dam1021 user manual 20151005
Contents
1. oekris Engineering ApS dam1021 series boards User s Manual oo0oo0o0o000 deteltstststets We Vers 0 90 September 2015 Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 1 of 18 Table of Contents INTRODUCTION BE 3 Sandan Coni Te te 3 EE 4 IS NRI D 5 CONNEC FORE S AND INDICATORS E 6 Power Connector Header J rm T 6 Power Rails Connector Header J2 s scsccccsssssssssessscccccscccsssessssccccesccasssesescecceseeessssceseusscesasescs 7 ere E EE 7 SPDIF Katie UMN ere E 8 PS HN COTM eet 8 Volume Control Conne EE 8 apat 1 CC E 9 SNE POL E 10 UG rt Lie TT wm cartes 11 Smole Ended Output CONMECHOM BE 11 Balanced Outputs Copnpecton nennen eene nnn ense sean tese n tese trees ees 12 IRM PA DERE E T 12 ido M 13 NUE Tell NB E 13 EEGEN 13 Parer DOE SE 13 PUNT LOO RR E m E P E E E 13 UMANA EL oee a E E EN E A E E AE A AA 14 lu 14 ENEE OPIDO BS abpescsboviNU NM e al m End PRIRE PII INE xs aM UIN EEM IN EEN OT D EINE 14 tee Eent We 14 IR RTR MTA NT T t 15 JACCOSSOFIBSL I cu IM OU PREDA evs ore sparse csc sci pees on ores EAEE A MEINEM IMMMU 15 KEREN 15 Soekris Engineering ApS Denmark info s2. Right Buffered Output Right channel J8 we H Single ended GND O Balanced OUT Left Buffered Output Left channel Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 12 of 18 Power Input Voltage J1 Power connector Input voltage e DC 7 to 15V DC preferable 9 12V DC AC 2x 7 8V AC Power goes though a diode bridge so polarity doesn t matter Connector is MTA156 type Power Consumption Positive Rail 0 18A 2 10V Negative Rail 0 06A 10V Total 2 4W The positive supply draw about 3 times as much current as the negative the current is almost independent of input voltage Filter built in FIRT upsampling from incoming sample rate to 352 384 Ksps in one step with different filter lenght based on incoming sample rate All FIR1 filters are basic Parks McClellan brickwall types designed with http t filter appspot com fir index html but still shorter than your regular DAC IIR bank of 15 biquads operating at 352 384 Ksps with one used for the CD de emphasis filter none otherwise used for the basic DAC FIR2 upsampling from 352 384 Ksps to 2 8 3 1 Msps reasonable short and soft but still using same design as FIR1 All filters are using 32 bit coefficients with up to 67 bit MAC accumulator Filter tool Online filter design t filter appspot com fir index html Windows filter software sourceforge net projects reph
3. or for supplying limited power to other things J2 Pin 1 GND J2 Pin 2 PWR A J2 Pin 3 PWR A J2 Pin 4 GND J2 Pin 5 PWR 5 volt J2 Pin 6 PWR 5 volt J2 Pin 7 GND J2 Pin 8 PWR 3 3 volt J2 Pin 9 PWR 1 2 volt J2 Pin 10 GND Header J3 All indputs are 3 3V level 1 2 3 3V o Q INP SLECT1 INP SLECTO o OQ PWRLED VOLUME POT Oo OQ GND SPDIF IN Oo OQ SPDIF1 IN SPDIF2 IN O OQ FPGA SLV GND O OQ FPGA MCLK OUT ISO 3 3V O OQ ISO RXD IN ISO GND O OQ ISO TXD OUT ISO GND O OQ I2S BCLK IN ISO GND O OQ I2S LRCK IN ISO GND Oo OQ I2S DAT IN ISO GND O OQ I28 MCLK OUT ISO GND Oo OQ I2S FSEL IN 25 26 Isolated 12S indput Soekris Engineering ApS e Denmark info soekris dk e www soekris dk Page 7 of 18 SPDIF Input Connections RCA JACK TRANSFORMER TJ 330 Ohm OUT c v GND VCC TOSLINK I2S Input Connections e Connect BCLK to I2S BCLK IN Pin J3 18 e Connect LRCK to I2S LRCK IN Pin J3 20 e Connect Data to 12S DAT IN Pin J3 22 e Provide external 3 3V to ISO 3 3V Pin J3 13 e AND connect I2S GND to ISO GND J3 15 Volume control connection IN GND O 3 3V To J3 pin 7 To J3 pin 8 To J2 To J2 To J3 pin 9 To J3 pin 11 To J3 pin 1 VOLUME POT SPDIF IN SPDIF2 IN 1 o o o o o o o o o o o o o 25 Requires the use of a 10K linear potentiometer Volume can be controlled 90 to 15 db Connect low side of potentiometer to GND Pi
4. IA 100 Mouser Part Number 571 6404544 Digikey Part Number A19431 ND House TE Connectivity Series MTA 100 Headers amp Wire Housings Mouser Part Number 571 13758204 Digikey Part Number A111859 ND J10 Connector 2x5 pin Mouser Part Number 571 1023871 Digikey Part Number A25901 ND P1 P2 Neutrik P N NC3MAAH Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 17 of 18 Mouser Part Number 568 NC3FXX Digikey Part Number SC1001 ND Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 18 of 18
5. ase Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 13 of 18 UMANAGER Overview The dam1021 have a small 32 bit ARM based microcontroller with a monitor for configurations and control functions over the serial port the uManager The default serial port is set for 115200 n 8 1 The uManager monitor can be entered by entering followed by a one second pause It will then write the signon message and a prompt then waiting for commands The uManager is a command line driven program for configuration and downloading new firmware Typing or Help at the command prompt will show a short list of commands available uManager Commands or Help show this help set par value set paramter to value set alone to show exit exit uManager update update uManager firmware download download and update system flash idf show ID of flash df adr dump flash content Updating firmware The dam1021 firmware can be upgraded though the serial port either in one step or you can upgrade the uManager FPGA or Filters seperately When upgrading uManager you need to also enter an update command 1 Download newest firmware version unzip as needed from www soekris dk Connect the dam1021 serial port to a PC serial port with a terminal program set for 115200 n 8 1 no handshake Enter the uManager by typing You should then get the uManager prompt Type download and start sending file from
6. matic input selection Data reclocking s w PLL with 0 02 Hz low pass filter S W interface serial interface allows 1 Volume control e g with Arduino 2 Input selection e g with Arduino 3 Loadable FIR filters including bypass filter for NOS support s w utility included 4 Firmware update upgrade Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 5 of 18 CONNECTORES AND INDICATORS at EP TES RT jus ER SS uni Lu lb ERN ib T THI VK dr e Om qa ad dH HRB e TT m E Up ES 00 de mes Wi Soekris Engineering Seit BS ar comm sits ap icc e hiihii H v ii E Sud SS D 33 E EP x CITT eS eS So dHdHnaHHHdddHr E 1 araca cacap COEAEAEAEAEAEAEAEaEAEAE d i 1 Em d D CTT TT HIT SSS SSS SS SS Sl SS Sl Sl SIS is e n x o000000 EE Less QE wegl 73 aM xt J S ICH ee ee lll el elle 4 a a at al a e e nm FAE arom momirmimimmmrm a ra D V Alt M ak ai gt cC t LI 7 amp amp SS SS SS Sc Sl Sissi ypu A m a t ES SEET 1 to N pn LS LCE A m efelelelelele i KS cum 2 Iz Zeil Le i m a mem r COB CBIR CoO RCI farma E Ce Power Connector Header J1 Power IN GND GND Power IN OO 7 8V AC or 7 15V DC max 5W Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 6 of 18 Power Rails Connector Header J2 Connector with all the power rails for testing
7. n J3 11 Connect high side of potentiometer to 3 3V Pin J3 1 Connect Volume Pot wiper to VOLUME POT Pin J3 5 INP SLECTO SPDIF IN SPDIF2 IN ISO 3 3V ISO GND ISO GND ISO GND ISO GND ISO GND ISO GND 2 2 O O O O O O o O O O O O O O o O O O O O O O O O Oo O 25 26 INP SLECT1 PWRLED GND SPDIF1 IN FPGA SLV FPGA MCLK OUT ISO RXD IN ISO TXD OUT 12S BCLK IN I2S LRCK IN I2S DAT IN I28 MCLK OUT I2S FSEL IN Soekris Engineering ApS Denmark info soekris dk e www soekris dk 2 o o o o o o o o o o o o o 26 INP SLECT1 PWRLED GND SPDIF1 IN FPGA SLV FPGA MCLK OUT ISO RXD IN ISO TXD OUT 12S MCLK OUT 12S FSEL IN Page 8 of 18 Input Selection Auto Selection open open dam1021will search the 3 inputs for a valid signal and lock when found LUS GND GND SPDIF 1 Coax open GND Sensitive LVDS Receiver SPDIF 2 Toslink GND open Standard 3 3V digital level Open means that there is nothing connected to the pin 1 2 335 OO O o O PWRLED VOLUME POT OO GND VA SPDIF IN o O SPDIF1 IN SPDIF2 IN o O FPGA SLV o O FPGA MCLK OUT ISO 3 3V o O ISO RXD IN ISO GND o oO ISO TXD OUT ISO GND o oO I2S BCLK IN ISO GND o o I2S LRCK IN ISO GND o O I2S DAT IN ISO GND o O I2S MCLK OUT ISO GND o oO I2S FSEL IN 25 26 Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 9 of 18 Serial port The dam1021
8. oekris dk e www soekris dk Page 2 of 18 INTRODUCTION The dam1021 is a DAC module based on a discrete R 2R sign magnitude DAC design with FPGA based FIFO buffering reclocking and custom digital filters lt 1 ps jitter clock generator with 28 bit resolution so there is headroom oversampling up to 3 072 Mhz Up to 24 bit 384 Khz input from SPDIF 12S and USB via USB to I2S interface board with isolation on the I2S interface The board is very flexible with digital volume control and filter parameters that can be downloaded The board is fully firmware upgradeable over a simple serial connection which enable new features later on The basis R 2R network has an output voltage of 1 4V RMS and output impedance of 625 ohm and can therefore drive a lot of things directly There is also onboard balanced output drivers that can drive high impedance gt 300 ohm headphones directly The power supply is also onboard just add a 5W or larger toroid transformer Standard Configurations dam1021 01 0 0196 resistor version dam1021 02 0 0296 resistor version dam1021 05 0 0596 resistor version What is the difference between boards using 0 01 0 02 or 0 05 resistors Only the harmonic distortion get better with more precise resistors and typically they will sound much the same as the resistors initially are better then specified But the more precise resistors has smaller temperature drift and better long term stability and theref
9. ore will be better in the long term Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 3 of 18 Specifications dam1021 series dam1021 01 02 05 THD 1 dB output 0 008 0 010 0 015 THD 60 dB output 0 03 0 05 0 09 S N 20Khz Bandwidth 127 dB unweighted Frequency Range 0 1dB 1 0dB 20hz 20Khz Signal Input Isolated 2S t ex for external USB I2S interface board SPDIF digital t ex for direct connection to Toslink receiver SPDIF balanced receiver t ex for AES3 of SPDIF Coax Audio Output R 2R direct single ended 1 4V RMS Zout 625 Ohm Buffered single ended 2V RMS Zout 10 Ohm Buffered balanced 4V RMS Zout 20 Ohm Power input 7 8V AC or 7 15V DC max 5W Environmental Conditions Operating 0 C to 60 C temperature 10 to 90 relative humidity non condensing storage 20 C to 85 C temperature 5 to 95 relative humidity non condensing Board size 3 2 x 5 8 81 x 147 mm Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 4 of 18 FEATURES The initial rev 0 90 release of the firmware together enables the following features CON DU A LO 4 ra 2S input up to 384K Hz sample rate SPDIF input up to 192K Hz Automatic De emphasis for 44 1 KHz material Built in set of simple FIR filters for all sample rates Digital volume control through simple potentiometer Auto
10. the terminal program using 1K X modem protocol If doing a full upgrade or just uManager type update Power cycle when done you can verify by entering uManager again uManager and or FPGA revision should then be updated to newest version D St a xg Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 14 of 18 USB to I2S SPDIF interface USB to I2S DSD from http www diyinhk com OEM Combo384 Module http amanero com Accessories worldwide distributor of semiconductors and electronic components Digi Key http www digikey com Mouser Electronics http www mouser com Connectors J1 TE Connectivity AMP P N 640445 4 Connector is MTA156 type House TE Connectivity AMP P N 3 640428 4 Mouser Part number 571 3 640428 4 Digikey Part number A31242 ND Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 15 of 18 J2 Molex Connector Corporation 10 pin Mouser Part Number 538 90120 0770 Digikey Part Number WM8092 ND House Molex Wire Housings series 90123 Mouser Part Number 538 90156 0150 Digikey Part Number WM8025 ND J3 Connector 2x13 pin Mouser Part Number 571 1023876 Digikey Part Number A25906 ND Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 16 of 18 J6 J7 J8 TE Connectivity Series M
11. uses a standard RS 232 level serial port on J10 for the primary console interface The serial port default baud rate is 115200 but it can be changed by the monitor set command The connected ANSI VT100 terminal or terminal emulator should be set for 115200 baud 8 databits no parity 1 stop bit no flow control Pin 3 RXD Pin 5 TXD Pin 9 GND TXD GND soekris Part Number SK 14120901 converts the serial port connector to a standard PC type 9 pins D SUB so a serial crossover cable should be used when connecting to another PC Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 10 of 18 Clocking and FIFO The DAC have a low jitter digital controlled oscillator SiLabs si570 data is sent though a short FIFO and the FPGA and uC work together to measure incoming bitrate and adjust clock as needed basically a digital PLL with very fast lock and very slow filtering So the DAC itself only need serial data word clock and bit clock no master clock is needed it will sync to whatever you feed it Single Ended Output Connection R 2R direct single ended OUT Right 1 4V RMS Zout 625 Ohm enn O GND O OUT Left RAW Output Soekris Engineering ApS Denmark info soekris dk e www soekris dk Page 11 of 18 Balanced Outputs Connection Buffered single ended 2V RMS Zout 10 Ohm Buffered balanced 4V RMS Zout 20 Ohm J6 ib E Single ended GND O Balanced OUT
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