his own expense is required to take whatever measures may be required to correct this interference Trademarks All trademarks are the property of their respective owners 8 Read This First SBAU141 January 2009 Submit Documentation Feedback IA TEXAS Chapter
12. sis nnne emen nnne nnne 35 4 4 Line Input Recording Performance EEN 36 5 1 seii 25 cret sereine een e c sceau ai atecd ale ieageeaie E Ceci 40 SBAU141 January 2009 List of Tables 5 Submit Documentation Feedback 6 List of Tables SBAU141 January 2009 Submit Documentation Feedback 13 TEXAS Preface INSTRUMENTS SBAU141 January 2009 Read This First About This Manual This document provides the information needed to set up and operate the DEM PCM2912A EVM evaluation module a test platform for the 16 bit mono microphone input and stereo headphone output single chip PCM2912A stereo audio coder decoder codec with a universal serial bus USB interface For a more detailed description of the PCM2912A product line refer to the product data sheet available from the Texas Instruments web site at http www ti com Support documents are listed in the section of this guide entitled Related Documentation from Texas Instruments How to Use This Manual Throughout this document the abbreviation EVM and the term evaluation module are synonymous with the DEM PCM2912A EVM Chapter 1 gives an overview of the PCM2912A USB interface codec The EVM block diagram and primary features are also discussed Chapter 2 provides general information regarding EVM handling and unpacking absolute operating conditions and the default switch and jumper configuration Chapter 3 is the hardware and software setup guide for the EVM providing all of th
13. 3 2 2 Volume Settings Follow these steps to configure the volume settings for headphones microphone and the recording options To set the headphone volume Step 1 Open the Sound options from the Control Panel Start Control Panel Sound Step 2 Open the Sound and Audio Devices Properties dialog box and select the Volume tab as Figure 3 8 illustrates Alternatively open the Speakers window from the Volume selection box on the Audio tab or the Advanced selection box on the Volume tab see Figure 3 7 Step 3 Set the output volume and the mute levels for headphones from 76 dB to 0 dB The initial volume setting upon installation is approximately 15 dB Al xl Volume Sounds Audio Voice Hardware Bounds and Audio Devices Properties P USB audio CODEC Set the headphone output volume from 76 dB to 0 dB m Device volume gt Set the headphone mute M Place volume icon in the taskb Advanced Push Advanced button to open Speaker window for microphone sidetone volume controls r Speaker settings Use the settings below to change individual 1 speaker volume and other settings I gt Speaker Volume Advanced cme Figure 3 8 Sound and Audio Devices Properties Volume Tab Windows XP 24 Set Up Guide SBAU141 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Basic Operating Set Up Windows XP To set the m
14. 4 4 2 Playback Performance E 34 4 3 Recording B ad o 0E Ile 36 5 Schematic PCB Layout and Bill of Materials nnne nnn rennene 37 5 1 GU e 38 5 2 Printed Circuit Board LAY OUR secs ER 39 5 3 SIONS Ee A0 Julie Vu gr ue 42 SBAU144 January 2009 Contents 3 Submit Documentation Feedback A IA TEXAS INSTRUMENTS www ti com List of Figures 1 1 PCM2912A Pin Assignments seccsticcenceticcvecnedanedantuaueysvaxeedersceneecsceaseealvarfiieeexedaxeededgetatecaiens 11 1 2 DEM PCM2912A EVM Functional Block Diagramm 13 2 1 DEM PCM2912A EVM Block Diagrami 2 2euegOeNRde gege tuent ENER SES EN rsen rs i xD ER views EUREN eu RS 16 3 1 Sound Playback Tab Windows Vista NEE EEN EEN 18 3 2 Sound Recording Tab Windows Vista ANNE EEN EEN ENEE ENEE 18 3 3 Speakers Properties Levels Tab Windows Vista 19 3 4 Microphone Properties Levels Tab Windows Vista EEN 20 3 5 Speakers Properties Advanced Tab Windows Vista 21 3 6 Microphone Properties Advanced Tab Windows Vista cesse HH 22 3 7 Sound and Audio Devices Properties Audio Tab Windows XP 23 3 8 Sound and Audio Devices Properties Volume Tab Windows XP 24 3 9 Speaker Window for Volume Setting Windows AP 25 3 10 Sound and Audio Devices Properties Audio Tab Windows XP 25 3 11 Microphone Volume Windows for Record Volume Setting Windows XP cessere 26 3 12 Sound Input Tab
15. CM2912A EVM for use with a Macintosh computer Step 1 Connect the USB connector of the DEM PCM2912A EVM to an available USB connector or hub port on the lab computer The DEM PCM2912A EVM can be connected directly to the PC without an additional USB cable After the EVM is connected to the PC the standard Mac OS driver installs automatically to the computer system A custom driver for the DEM PCM2912A is unnecessary Step 2 Open the System Environment Settings from the Start menu Open the Sound options from the System Environment settings Step 3 Select the nputtab and confirm the USB audio codec appearance as the default recording device as shown in Figure 3 12 e eo oxy Sound a ki FATERA Display al Q Sound effects Output Input 9027KRrIZ2rZkh HA an Select device for sound input FUYEFEAATSREORR Ka Del Confirm selection ARIT 7 PAR USB audio codec 24 7AZ Zz T44X2X47AJ2PyR b USB audio CODEC MIR LICRBONE Set for selected device Input level AALAIL 000000000000000 Input volum e AJER i UJ i l i i i U Main Volume Mute Sep 0 Oi CEET AUR Display volum e on m enu bar Figure 3 12 Sound Input Tab Mac OS SBAU141 January 2009 Set Up Guide 27 Submit Documentation Feedback JA TEXAS INSTRUMENTS Basic Operating Set Up Mac OS www ti com Step 4 Select the Output tab and confirm the USB audio codec appearance as the default playback de
16. DEM PCM2912A EVM User s Guide TEXAS INSTRUMENTS Literature Number SBAU141 January 2009 Certifi pour Windows Vista SBAU141 January 2009 Submit Documentation Feedback 13 TEXAS INSTRUMENTS Contents iln 7 1 DesScCriPtiOn EE 9 1 1 INTFOAUCTONS RGM 291 E 10 1 1 1 E 10 1 2 Pin Assignments and Terminal Functions is eens nmn nme enn nnne nnn 11 1 3 Functional Block Diagram E 13 2 Getting Started Me 15 2 1 Electrostatic Discharge Warning E 16 2 2 Block QD IE Te LE M PTT TOO IDOL EN KEEN SE SEN Re EE SNE S EE EEN NN RSR EHNEN KENE ebe 16 2 3 Interface andi Gonhecliofis sce exe ante tcamarcsinie O E O sing Oe tedaadeacuaemacenas 16 3 Set Up G id ae 17 3 1 Basic Operating Set Up Windows Vista en 18 3 1 1 Basic Setup Before Evaluation ENEE ENNEN 18 3 1 2 Volume and Mute Settings coucou oder eee mute nn geesde linked eee SEENEN E E dE Ee dee 19 9 159 WE unenee 21 3 2 Basic Operating Set Up Windows XP ENEE ENEE EEN ENNEN EEN nnns nnn nnn 23 3 2 1 Basic Setup Before Evaluation seess a deed idee eseu SE 23 3 2 2 VOIUMESCUINGS icona a e E a i A a 24 3 3 Basic Operating Set Up Mac OS a a a E nen 27 3 3 1 Basic Setup Before Evaluations esse a aa a 27 332 lan EE 29 333 Sampling IFrEQUENCY EE 30 4 Evaluation and Measurements 33 4 1 Measurements for Dynamic Characteristics eee eee eee e eee enne n nene nnnm nnn 3
17. LIEU OF ALL OTHER WARRANTIES EXPRESSED IMPLIED OR STATUTORY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE The user assumes all responsibility and liability for proper and safe handling of the goods Further the user indemnifies TI from all claims arising from the handling or use of the goods Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES TI currently deals with a variety of customers for products and therefore our arrangement with the user is not exclusive TI assumes no liability for applications assistance customer product design software performance or infringement of patents or services described herein Please read the User s Guide and specifically the Warnings and Restrictions notice in the User s Guide prior to handling the product This notice contains important safety information about temperatures and voltages For additional information on Te environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI products or
18. Mac e E 27 3 13 So nd Output Tab Mac OS ae eegdgekee e ee Seege ege geht Ie e GREEN EE ex IUE a NAT E a FEE E ee 28 3 14 Audio Midi Setting Window Mac OS e en enn hne hehe nennen nnn nnne 29 3 15 QuickTime Audio Recording Controls eee e eee eee eee nennen e e meme enm nn nenne nnne 30 3 16 Audio Midi Setting Window Mac OO 31 4 1 DEM PCM2912A EVM Configuration for Playback Performance Measurement 34 4 2 DEM PCM2912A EVM Configuration for Recording Performance Measurement when Recording Data 36 4 3 DEM PCM2704EVM Configuration for Recording Performance Measurement with Recorded Data 36 5 1 DEM PGCM2912A EVM Ehnen geseet eege Ee ume eins sura mmis ER 38 5 2 DEM PCM2912A EVM Board Layout Silkscreen 2 ccc eee eee eee eee eee eee I HII mnn 39 5 3 DEM PCM2912A EVM Board Layout Component Gide ence eee ee sise 39 5 4 DEM PCM2912A EVM Board Layout Inner View 39 List of Figures SBAU141 January 2009 Submit Documentation Feedback 13 TEXAS INSTRUMENTS www ti com List of Tables 1 1 PCM2912A Terminal Functions ie ties eroe teo ss EORR RID DM ERE iain aie UOI MCI D RUP Cede eS 11 2 1 DEM PCM2912A EVM CGonnechors NENNEN ENEE nnne Ei ao Doe tassa nen ai senses nsns nnn nnn 16 4 1 Line Output Playback entgegen ex re oi o on EE Se CIR URR EAR EA NUER EE EE 35 4 2 32 Q Headphone Output Playback Performance EN 35 4 3 16 Q Headphone Output Playback Performance
19. Matsushita ECJ 1VB1C105K C8 1 uF 16 V 10 Matsushita ECJ 1VB1C105K C10 3 3 uF 10 V 1096 Murata SS GRM40B335K10PT C6 10 pF 6 3 V 20 Rohm TCP0J106M8R C9 10 uF 6 3 V 20 Rohm TCP0J106M8R C15 100 uF 4 V 2096 Matsushita ECE A0GKS101 C16 100 uF 4 V 20 Matsushita ECE A0GKS101 CN1 USB A ACON UAR10 4W5100 Host Interface D1 LED Rohm SLR342 VR Recording Indicator D2 LED Rohm SLR342 MG playback Indicator J1 Stereo mini Jack SMK LGY2502 0200 Stereo Headphone J2 Stereo mini Jack SMK LGY2502 0200 Mic Input and Bias R11 16 596 KOA RK73K1J 160J R12 16 5 KOA RK73K1J 160J R1 33 596 KOA RK73K1J 330J Should be adjusted to meet USB spec R2 33 5 KOA RK73K1J 330J R17 820 5 KOA RK73K1J 821J R18 820 5 KOA RK73K1J 821J R19 1k 5 KOA RK73K1J 102J R3 1 5k 5 KOA RK73K1J 152J R13 3 3k 5 KOA RK73K1J 332J R14 3 3k 5 KOA RK73K1J 332J R15 3 3k 5 KOA RK73K1J 332J R16 3 3k 5 KOA RK73K1J 332J R4 1M 5 KOA RK73K1J 105J SW1 Tact SW ALPS SKQTLBEO10 Mic Mute U1 PCM2912APJT TI Y1 Crystal 6 MHz 30 ppm Epson CA301 6 000M C JP2 Jumper SW Hiroshe denshi A2 3PA2 54DSA 71 JP3 Jumper SW Hiroshe denshi A2 3PA2 54DSA 71 40 Schematic PCB Layout and Bill of Materials SBAU141 January 2009 Submit Documentation Feedback JA TEXAS INSTRUMENTS www ti com Component List Table 5 1 Bill of Materials continued Reference Designator Value Value2 Manufacturer Mfr Part No Remarks TP1 Check pin Mac8 HK 4 S TP4 TP5 TP12 TP15 TP2 TP3
20. ODEC Zi 7221k 0H P USB audio CODEC 2 ees LATA USB audio CODEC B System output Properties aa TORFA q USB audio CODEC 2 Clock source Set Speaker 20n 20v7 A DX K bg d A 74 AAA Audio Input A 74 AA Audio Output TAJ f OF 714 X source ZA Source Val Bit Ich 16C v Zi 2ch 16 yh an Mile V apen Mute C Monte a a HS Thru Ki dB LL M pomme 0 07 0 55 1 0 49 2270 0 49 22 70 Select sampling frequency for ADC Select sampling frequency for DAC Figure 3 16 Audio Midi Setting Window Mac OS SBAU141 January 2009 Set Up Guide 31 Submit Documentation Feedback 32 Set Up Guide SBAU141 January 2009 Submit Documentation Feedback 13 TEXAS Chapter 4 INSTRUMENTS SBAU141 January 2009 Evaluation and Measurements This chapter discusses how to set up the DEM PCM2912A EVM for performance evaluation using the Audio Precision SYS 2722 audio analyzer The process of measuring dynamic characteristics is then presented along with example characteristic data Topic Page 4 1 Measurements for Dynamic Characteristics 34 4 2 Playback Performance imete EE EE 34 43 ele ee Tue We e Elte 36 SBAU141 January 2009 Evaluation and Measurements 33 Submit Documentation Feedback I TEXAS INSTRUMENTS Measurements for Dynamic Characteristics www ti com 4 4 Measurements for Dynamic Characteristics Typical d
21. Solutions www ti com lprf Wireless www ti com wireless Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2009 Texas Instruments Incorporated
22. dB to 0 dB Figure 3 15 QuickTime Audio Recording Controls After this process is complete the system volume setting for each component is maintained even if EVM is plugged in out 3 3 3 Sampling Frequency Under the Mac OS X operating system it is necessary to select a specific sampling frequency because the sampling frequency cannot be changed on nearly all application software To set the DAC sampling frequency 1 Open the Audio MIDI Settings options Application Utility Set Audio MIDI as illustrated in Figure 3 16 2 Select the Audio Input tab in the Set Audio MIDI options group as Figure 3 16 shows 3 Select the desired DAC sampling frequency from seven options 8 kHz 11 025 kHz 16 kHz 22 5 kHz 32 kHz 44 1 kHz and 48 kHz To set the ADC sampling frequency 1 Open the Audio MIDI Settings options Application Utility Set Audio MIDI as illustrated in Figure 3 16 2 Select the Audio Output tab in the Set Audio MIDI options group as shown in Figure 3 16 3 Select the desired ADC sampling frequency from seven options 8 kHz 11 025 kHz 16 kHz 22 5 kHz 32 kHz 44 1 kHz and 48 kHz 30 Set Up Guide SBAU144 January 2009 Submit Documentation Feedback 13 TEXAS INSTRUMENTS www ti com Basic Operating Set Up Mac OS EN EN EN Audio MIDI WE Audio MIDI Settings A F ARH MIDI XS System Settings YAFLRE S Audio Device MIDI Device SE Output detant PIAI OAJ db USB audio C
23. e necessary information needed to configure the EVM under various PC operating systems for product evaluation Chapter 4 discusses how to configure the DEM PCM2912A EVM motherboard for performance evaluation using an audio analyzer Chapter 5 includes the EVM electrical schematic printed circuit board PCB layout and the bill of materials Information About Cautions and Warnings This document contains caution statements CAUTION This is an example of a caution statement A caution statement describes a situation that could potentially damage your software or equipment The information in a caution or a warning is provided for your protection Please read each caution and warning carefully Macintosh QuickTime are registered trademarks of Apple Incorporated SYS 2722 is a registered trademark of Audio Precision Inc Windows Windows Vista Windows XP are registered trademarks of Microsoft Corporation All other trademarks are the property of their respective owners SBAU141 January 2009 Read This First 7 Submit Documentation Feedback I TEXAS INSTRUMENTS Related Documentation From Texas Instruments www ti com Related Documentation From Texas Instruments The following documents provide information regarding Texas Instruments integrated circuits used in the assembly of the DEM PCM2912A EVM These documents are available from the TI web site The last character of the literature number corresponds to the document
24. he DEM PCM2912A EVM on personal computers PCs equipped with any of a variety of major operating systems including Microsoft Windows Vista Windows XP and Macintosh OS X and later Topic Page 3 4 Basic Operating Set Up Windows Vista 18 3 2 Basic Operating Set Up Windows XP 23 3 3 Basic Operating Set Up Mac OS 27 SBAU141 January 2009 Set Up Guide 17 Submit Documentation Feedback JA TEXAS INSTRUMENTS Basic Operating Set Up Windows Vista www ti com 3 4 Basic Operating Set Up Windows Vista This section reviews how to set up the DEM PCM2912A EVM for use with a PC equipped with the Microsoft Vista Basic or higher operating system When the installation is complete the EVM software is ready to use 3 1 1 Basic Setup Before Evaluation Follow these steps to set up the DEM PCM2912A EVM for use with Windows Vista Step 1 Connect the USB connector of the DEM PCM2912A EVM to an available USB connector or hub port on the lab PC The DEM PCM2912A EVM can be connected directly to the PC without an additional USB cable After the EVM is connected to the PC the standard Windows Vista driver installs automatically to the PC A custom driver for the DEM PCM2912A is unnecessary Step 2 Open the Control Panel from the Start menu Start Control Panel Open the Sound group from the Control
25. icrophone sidetone 1 Open the Speakers options from the Volume selection box on the Audio tab or the Advanced selection box on the Volume tab see Figure 3 8 Alternatively double click the speaker icon if displayed in the lower right hand area of the Windows taskbar at the bottom of the screen see Figure 3 7 2 Set the volume and the mute levels for the microphone sidetone from 76 dB to 0 dB as shown in Figure 3 9 The initial volume setting upon installation is approximately 8 dB 15 xl Options Help Speaker Wave SW Synth CD Player Microphone Balance Balance Balance Balance Balance Im Set volume and mute Set output volume qj y p g and mute for headphones toutes GE vere for microphone sidetone Volume Volume Volume from 76 dB to 0 dB GIE 24 RS n ur c Ve cu eb Mute all Mute Mute T Mute JSB audio CODI Figure 3 9 Speaker Window for Volume Setting Windows XP To set the record volume 1 Open the Sound options from the Control Panel Start Control Panel Sound 2 Open the Sound and Audio Devices Properties dialog box and select the Microphone tab as Figure 3 10 illustrates bounds and Audio Devices Properties E KAES Volume Sounds Audio Voice Hardware M Sound playback Ga Default device D USB audio CODEC v Volume Advanced M Sound recording A Default device 1
26. in B EL el Vis gt endpoint Selector USB SIE Control S POWER V endpoint PONE MAMP Voou MMUTE KA ATT 0 dB to 76 dB in 1 dB steps with Mute Vol Ke Selector m ISO out REC VourR endpoint HP AMP 15 mW at 32 Q ATT 0 dB to 76 dB in 1 dB steps with Mute USB protocol TESTO FL a controller TESTI FR a o 7o PLL x1 6 Tracker i SpAct 6 000 MHz XTI XTO Figure 1 2 DEM PCM2912A EVM Functional Block Diagram SBAU141 January 2009 Description 13 Submit Documentation Feedback 14 Description SBAU141 January 2009 Submit Documentation Feedback I TEXAS Chapter 2 INSTRUMENTS SBAU141 January 2009 Getting Started This chapter provides information regarding handling and unpacking the DEM PCM2912A EVM as well as the EVM absolute operating conditions and a description of the factory default switch and jumper configurations Topic Page 2 4 Electrostatic Discharge Warning 16 22 Block Diagram EE EE 16 2 3 Interface and Connections 16 SBAU141 January 2009 Getting Started 15 Submit Documentation Feedback TA TEXAS INSTRUMENTS Electrostatic Discharge Warning www ti com 2 1 Electrostatic Discharge Warning Many of the components on the DEM PCM2912A EVM are susceptible to damage by electrostatic discharge ESD Customers are advised to observe proper ESD handling precautions when unpack
27. ing and handling the EVM including the use of a grounded wrist strap at an approved ESD workstation CAUTION Failure to observe ESD handling procedures may result in damage to EVM components 2 2 Block Diagram Figure 2 1 illustrates the DEM PCM2912A EVM block diagram and the default external equipment connection configuration PC l PCM2912A l D D Vin DE dt PLAY VourL R i REC POWER MMUTE MAMP USB Connector PCM2912A EVM Figure 2 1 DEM PCM2912A EVM Block Diagram 2 3 Interface and Connections Table 2 1 lists the connector references for the DEM PCM2912A EVM Table 2 1 DEM PCM2912A EVM Connectors Connectors Part Description CN1 USB connector type A J1 Mono microphone input J2 Headphone output terminal D1 LED red record indicator flash while muting D2 LED green playback indicator flash while muting SW1 Microphone mute switch JP1 Power select L 100 mA H 500 mA JP2 Microphone amplifier gain control Gain 0 dB 20 dB The status of SW1 microphone mute switch is not reflected in the Mic Mute status of the Wave In display on a Windows based PC the operating system does not support an HID function 16 Getting Started SBAU141 January 2009 Submit Documentation Feedback 13 TEXAS Chapter 3 INSTRUMENTS SBAU141 January 2009 Set Up Guide This chapter discusses how to set up t
28. lable USB connector or hub port on the lab PC The DEM PCM2912A EVM can be connected directly to the PC without an additional USB cable After the EVM is connected to the PC the standard Windows XP driver installs automatically to the PC A custom driver for the DEM PCM2912A is unnecessary Step 2 Audio Devices group from the Control Panel Step 3 and recording device as shown in Figure 3 7 Sounds and Audio Devices Properties Volume Sounds Al x Audio Voice Hardware Sound playb Sound recording Advanced Volume Ss Default device Lnd Microsoft GS Wavetable Sw Synth MIDI music playbact Volume About Use only default devices Cancel Apply Open the Control Panel from the Start menu Start Control Panel Open the Sound and Select the Audio tab and confirm the USB audio codec appearance as the default playback Confirm USB audio codec selection Audio tab Push Volume button to open Speaker window for headphone and sidetone volume controls Figure 3 7 Sound and Audio Devices Properties Audio Tab Windows XP This process confirms the proper recognition of the DEM PCM2912A EVM by Windows XP SBAU141 January 2009 Submit Documentation Feedback Set Up Guide 23 JA TEXAS INSTRUMENTS Basic Operating Set Up Windows XP www ti com
29. m 12 dB to 30 dB and set the desired mute Audio MIDI Audio MIDI Settings OZ T42fH MIDI RE System Settings Audio Device MID Derice gt L LATABGE Output default g FI WEDAA qd USB audio CODEC T72ILR OH d USB audio CODEC et property to Ee USB Audio Codec Mput detaut LATLAMA USB audio CODEC gt Sy stem output Properties T 7nAz4 USB audio CODEC Clock source Set Speaker 20 20 A AC ZA tBWBE A F4AAAA Audio input A F 4 ALA Audio Output Source Source Y A t SAS R Format E Veit mis Format Waha K Ja Vyb 11025 0Hz ei 1ch 16Cv Zi 274 Yv Hk 44100 0H2 v 2ch 16Cvh Value Mute Value Mte ME Thu Cn smoky Corr fi de WE Set headphone mute Set recording volume from Set recording mute Set headphone volume from 76 dB to 0 dB 12 dB to 30 dB Figure 3 14 Audio Midi Setting Window Mac OS Set Up Guide 29 SBAU141 January 2009 Submit Documentation Feedback JA TEXAS INSTRUMENTS Basic Operating Set Up Mac OS www ti com To set the microphone sidetone The volume setting of the microphone sidetone is controlled by the individual application software on the Mac For example Audio Recording using QuickTime as shown in Figure 3 15 sets the microphone volume for sidetone from 76dB to OdB en Audio Recording Set volume for microphone sidetone 0 0 MB from 76
30. matic 38 Schematic PCB Layout and Bill of Materials SBAU141 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Printed Circuit Board Layout 5 2 Printed Circuit Board Layout Figure 5 2 through Figure 5 4 illustrate the printed circuit board PCB layout for the DEM PCM2912A EVM Figure 5 2 DEM PCM2912A EVM Board Layout Silkscreen eo o IA fbe amp c em e e eu e a v Figure 5 4 DEM PCM2912A EVM Board Layout Inner View SBAU141 January 2009 Schematic PCB Layout and Bill of Materials 39 Submit Documentation Feedback JA TEXAS INSTRUMENTS Component List www ti com 5 3 Component List Table 5 1 lists the bill of materials for the DEM PCM2912A EVM Table 5 1 Bill of Materials Reference Designator Value Value2 Manufacturer Mfr Part No Remarks C1 22 pF 50 V 5 Taiyoyuden UMK107CH220JZ C2 22 pF 50 V 596 Taiyoyuden UMK107CH220JZ C4 100 pF 50 V 596 Taiyoyuden UMK107CH101JZ C5 100 pF 50 V 596 Taiyoyuden UMK107CH101JZ C13 0 022 uF 25 V 1096 Taiyoyuden TMK107BJ223KA C14 0 022 uF 25 V 10 Taiyoyuden TMK107BJ223KA C7 0 1 uF 25 V 1096 Taiyoyuden TMK105BJ104KV C11 1 uF 16 V 10 Matsushita ECJ 1VB1C105K C12 1 uF 16 V 10 Matsushita ECJ 1VB1C105K C17 1 uF 16 V 10 Matsushita ECJ 1VB1C105K C18 1 uF 16 V 10 Matsushita ECJ 1VB1C105K C3 1 uF 16 V 10
31. nclude e Analog Front End Microphone amplifier 20 dB gain Mono input e Analog Back End Stereo Mono headphone amplifier or line output with volume e Analog Performance Dynamic range 90 dB DAC Dynamic range 90 dB ADC 25 mW headphone output at R 16 Q e Power Supply Voltage Single power supply of 5 0 V Vsus Low Power Dissipation 425 mW at analog to digital converter ADC and digital to analog converter DAC operation 44 1 kHz 0 8 mW in Suspend mode e Sampling Frequency 8 kHz 11 025 kHz 16 kHz 22 05 kHz 32 kHz 44 1 kHz 48 kHz for ADC and DAC e Programmable Function 76 dB to 0 dB gain for analog outputs 12 dB to 30 dB gain for analog inputs 76 dB to 0 dB gain for sidetone 0 dB 20 dB gain for microphone amplifier High pass filter 0 078 xfs cutoff frequency e Package 32 pin TQFP e Operating Temperature Range 25 C to 85 C Description SBAU141 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Pin Assignments and Terminal Functions 1 2 Pin Assignments and Terminal Functions Figure 1 1 shows the pin assignments for the PCM2912A Table 1 1 lists the terminal functions PGND Voce TEST1 TESTO SSPND MMUTE REC PLAY PCM2912APJT Top View Ini n a Ke ac a lt 82 s86 8 BB D zo gt OD gt gt IE 24 23 22 21 20 19 18 17 Vin Voca NC PCM2912APJT AGND 32 pin
32. nd options and select the Advanced tab as Figure 3 6 illustrates 3 Select the desired ADC sampling frequency from seven options 8 kHz 11 025 kHz 16 kHz 22 5 kHz 32 kHz 44 1 kHz and 48 kHz Set Up Guide 4x Microphone Properties General Levels Advanced Default Format Select the sample rate and bit depth to be used when running in shared me es hannel 16 bit 44100 H D Quality 1 channel 16 bit 8000 Hz Telephone Quality 1 channel 16 bit 11025 Hz Dictation Quality E1 channel 16 bit 16000 Hz Tape Recorder Quali 1 channel 16 bit 22050 Hz AM Radio Quality 1 channel 16 bit 32000 Hz FM Radio Pi i 1 channel 16 bit 48000 Hz DVD Quality Select ADC sampling frequency Restore Defaults I TEXAS INSTRUMENTS www ti com Figure 3 6 Microphone Properties Advanced Tab Windows Vista SBAU144 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com 3 2 Basic Operating Set Up Windows XP Basic Operating Set Up Windows XP This section reviews how to set up the DEM PCM2912A EVM for use with a PC equipped with the Microsoft XP including Service Pack 2 updates operating system When the installation is complete the EVM software is ready to use 3 2 1 Basic Setup Before Evaluation Follow these steps to set up the DEM PCM2912A EVM for use with Windows XP Step 1 Connect the USB connector of the DEM PCM2912A EVM to an avai
33. nd the balance for headphones from 76 dB to 0 dB To set the microphone sidetone Step 1 Open the Sound options from the Control Panel Start Control Panel Sound Step 2 Open the speaker properties of the USB audio codec from the Sound options and select the Levels tab as Figure 3 3 illustrates Step 3 Set the volume and the mute levels for the microphone sidetone from 76 dB to 0 dB SS Set the headphone output volume mute and balance Speakers n Microphone U Set the microphone sidetone volume and mute Figure 3 3 Speakers Properties Levels Tab Windows Vista SBAU141 January 2009 Set Up Guide 19 Submit Documentation Feedback I TEXAS INSTRUMENTS Basic Operating Set Up Windows Vista www ti com To set the record volume Step 1 Open the Sound options from the Control Panel Start Control Panel Sound Step 2 Open the microphone properties of the USB audio codec from the Sound options and select the Levels tab as Figure 3 4 illustrates Step 3 Set the microphone volume and the recording mute level from 12 dB to 30 dB Microphone Set the microphone volume and mute for recording Figure 3 4 Microphone Properties Levels Tab Windows Vista After this process is complete the system volume setting for each component is maintained even if EVM is plugged in out 20 Set Up Guide SBAU141 January 2009 Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti
34. ng DR 60 dBFS 400 Hz to 20 kHz 16 Q 89 4 dB 89 3 dB input Pre Anlr A weighting SBAU144 January 2009 Submit Documentation Feedback Evaluation and Measurements 35 Recording Performance 4 3 Recording Performance JA TEXAS INSTRUMENTS www ti com The DEM PCM2912A EVM playback performance presented in this section was obtained under the following conditions e fg 44 1 kHz e Input PGA Microphone input volume 0 dB e Jumper setting set JP1 to 100 mA and JP2 to 0 dB e Application software for playback Sound Recorder Media Player and ITunes for Windows Vista XP QuickTime and ITunes for Mac OS X e Use analog input data provided by the AP2 analog generator SYS 2722 with unbalanced floating ground setting Configure the equipment as shown in Figure 4 2 PC Recording at f 44 1 kHz by application software for example Sound Recorder QuickTime etc USB Connector Headphone 100 mA PCM2912A EVM Audio Precision SYS 2722 Analog Generator Unbalanced Floating GND setting Figure 4 2 DEM PCM2912A EVM Configuration for Recording Performance Measurement when Recording Data To measure recording performance with the recording data use S PDIF digital interface output data Connect the EVM to the AP2 digital analyzer SYS 2722 for example as the DEM PCM2704 EVM shown in Figure 4 3 PC Volume gain 0 dB
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37. services might be or are used FCC Warning This evaluation board kit is intended for use for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use It generates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other environments may cause interference with radio communications in which case the user at his own expense will be required to take whatever measures may be required to correct this interference EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 2 0 V to 4 0 V and the output voltage range of 2 0 V to 4 0 V Exceeding the specified input range may cause unexpected operation and or irreversible damage to the EVM If there are questions concerning the input range please contact a TI field representative prior to connecting the input power Applying loads outside of the specified output range may result in unintended operation and or possible permanent damage to the EVM Please consult the EVM User s Guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal
38. to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed TI assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using Tl components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeguards TI does not warrant or represent that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties conditions limitations and notices Reproduction of this information with alteration is an unfair and deceptive business practice TI is not responsible or liable for such altered documentati
39. vice as shown in Figure 3 13 eoo 377HK Sound EEN a Sound effects Output Input 9 57EFI2 142Mk BR AH e Select device for sound output FIYEEHATSREORR lt 7 uu eem RE OSZE AREH E USB audio CODEC USB Confirm selection USB audio codec SUR LICRBONME Set for selected device Balance NOVA E z Lef Right Main Volume Mute ERR 9 w i Cs CEET E Display volum e on m enu bar Figure 3 13 Sound Output Tab Mac OS This process confirms the proper recognition of the DEM PCM2912A EVM by Mac OS X 28 Set Up Guide SBAU141 January 2009 Submit Documentation Feedback 13 TEXAS INSTRUMENTS www ti com Basic Operating Set Up Mac OS 3 3 2 Volume Settings Follow these steps to configure the volume settings for headphones microphone and the recording options To set the headphone volume Step 1 Open the Audio MIDI Settings options Application Utility Set Audio MIDI as illustrated in Figure 3 14 Alternatively open the Output tab of the Sound options as illustrated in Figure 3 13 Set the headphone volume and the audio output levels from 76 dB to 0 dB and set the Step 2 desired mute To set the record volume 1 Open the Audio MIDI Settings options Application Utility Set Audio MIDI as illustrated in Figure 3 14 Alternatively open the nput tab of the Sound options as illustrated in Figure 3 12 2 Set the recording level fro
40. ynamic performance graphs for playback and recording devices generally represent three performance characteristics in addition to other specifications total harmonic distortion and noise THD N signal to noise ratio SNR and dynamic range DR For playback devices channel separation is also a performance characteristic These graphs also specify the test environment and measurement conditions required in order to meet typical performance values defined in the product data sheet For the DEM PCM2912A EVM the evaluation environment specifications are e Equipment used Audio Precision System Two Cascade Plus e Power supply Vous 5 0 V Bus power setting e Temperature Room ambient 4 2 Playback Performance The DEM PCM2912A EVM performance presented in this section was obtained under the following conditions e fg 44 1 kHz Output PGA Speaker output volume 0 dB e Sidetone from microphone PGA 76 dB mute e RH 210k0 32 0 16 Q are inserted into headphone jack J2 for headphone output e Jumper setting set JP1 to 100 mA and JP2 to 0 dB e Application software for playback Sound Recorder Media Player and ITunes for Windows Vista XP QuickTime and ITunes for Mac OS X e Equipment AP2 Analog Analyzer SYS 2722 Configure the equipment as shown in Figure 4 1 PC Playing test data at f 44 1 kHz by application software Audio Precision for example Sound Recorder Media Player etc SYS 2722
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