Texas Instruments SLOU023A User's Manual
Contents
1. Vo1 VDD 2 510 5 5 V IN 1 GND IN 1 Vo2 TPA112 MSOP GND R6 20 ko Details 3 3 The TPA112 MSOP Audio Power Amplifier Evaluation Module 3 2 1 TPA112 Audio Amplifier IC The TPA112 audio amplifier IC is a CMOS device intended primarily for high performance line level output headphone driver and small speaker applications It is supplied in both a SOIC and a very small surface mount MSOP package and has been designed to operate from low supply voltages between approximately 2 5 V and 5 5 V and to deliver up to approximately 150 mW into 8 Q speakers As a line level driver distortion levels THD N are below 0 02 into 10 kQ loads across the audio band 20 Hz to 20 kHz As a headphone driver distortion levels are below 1 into 32 Q loads across the audio band And as a speaker driver distortion levels are below 2 into 8 Q loads across the audio band Typical applications include portable computers desktop computers personal audio toys games and similar audio applications The IC includes two separate internal amplifiers with onboard short circuit and over temperature protection circuits Figure 3 4 The load for each channel is connected between the Vo pin and GND through a coupling capacitor For more information see the TPA112 amplifier IC data sheet TI Literature Number SLOS212 Figure 3 4 TPA112 Amplifier IC 3 4 Short Circu2. 5 5 V or damage to the IC may result In no case should Vpp voltage ofthe incorrect polarity orin excess of 6 1 V be applied to screw terminals J6 of the platform or the power protection circuit on the Vpp line will trip O Vcc voltage applied to the platform MUST NOT exceed the maximum voltage input specified for the voltage regulator module installed in socket U6 12 V for the SLVP097 or damage to the voltage regulator module may result In no case should Vcc voltage applied to the platform exceed 15 V or the overvoltage protection circuit on the Vcc bus will trip Details Using The TPA112 MSOP EVM With the Plug N Play Evaluation Platform 3 3 4 Inputs and Outputs 3 3 4 1 Inputs 3 3 4 2 Outputs The TI plug n play audio amplifier evaluation platform is equipped with several standard conectors for audio inputs and outputs In most cases audio signals enter the platform through either a pair of RCA phono jacks J3 and J5 or a miniature 1 8 stereo phone jack J4 Certain signal conditioning and amplifier EVMs however may have additional signal input connectors mounted on the module circuit board The platform audio signal input jacks J3 J4 and J5 are of the closed circuit type grounding the signal input lines when no plugs are inserted Output signals from the headphone amplifier U5 leave the platform through aminiature 1 8 stereo headphone jack J10 Amplified audio output signals from the power amplifie
3. s TEXAS INSTRUMENTS TPA112 MSOP Audio Power Amplifier Evaluation Module User s Guide 2001 Mixed Signal Products SLOU023A IMPORTANT NOTICE Texas Instruments and its subsidiaries Tl reserve the right to make changes to their products or to discontinue any product or service without notice and advise customers to obtain the latest version of relevant information to verify before placing orders that information being relied on is current and complete All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment including those pertaining to warranty patent infringement and limitation of liability TI warrants performance of its products to the specifications applicable at the time of sale in accordance with TP s standard warranty Testing and other quality control techniques are utilized to the extent Tl deems necessary to support this warranty Specific testing of all parameters of each device is not necessarily performed except those mandated by government requirements Customers are responsible for their applications using Tl components In order to minimize risks associated with the customer s applications adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards Tl assumes no liability for applications assistance or customer product design TI does not warrant or represent that any license either express or imp
4. 0 eee eee 3 7 3 6 Typical Headphone Plug 00 cece cette tenet nets 3 9 3 7 TPA112 MSOP EVM Connected as a Stereo Headphone Amplifier 3 10 Tables 2 1 Typical TI Plug N Play Platform Jumper and Switch Settings for the JPATIZ MSOP EVM stots Wome apodo alti ian uu Esa Lo haus 2 1 2 2 Platform Jumper and Switch Settings for the TPA112 MSOP EVM 2 3 3 1 TPA112 MSOP EVM Parts List sssssssssssssseee e en 3 11 vi Chapter 1 Introduction This chapter provides an overview of the Texas Instruments TI TPA112 MSOP audio amplifier evaluation module SLOP126 It includes a list of EVM features a brief description of the module illustrated with a pictorial diagram and a list of EVM specifications Topic Page Td TC as cies ee O oO aaa 1 2 1 22 Description aee a ao 1 3 1 3 TPA112 MSOP EVM Specifications seeeeeeee 1 3 Features 1 1 Features The TI TPA112 MSOP audio amplifier evaluation module and the TI plug n play audio amplifier evaluation platform include the following features Y TPA112 MSOP Stereo Audio Power Amplifier Evaluation Module Dual channel single ended operation 150 mW output power per channel into 8 Q at 5 V 2 5 V to 5 5 V operation Distortion THD N is less than 0 01 1 kHz and less than 0 02 from 20 Hz to 20 kHz into 10 kQ loads less than 0 06 1 kHz and less than 1 from 20 Hz to 20 kHz into 32 Q loads and
5. It can drive either line level outputs 32 O headphones or 8 Q speakers A single supply operational amplifier TLV2211 on the module provides a buffered midpoint voltage to properly bias the noninverting inputs of the TPA112 amplifier IC The evaluation module can be used with the TI plug n play audio amplifier evaluation platform Figure 3 1 or wired directly into circuits or equipment The module has single in line header connector pins mounted to the under side of the board These pins allow the module to be plugged into the TI platform which automatically makes allthe signal input and output power and control connections to the module The module connection pins are on 0 1 inch centers to allow easy use with standard perf board and plug board based prototyping systems Or the EVM can be wired directly into existing circuits and equipment when used stand alone The module appears in Figure 3 2 and its schematic is shown in Figure 3 3 Figure 3 2 TPA112 MSOP EVM TEXAS Vdd O OGND INSTRUMENTS O IN1 O IN1 C5 C4 R7 o C7 R9 R10 GND O Vo2 O SLOP126 TPA112 MSOP EVM T Due to the very small size of the MSOP IC package the standard part number TPA112 is replaced with the code TIAAD Figure 3 3 TPA112 MSOP EVM Schematic Diagram Audio Input 1 IN IN Audio Input 2 IN
6. 12 is replaced with the code TIAAD Details 3 11 3 12 Details
7. Inputs and outputs 3 Ensure that the signal source level is set to minimum 4 Connecta differential audio signal source between module pins IN1 and IN1 right channel and between pins IN2 and IN2 left channel If a single ended audio source is used connect it to IN1 and IN2 right and left channels and ground both IN1 and IN2 5 Connect 32 Q headphones to the module Vo1 Vo2 pins through 33 uF to 1000 uF output coupling capacitors figure 3 8 and return to the GND pin or 6 For line output connections to the Vo1 and Vo2 pins must be made through 33 uF to 1000 uF output coupling capacitors and returned to GND Power up 7 Verify correct voltage and input polarity and set the external power supply to ON The EVM should begin operation 8 Adjust the signal source level as needed 2 4 Quick Start Chapter 3 Details This chapter provides details on the TPA112 IC the evaluation module the steps in the Quick Start List additional application information and a parts list for the TPA112 MSOP evaluation module Topic Page 3 17 Preca tions omen CS 3 2 3 2 The TPA112 MSOP Audio Power Amplifier Evaluation Module 3 3 3 3 Using The TPA112 MSOP EVM With The Plug N Play Evaluation Plattorm ata vette 3 6 3 4 Using The TPA112 MSOP EVM Stand Alone 3 10 3 5 TPA112 MSOP Audio Power Amplifier EVM Parts List 3 11 3 1 Precautions 3 1 Precautions Powe
8. RUMENTS C1 0L D R1 END R2 Ga HH C7 R9 R10 GND G SLOP126 TPA112 MSOP EVM 33 uF 1000 uF NI T 33 uF 1000 uF T Due to the very small size of the MSOP IC package the standard part number TPA112 is replaced with the code TIAAD 3 10 Details TPA112 MSOP Audio Power Amplifier Evaluation Module Parts List 3 5 TPA112 MSOP Audio Power Amplifier Evaluation Module Parts List Table 3 1 TPA112 MSOP EVM Parts List EVM Manufacturer Ref Description Size Qty Part Number Vendor Number C3 C6 Capacitor 1 uF 80 0603 2 Murata Newark 2096 nonpolarized SMD GRM39 Y5V105Z10PT C5 Capacitor 10 uF 6 3 V A 1 Panasonic Digi Key SMD ECS TOJY106R PCS1106CT ND C1 C2 Capacitor 0 1 uF 80 0603 4 Murata Newark C4 C7 2096 nonpolarized SMD GRM39 Y5V104Z10PT R1 R9 Resistor 20 kO 1 16 W 0603 6 Panasonic Digi Key RA R7 5 SMD ERJ 3GSYJ203 P20KGCT ND R2 R3 Resistor 82 kQ 1 16 W 0603 4 Panasonic Digi Key R8 R10 5 SMD ERJ 3GSYJ823 P82KGCT ND U1 IC TPA112 audio MSOP 8 1 TI amplifier 150 mW TPA112DGNT 2 channel SMD U2 IC TLV2211 SOT23 1 TI single supply operational amplifier SMD Terminal post headers 11 Sullins Digi Key S1022 36 ND PCB1 PCB TPA112 MSOP EVM 1 SLOP126 t Due to the very small size of the MSOP IC package the standard part number TPA1
9. e eee eae 2 4 DICIT 3 1 3 1 Precautiolss soci usu uRERQuEPERIOEEEI ERI OU ede as dried ii dates 3 2 3 2 The TPA112 MSOP Audio Amplifier Evaluation Module Lsuueesssse 3 3 3 244 TPA112 Audio Amplifier IC 0 0 ccc eee ees 3 4 3 2 2 gt Module Gai sevi neo reete eie tute cit iced e bees 3 5 3 3 Using The TPA112 MSOP EVM With The Plug N Play Evaluation Platform 3 6 3 3 1 Installing and Removing EVM Boards 0 ce eee ee eee ees 3 6 3 3 2 Signal Routing sssuiesssssssssssss sess 3 7 3 8 8 Power Requirements sseueuseeeeseeees ee nnn 3 8 3 9 5 Inputs and Outputs see eee x aaa 3 9 3 4 Using The TPA112 MSOP EVM Stand Alone ssesssesslsesee esee 3 10 3 4 44 TPA112 MSOP EVM Connected as a Stereo Headphone Amplifier 3 10 3 5 TPA112 MSOP Audio Amplifier Evaluation Module Parts List 3 11 Figures 1 1 The TI TPA112 MSOP Audio Amplifier Evaluation Module 02000000 1 3 2 1 Quick Start Platform Map b bernubed ele dB uk Sieb ure oie da EPI 2 2 2 2 Quick Start Module Map 0 0 cece e rn 2 4 3 1 The TI Plug N Play Audio Amplifier Evaluation Platform 0 2 cee eee eee 3 2 3 2 TPATIZ MSOP EVM otro open esa cr RE den ru pu dv ect pe 3 3 3 3 TPA112 MSOP EVM Schematic Diagram sasssa aeaaee 3 3 3 4 TPA112 Audio Amplifier IC lliiisssssssssseee III 3 4 3 5 Platform Signal Routing and Outputs
10. he TI plug n play audio amplifier evaluation platform It simply plugs into socket U5 The following paragraphs provide additional details for using the TPA112 EVM with the platform Installing and Removing EVM Boards TI plug n play evaluation modules use single in line header pins installed on the underside of the module circuit board to plug into sockets on the platform The EVM pins and the platform sockets are keyed such that only the correct type of EVM can be installed in a particular socket and then only with the proper orientation Evaluation modules are easily removed from the platform by simply prying them up and lifting them out of their sockets Care must be taken however to prevent bending the pins 3 3 1 1 EVM Insertion 1 Remove all power from the evaluation platform 2 Locate socket U5 on the platform 3 Orient the module correctly 4 Carefully align the pins of the module with the socket pin receptacles 5 Gently press the module into place 6 Check to be sure that all pins are seated properly and that none are bent Over 3 3 1 2 EVM Removal 3 6 1 Remove all power from the evaluation platform 2 Using an appropriate tool as a lever gently pry up one side of the module a short distance 3 Changeto the opposite side of the module and use the tool to pry that side up a short distance 4 Alternate between sides prying the module up a little more each time to avoid bending the pins until it c
11. it VDD Protection Over Temperature Protection Details 3 2 2 Module Gain The TPA112 MSOP Audio Power Amplifier Evaluation Module The TPA112 MSOP evaluation module has a set gain of 4 inverting for each channel However the gain can be adjusted to a maximum of approximately 10 inverting by changing the value of feedback resistors R8 and R10 Figure 3 3 Use the following equation to determine the value of Rp Re Gain TR The TPA112 amplifier IC like most other amplifiers exhibits its best distortion and noise performance at lower gain levels In addition higher gain levels require a small compensation capacitor to ensure stability see the TPA112 data sheet Gain versus total harmonic distortion THD and gain versus signal to noise ratio SNR should be considered in each application Both the module input signal level and the TPA112 MSOP module gain should be adjusted to obtain the lowest overall distortion level for a particular overall gain A quick rule of thumb everything else being equal the module input signal level should be as high as possible without clipping or overloading the TPA112 input and the TPA112 gain should be kept as low as possible Details 3 5 Using The TPA112 MSOP EVM With the Plug N Play Evaluation Platform 3 3 Using The TPA112 MSOP EVM With the Plug N Play Evaluation Platform 3 3 1 The TPA112 MSOP audio amplifier evaluation module is designed for use with t
12. less than 0 1 1 kHz and less than 2 from 20 Hz to 20 kHz into 8 4 loads Internal thermal and short circuit protection Quick and Easy Configuration With the TI Plug N Play Audio Amplifier Evaluation Platform Evaluation module is designed to simply plug into the platform automatically making all signal control and power connections Platform provides flexible power options Jumpers on the platform select power and module control options Switches on the platform route signals Platform provides quick and easy audio input and output connections O Platform Power Options Onboard 9 V battery External 5 V 15 V Vcc supply inputs External regulated Vpp supply input Socket for onboard 5 V Vpp voltage regulator EVM Onboard overvoltage and reverse polarity power protection Platform Audio Input and Output Connections Left and right RCA phono jack inputs Miniature stereo phone jack input Left and right RCA phono jack outputs Left and right compression speaker terminal outputs Miniature stereo headphone jack output Introduction Description 1 2 Description The TPA112 MSOP audio power amplifier evaluation module is a complete low power stereo audio power amplifier for high fidelity line level output headphone and small speaker applications It consists of the TI TPA112 150 mW stereo audio power amplifier IC in a very small MSOP package along with a small number of other parts mounted on a circuit board that i
13. lied is granted under any patent right copyright mask work right or other intellectual property right of TI covering or relating to any combination machine or process in which such products or services might be or are used TI s publication of information regarding any third party s products or services does not constitute Tl s approval license warranty or endorsement thereof Reproduction of 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 Representation or reproduction of this information with alteration voids all warranties provided for an associated TI product or service is an unfair and deceptive business practice and TI is not responsible nor liable for any such use Resale of Tl s products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service is an unfair and deceptive business practice and TI is not responsible nor liable for any such use Also see Standard Terms and Conditions of Sale for Semiconductor Products www ti com sc docs stdterms htm Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright O 2001 Texas Instruments Incorporated Preface Related Documentation From Texas Instruments B T Plug N Pla
14. omes loose from the socket 5 Liftthe EVM off the platform Details Using The TPA112 MSOP EVM With the Plug N Play Evaluation Platform 3 3 2 Signal Routing Signal flow on the platform is controlled by two signal routing switches as shown in Figure 3 5 Figure 3 5 Platform Signal Routing and Outputs p U2 Stereo Power al Amplifier EVM Off y e U3 i e gt R PEENE A ER E Mono Power R R l Amplifier EVM gt J7 J8 J9 Audio UE sg e Speaker Input Signal U4 Outputs 1 Conditioning 79 1 1 nd i 1 DO a Mono Power L L eons NECS Ets Amplifier EVM 8 gt EE J U2 U4 eexeeeaeeeee a R U5 R yet TPA112 MSOP N J10 LA Headphone S3 Headphone Amplifier EVM L ed Output PUB ne E it A gt L U5 3 3 2 1 Signal Conditioning The audio signal from the input jacks can be applied to the signal conditioning socket U1 if an EVM is installed there or socket U1 can be bypassed and the audio input signal applied directly to the inputs ofthe TPA112 power amplifiers YU Switch S2 selects or bypasses signal conditioning 3 3 2 2 Headphone Output Jack Switch S3 is the source select for the stereo headphone output jack J10 The headphone jack is capacitively coupled via 470 uF electrolytics It can output either the signal from the the TPA112 MSOP headphone amplifier in socket U5 or the signal from powe
15. own in Figure 2 1 and details appear in Chapter 3 Platform preparations 1 Ensurethatall external power sources are setto OFFand thatthe platform power switch S1 is set to OFF 2 Install a TPA112 MSOP module in platform socket U5 taking care to align the module pins correctly 3 Use switch S2 to select or bypass the signal conditioning EVM U1 4 Set Hp source switch S3 to U5 to route the output signal to the headphone Jack J10 Table 2 2 Platform Jumper and Switch Settings for the TPA112 MSOP EVM EVM JP6 JP7 JP8 S2 3 TPA112 X X X Note 2 US Notes 1 X Don t care 2 Set S2to ON when signal conditioning board is installed in U1 set S2 to OFF when no signal conditioning board is installed YU Power supply 5 Select and connect the power supply a Connectan external regulated power supply set to a voltage between 2 5 V and 5 5 V to platform Vpp power input connector J6 taking care to observe marked polarity or b Install a 3 V to 5 V voltage regulator EVM SLVP097 or equiv in platform socket U6 Install a 9 V battery in B1 or connect a 7 V 12 V power source to a platform Vcc power input J1 or J2 and jumper the appropriate power input see platform user s guide Inputs and outputs 6 Ensure that signal source level is set to minimum 7 Connectthe audio source to left and right RCA phono jacks J3 and J5 or stereo miniature phone jack J4 8 Connect 32 0 headphones to headphone jack J10 Y Powe
16. r Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to Vcc power input connector J1 J2 and or Vpp power input connector J6 are correct Overvoltage or reverse polarity power applied to these terminals can open onboard soldered in fuses and cause other damage to the platform installed evaluation modules and or the power source Inserting or Removing EVM Boards Do not insert or remove EVM boards with power applied damage to the EVM board the platform or both may result Figure 3 1 The TI Plug N Play Audio Amplifier Evaluation Platform o o O O lt w o D n c s y DC Power In Out Power Input 8 O M O O 8 jo 8 o JO O O 9 8 ete O O Speaker p Output oo jo o O S o a JO Q s O o e 3 Q o 2 Q O C AUTION O Do not insert or remove O EVM boards with power applied O Headphone Output Plug N Play Audio Amplifier Evaluation Platform SLOP097 Rev C 1 3 2 Details The TPA112 MSOP Audio Power Amplifier Evaluation Module 3 2 The TPA112 MSOP Audio Power Amplifier Evaluation Module The TPA112 MSOP audio power amplifier evaluation module is powered by a TPA112 150 mW stereo audio amplifier IC
17. r amplifiers installed in socket U2 or in sockets U3 and U4 as determined by the setting of headphone source select switch S3 When S3 is set to the headphone amplifier position U5 the headphone jack is connected to the headphone amplifier EVM output lines When a plug is inserted into the jack signals output through J10 are returned to platform ground QU Switch S3 connects the headphone jack to either the headphone amplifier platform socket U5 or to the platform power amplifier sockets U2 U4 Details 3 7 Using The TPA112 MSOP EVM With the Plug N Play Evaluation Platform 3 3 3 Power Requirements 3 8 The TPA112 MSOP audio power amplifier evaluation module can operate from a Vpp voltage between approximately 2 5 V and 5 5 V The TI plug n play audio amplifier evaluation platform with a voltage regulator EVM installed on it can provide a regulated 3 3 V or 5 V Vpp supply from a wide variety of unregulated Vcc voltage inputs between approximately 5 5 V and 12 V including an onboard 9 V battery Or an external regulated power source can be used to supply Vpp voltage to the platform and the TPA112 evaluation module installed on it The platform is equipped with overvoltage and reverse polarity supply voltage input protection in the form of fused crowbar circuits 1 Vpp voltage applied to platform screw terminals J6 MUST NOT exceed the absolute maximum rating for the TPA112 amplifier IC installed on the evaluation module
18. r up 9 Verify correct voltage and input polarity and setthe external power supply to ON If Vcc and an onboard regulator EVM are used to provide Vpp set platform power switch S1 to ON Platform LED2 should light indicating the presence of Vpp and the evaluation modules installed on the platform should begin operation 10 Adjust the signal source level as needed Quick Start 2 3 Quick Start List for Stand Alone 2 3 Quick Start List for Stand Alone Follow these steps to use the TPA112 MSOP EVM stand alone or to connect it into existing circuits or equipment Connections to the TPA112 MSOP module header pins can be made via individual sockets wire wrapping or soldering to the pins either on the top or the bottom of the module circuit board Figure 2 2 Details appear in Chapter 3 Figure 2 2 Quick Start Module Map TEXAS Vdd O O GND INSTRUMENTS O IN1 5 C4 R7 O IN1 IET R5 NC R6 ns EST E C3 b C7 R9 R10 GND O J oN SLOP126 Wed O IN2 TPA112 MSOP EVM T Due to the very small size of the MSOP IC package the standard part number TPA112 is replaced with the code TIAAD J Power supply 1 Ensure that all external power sources are setto OFF 2 Connectan external regulated power supply setto 5 V to the module VDD and GND pins taking care to observe marked polarity
19. rent Ipp teenie truna aa a RYE SAN poate eas a REA DIAM LE RR 160 mA max Continuous output power Po 8 Q Vop 5V ssseseeee e 150 mW Audio input voltage V issssssssssssss eee eee Vpp 0 3 Vpp max Minimum load impedance RL c ooccccccocccncccnc ees 80 Introduction 1 3 Introduction Chapter 2 Quick Start The steps in this chapter can be followed to quickly prepare the TPA112 MSOP audio amplifier EVM for use Using the TPA112 MSOP EVM with the TI plug n play audio amplifier evaluation platform is a quick and easy way to connect power signal and control inputs and signal outputs to the EVM using standard connectors However the audio amplifier evaluation module can be used stand alone by making connections directly to the module pins and can be wired directly into existing circuits or equipment The platform switch and jumper settings shown in Table 2 1 are typical for the TPA112 MSOP EVM Table 2 1 Typical TI Plug N Play Platform Jumper and Switch Settings for the TPA112 MSOP EVM EVM JP6 JP7 JP8 S2 S3 TPA112 X X X Note 2 U5 Notes 1 X Don t care 2 Set S2to ON when signal conditioning board is installed in U1 set S2 to OFF when no signal conditioning board is installed Topic Page DEV Precautions cereo A edere reel etm E estet eie e eta e e m 2 2 2 2 Quick Start Listifor Platform caco naaa ro a 2 3 2 3 Quick Start List for Stand Alone leeeee eene 2 4 2 1 Precau
20. rs U2 U4 leave the platform through left and right RCA phono jacks J7 and J9 left and right pairs of compression connectors for stripped speaker wires J8 and optionally through the headphone jack The audio output lines from the power amplifiers are separate all the way to the edge of the platform output jacks J7 J8 and J9 the OUT lines from the power amplifier sockets are not tied to each other or to platform ground This allows the power amplifier EVMs to operate in the highly efficient bridge tied load configuration The headphone jack J10 is capacitively coupled to source select switch S3 which connects J10 to the output lines of either the headphone amplifier socket or the power amplifier sockets Figure 3 5 When the TPA112 MSOP EVM output signal is routed to J10 by S3 signals output via J10 are returned to platform ground when a plug is inserted Figure 3 6 Figure 3 6 Typical Headphone Plug Left Right GND Details 3 9 Using The TPA112 MSOP EVM Stand Alone 3 4 Using The TPA112 MSOP EVM Stand Alone Using the TPA112 MSOP audio power amplifier evaluation module stand alone is much the same as using it with the platform The same 2 5 V to 5 5 V power supply requirement exists 3 4 1 TPA112 MSOP EVM Connected as a Stereo Headphone Amplifier Figure 3 7 TPA112 MSOP EVM Connected as a Stereo Headphone Amplifier Audio Input Right Audio Input Left 5 VDC TEXAS INST
21. s approximately one and a quarter inches square Figure 1 1 Figure 1 1 The TI TPA112 Audio Amplifier Evaluation Module TEXAS Vdd O OGND INSTRUMENTS CN O IN1 C4 R7 O IN1 R5 TE SLOP126 TPA112 MSOP EVM t Due to the very small size of the MSOP IC package the standard part number TPA112 is replaced with the code TIAAD Single in line header pins are mounted to the underside of the module circuit board to allow the EVM to either be plugged into the Tl plug n play audio amplifier evaluation platform or to be wired directly into existing circuits and equipment when used stand alone The platform has room for a single TPA112 evaluation module lt is a convenient vehicle for demonstrating Tl s audio power amplifier and related evaluation modules The EVMs simply plug into the platform which automatically provides power to the modules interconnects them correctly and connects them to a versatile array of standard audio input and output jacks and connectors Easy to use configuration controls allow the platform and EVMs to quickly model many possible end equipment configurations There is nothing to build nothing to solder and nothing but the speakers included with the platform to hook up 1 3 TPA112 MSOP EVM Specifications Supply voltage range VDD sssssssssese III 2 5 V to 5 5 V Supply cur
22. tions 2 1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to Vcc power input connector J1 J2 and or Vpp power input connector J6 are correct Overvoltage or reverse polarity power applied to these terminals can open onboard soldered in fuses and cause other damage to the platform installed evaluation modules and or the power source Inserting or Removing EVM Boards Do not insert or remove EVM boards with power applied damage to the EVM board the platform or both may result Figure 2 1 Quick Start Platform Map DC Power In Out Power e R1 Sm 5 o SR Signal Conditioning O O O 3 9 8 Audio So Speaker laput Output O e318 p 2 a O O E o S e a O O O C AUTION Do not insert or re S i 832 35 Headphone R Output Plug N Play Audio Amplifier Evaluation Platfoym SLOP097 Rev 1 SLNAWNYLSNI 2 2 Quick Start Quick Start List for Platform 2 2 Quick Start List for Platform Follow these steps when using the TPA112 MSOP EVM with the TI plug n play audio amplifier evaluation platform see the platform user s guide SLOU011 for additional details Numbered callouts for selected steps are sh
23. y Audio Amplifier Evaluation Platform literature number SLOU011 provides detailed information on the evaluation platform and its use with Tl audio evaluation modules B TPA112 150 mW Stereo Audio Power Amplifier literature number SLOS212 This is the data sheet for the TPA112 audio amplifier integrated circuit 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 will be required to take whatever measures may be required to correct this interference Trademarks Tl is a trademark of Texas Instruments Incorporated 1 Contents Introduction cee sie 0 et ee ee ee ED EE EIN RUE UEM 1 1 1 1 Feature Highlights cc see gies eevee seres eh ees ERROR OE POR Dx 1 2 132 DeSCrpllOnecs esos Serre rt rrr eee Pea tt ate cv IR atn OY 1 3 1 3 TPA112 MSOP EVM Specifications 0 00 ccc eh 1 3 Quick Sta esle a le eet ieee a AS i a AS a NN ite 2 1 2 1 PrOCAU NS EET 2 2 2 2 Quick Start List tor PIatformr v2 00 209 sonoro rd rea 2 3 2 3 Quick Start List for Stand Alone 0 cec
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