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FDA-2A Manual.doc

Rev. 1.0

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31-Aug-2012

www.FETAudio.com

FDA-2A Manual

WM8805 Single Ended DAC

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High Fidelity 24 bit*192kS/s

Digital to Analogue Converter

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Email:

[email protected]

www.FETAudio.com

Содержание FDA-2A

Страница 1: ... www FETAudio com FDA 2A Manual AD1955 WM8805 Single Ended DAC High Fidelity 24 bit 192kS s Digital to Analogue Converter Designed By Spencer Cheung of FETAudio com Email spencer fetaudio com or skcheung68 hotmail com w w w F E T A u d i o c o m ...

Страница 2: ...ES and 1 Toslink and one I2S input with a new front panel control board The FDA 1B front control board is also usable but it only can control 3x digital input plus 1x I2S or 4x digital input without I2S input Moreover one of the two RCA socket top one on digital input section can be set to SPDIF out of WM8805 by on board jumpers It functions as a buffer and jitter filter cleaner of the selected di...

Страница 3: ...inches width 8 Board 7 1 x 8 inches double sided 1 6mm gold plated FR4 9 x M3 supporting holes max height part 35mm Total fully assembled board height is 37mm 9 The PCB layout is designed to accept both SMD and Through Hole type components for both capacitors and resistors Note that although the resistors hole is just a TH 5mm pitch but 0805 SMD parts can be soldered on to it 10 Future expansion t...

Страница 4: ...2 1u x 1 1500p x 2 5600p x 4 0 01u x 2 0 1u x 58 4 Solder the SMT crystal 12MHz Y1 on board 5 After that wash the PCB to remove all the flux with Isopropyl Alcohol Use a tooth brush to clean the gap of the ICs leads After that rinse the PCB with distilled water and dry it properly 6 Use a multi meter to check all the leads of AD1955 and WM8805 connections to the nearest connection points Ensure no...

Страница 5: ...arefully and insert into the PCB holes before soldering Do not pull the lead too hard as it may break Note there is polarity for these E caps negative at black strip or semi circle 9 Do not solder L8 and L15 nearby the AD1955 chip This is only required after checking the regulator voltage is regulating at 5Vdc in the tuning procedure 10 There are some parts that need special attentions during asse...

Страница 6: ...ward as shown below Note that there is a mica insulation sheet between the metal body of TO 220 parts IRF610 IRF9610 and LM317T and the heat sink A spring washer and plastic washer is also used for insulating the M3 screw from touching the metal body of all TO 220 parts For the other NPN and PNP transistors they do not need a mica sheet for insulation as the body is all 100 plastic w w w F E T A u...

Страница 7: ...ort Short No Output Note the orientation of the ASRC daughter board and it must be inserted like the photo below The fixing screw should be able to be aligned to the spacer hole The M3 spacer provided is 8mm height and a spring washer is provided and put below the spacer to increase the total height to about 9mm Two rows of IC pin sockets are provided and to be soldered on the main board NOS or AS...

Страница 8: ...15 5V to 16V Adjust VR8 until the voltage is 20V 0 02Vdc Remove the power applied to J59 9 Connect AC18V or a regulated power supply with current limit set to 300mA at 24Vdc to J58 check at J21 for 20V to G points The initial voltage should be around 15 5V to 16V Adjust VR7 until the voltage is 20V 0 02Vdc Remove the power applied to J58 10 Solder the 3 wires provided from J19 to J21 at the bottom...

Страница 9: ...layer with SPDIF output 20 Check the output levels for 0dBFS input signal is about 1 55Vrms at J14 T1 and T2 relative to G Left and right channel should not be more than 0 25dB differences in levels 21 Check that the distortion of the output 1KHz signal is about 0 022 for both channels 22 Burn in the DAC for an hour and go for listen test w w w F E T A u d i o c o m ...

Страница 10: ...put Socket Location Description Spec Format J4 SPDIF input x 2 Lower RCA is SPDIF1 Upper RCA is SPDIF2 or SPDIF Out Tx from WM8805 75 ohm 24bit 192k RCA vertical double deck J3 AES input 110 ohm 24bit 192k XLR female U3 Optical input Optical 24bit 192k Toslink TORX147 J5 See item 2 above 3 3V CMOS levels 5x2 pin header Note For 192k operation an ASRC daughter must be used at U18 location 4 Analogy...

Страница 11: ...trol Bus Pin Description Marking on PCB 1 DGND 2 CSB GPO2 CSB G2 3 DGND 4 SDOUT GOP7 SDOUT G7 5 DGND 6 SDIN HWMODE SDIn Hw 7 DGND 8 GPO0 SWIFMODE G0 SW 9 DGND 10 SCLK SCLK Refer to WM8805 data sheet for details 7 J20 WM8805 Digital Bus Pin Description Marking on PCB 1 DGND GND 2 DOUT SDA 3 DIN Din 4 BCLK Bclk 5 LRCLK LRck 6 MCLK Mck Refer to WM8805 data sheet for details 8 J29 WM8805 RxGx Bus Pin ...

Страница 12: ...gital Bus I2S Pin Description Marking on PCB 1 DGND GND 2 MCLK MCK 3 LRCLK LRCK 4 BCLK BCK 5 SDATA L SDA L 6 RDATA RDA Refer to AD1955 data sheet for details 11 J16 AD1955 DSD Bus Pin Description Marking on PCB 1 DGND GND 2 DGND 3 DSD_PHASE PHA 4 DGND 5 DSD_RDATA RDA 6 DGND 7 DSD_LDATA LDA 8 DGND 9 DSD_SCLK SCLK 10 DGND If DSD input is not used short the all the pins to ground Refer to AD1955 data...

Страница 13: ...are mode J50 XO In for WM8805 pin 15 connect to external low jitter XO 12Mhz crystal Y1 should be removed when external XO is used L1 L24 L1 and L24 are for 3V3 and 5V optical receiver at U3 respectively Only one of the inductor should be connected per the spec of the Toslink L10 Provide 5V to digital supply of AD1955 Should not connect if U1 is present J22 Same as J3 AES input J23 Same as J4 SPDI...

Страница 14: ...IF inputs and not provided When used J53 should be opened and R39 and R85 should not be populated J14 Channel Analogy Output T1 Right T2 Left G Ground This is for off board RCA connection J15 J17 Not used for VREF measurement points R51 R52 R50 R54 R49 R55 R43 R56 R40 R77 These resistors pairs decide the power on operation mode of WM8804 Solder only one 10k resistor for each pair Default is hardwa...

Страница 15: ... to DAC main board via 10 pin flex cable 2 J2 and J14 are the same toggle switch to select the digital input SPDIF AES Toslink and USB I2S J5 3 J20 can be connected a external Power LED Brightness can be adjusted by changing the value of R17 4 R18 D5 will indicate Mute if connected R8 should not be connected in this mode 5 R8 D5 will be power LED indicator if connected R18 should not be connected ...

Страница 16: ...B Q6 R8 CW VR1 E C B Q7 R9 R10 E C B Q8 R11 R12 R13 R14 R15 C3 C4 C5 C6 NC C7 NC D2 E C B Q1 E C B Q2 R16 R17 C81 R70 C83 NC 1 H6 1 H8 1 H5 1 H7 C57 C58 C59 C134 J19 1 J19 2 J19 3 1 G 2 SG 3 CHS 4 S1 5 S2 6 S3 J7 RCA_JF2 C208 C209 C237 HO13 HO14 HO15 HO16 C171 C177 D60 C229 C234 C235 1 2 R179 1 2 R183 1 2 R187 1 2 R191 1 2 R195 1 2 R196 1 2 R203 1 2 R207 1 2 R208 1 2 R215 1 2 R216 R223 R224 R231 1...

Страница 17: ... C B Q9 C8 R19 C9 R20 E C B Q10 R21 R22 R23 E C B Q11 R24 E C B Q12 R25 CW VR2 E C B Q13 R26 R27 E C B Q14 R28 R29 R30 R31 R32 C10 C11 C12 C13 NC C14 NC D4 E C B Q15 E C B Q16 R33 R34 C82 R71 C84 NC 1 H11 1 H9 1 H10 1 H12 C60 C66 C85 C135 C210 C211 C238 HO9 HO10 HO11 HO12 C223 C224 D61 C230 C236 C241 1 2 R180 1 2 R184 1 2 R188 1 2 R192 1 2 R197 1 2 R198 1 2 R204 1 2 R209 1 2 R210 1 2 R217 1 2 R218...

Страница 18: ...Y1 14 Y2 12 Y3 U12 A 19 OE 11 A0 13 A1 15 A2 17 A3 9 Y0 7 Y1 5 Y2 3 Y3 U12 B 2 3 1 U13 A 5 6 4 U13 B 8 9 10 U13 C 11 12 13 U13 D 1 2 3 U14 A 4 5 6 U14 B 9 10 8 U14 C 12 13 11 U14 D R90 1 2 L11 1 2 L12 J5 1 J5 2 J5 3 J5 4 J5 5 J5 6 J5 7 J5 8 J5 9 J5 10 1 2 L15 1 2 R93 1 2 R94 1 2 R95 1 2 R96 C196 C198 1 2 R64 1 2 R76 R84 1 2 R171 1 2 L10 C17 C22 C23 C24 3 IN 2 OUT 1 G 4 U1 AMS1117 5 C15 C18 C16 C44...

Страница 19: ...LK 3 BCLK 4 SDATA L 5 RDATA 6 DSD_SCLK 7 DSD_LDATA 8 DSD_RDATA 9 DSD_PHASE 10 AGND1 11 IOUTR 12 IOUTR 13 FILTR 14 IREF 28 DGND 27 MCLK 26 CCLK 25 CLATCH_BAR 24 CDATA 23 PD RST_BAR 22 MUTE 21 ZEROL 20 ZEROR 19 AGND2 18 IOUTL 17 IOUTL 16 FILTB 15 AVDD U11 1 2 R41 C43 C45 1 2 R42 1 2 R44 1 2 R47 1 2 R35 1 2 R45 C50 C19 C20 C21 J12 1 J12 2 J12 3 J12 4 J13 1 J13 2 J13 3 J13 4 J13 5 J15 1 J15 2 J13 6 J1...

Страница 20: ...3 1 2 R74 1 2 R82 C86 1 2 R83 D21 1 2 3 4 5 6 7 8 K1 EC2 12V R251 C258 E C B Q31 E C B Q33 E C B Q32 C263 J26 1 J26 2 J26 3 J26 4 J26 5 J26 6 J26 7 J26 8 J26 9 J26 10 J29 1 J29 2 J29 3 J29 4 J29 5 J29 6 J29 7 J29 8 J29 9 J29 10 1 2 R102 1 2 R103 1 2 R104 1 2 R105 2 1 3 U2 A 5 4 6 U2 B 9 10 8 U2 C 12 13 11 U2 D C89 C91 NC J32 1 J32 2 1 2 U15 A 3 4 U15 B 5 6 U15 C 9 8 U15 D 11 10 U15 E 13 12 U15 F C...

Страница 21: ...D32 G D S Q62 1 G 2 D 3 S Q63 D G S Q64 D G S Q65 D G S Q66 E C B Q67 CW VR8 3296W 1 502LF H21 H22 E C B Q68 E C B Q69 E C B Q70 E C B Q71 E C B Q72 E C B Q73 V K A D33 J21 1 J21 2 J21 3 C156 C157 1 J33 M3 1 J34 M3 1 J35 M3 1 J37 M3 1 J38 M3 1 J39 M3 1 J40 M3 1 J41 M3 1 J42 M3 1 J43 M3 1 J44 M3 1 J45 M3 1 J46 M_150MIL 1 J47 M_150MIL 1 J48 M_150MIL 1 J49 M_150MIL C139 C140 C141 C142 E B C Q75 E B C...

Страница 22: ...1 2 T1 3 T2 4 S1 5 S2 6 G2 7 S4 8 S5 J4 RCA_JF2_2 C169 1 A 2 B 3 C 4 G2A 5 G2B 6 G1 15 Y0 14 Y1 13 Y2 12 Y3 11 Y4 10 Y5 9 Y6 7 Y7 U4 Y2 J61 1 J61 2 J61 3 J62 1 J62 2 1 2 R36 1 2 R37 1 2 R38 1 2 R63 1 2 R172 C27 C90 C164 C170 C175 C176 C178 C179 C182 C183 C184 C186 C189 C190 C181 C262 1 DVDD 2 RX1 3 RX0 4 SCLK 5 GPO0 SWIFMODE 6 GPO1 7 SDIN HWMODE 8 SDOUT GPO7 9 CSB GPO2 10 RESETB 11 PVDD 12 PGND 13...

Страница 23: ...11 2 C71 R75 C77 1 2 R59 1 2 R60 1 2 R61 1 2 R62 1 2 R66 D11 D12 D13 D14 D15 D16 D17 D18 D20 1 2 L6 1 2 L7 1 2 L9 C88 H3 C51 1 G1 GND_PT D19 C76 H20 C158 3 IN 1 ADJ 2 OUT U7 C167 D34 J27 J28 J25 1 2 R149 1 2 R150 C172 D35 D36 D37 J2 J54 3 IN 1 ADJ 2 OUT U6 C72 1 2 L18 C220 C206 C207 C222 C168 J55 1 J55 2 J58 1 J58 2 J59 1 J59 2 1 2 L21 1 2 L23 1 2 R68 1 2 R69 D25 D50 D53 F1 2A Fast F2 2A Fast F3 2...

Страница 24: ...OG Murata or TDK 2 20 C28 29 15p 50V COG Murata or TDK 2 21 C26 1u 6 3V X7R Walsin or Samsung 1 21 C26 1u 6 3V X7R Walsin or Samsung 1 22 C86 C168 470pF 50V X7R Walsin or Samsung 2 23 C234 236 C241 5600p 50V COG Murata or TDK 4 24 C250 NC Walsin or Samsung 0 25 C71 10000u 16V NCC KMH or Panasonic SU 22 25mm 1 26 C17 C64 C69 C162 100u 6 3V to 10V 5mm Panasonic FK or FC 4 27 C4 5 C11 12 C76 C81 82 C...

Страница 25: ... 2 62 L2 L8 Bead Hualida 2 63 L3 7 L11 12 L15 L21 L23 Bead Hualida 10 64 L24 NC Hualida 0 65 Q62 IRF610 IR or Vishay 1 66 Q63 IRF9610 IR or Vishay 1 66 Q63 IRF9610 IR or Vishay 1 67 Q93 96 K30A Y Toshiba 4 68 D25 D50 D53 LED TH Green China Source 3 69 D32 33 LM336 5V Fairchild 2 70 U6 7 LM317T ST 2 71 U8 U10 U17 1117 3 3V AMS 3 72 U1 NC AMS 0 73 J6 7 RCA H white red JF 2 74 J14 NC JF 0 75 J4 RCA V...

Страница 26: ...R14 R31 33R2 Xicon 271 2 104 R6 R23 3k32 Xicon 271 2 105 R4 5 R21 22 R86 475R Vishay MRS25 5 106 R3 R20 47k Xicon 271 2 107 R1 2 R18 19 562R Vishay MRS25 4 108 R9 R11 R26 R28 82R5 Xicon 271 4 109 K1 EC2 12V NEC EC2 Pana HX2 1 110 U3 TORX147L TOSHIBA or Everlight 1 111 VR1 2 500R 10T Sichun 2 112 VR7 8 5k 10T Sichun 2 112 VR7 8 5k 10T Sichun 2 113 U9 WM8805 Wolfson 1 114 J3 NC3FAA H2 Neutrik 1 115 ...

Страница 27: ... J1 2x5 2 5mm male connector China 1 8 J2 1x2 socket 2 54mm white China 1 9 U3 FM1106 Ramtron 1 10 D1 4 D6 7 LED Green TH China 6 11 D8 NC China 1 12 D5 LED Red TH China 1 13 R1 R6 R9 47k 1 Walsin or ASJ 3 14 R2 5 R8 R15 680R 1 Walsin or ASJ 6 15 FP V7 1 pcb FP V7 1 pcb FETAUDIO 1 16 Flat cable 10 wires w plug 12 inches 10 wire flat cable Length 12 inches 1 17 5x2 2 54mm plug 5x2 header plug China...

Страница 28: ...omment 1 1 Red Solid 1 Fft Ch 1 Ampl Left 44 1k 0dbFS 1 2 Magenta Solid 1 Fft Ch 2 Ampl Left 170 10 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 d B r A 20 20k 50 100 200 500 1k 2k 5k 10k Hz w w w F E T A u d i o c o m 0dBFS at 1kHz All measurement use 44 1k Fs 0dB 1 55Vrms with 100k load ...

Страница 29: ...eep Trace Line Style Thick Data Axis Comment 1 1 Red Solid 1 Fft Ch 1 Ampl Left 10dbFS 1 2 Magenta Solid 1 Fft Ch 2 Ampl Left 170 10 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 d B r A 20 20k 50 100 200 500 1k 2k 5k 10k Hz w w w F E T A u d i o c o m 10dBFS ...

Страница 30: ...ne Style Thick Data Axis Comment 1 1 Red Solid 1 Fft Ch 1 Ampl Left 60dbFS 1 2 Magenta Solid 1 Fft Ch 2 Ampl Left 170 10 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 d B r A 20 20k 50 100 200 500 1k 2k 5k 10k Hz w w w F E T A u d i o c o m 60dBFS very clean noise floor ...

Страница 31: ...Data Axis Comment 1 1 Red Solid 1 Fft Ch 1 Ampl Left 60dbFS 100k BW 1 2 Magenta Solid 1 Fft Ch 2 Ampl Left 170 0 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 d B r A 20 100k 50 100 200 500 1k 2k 5k 10k 20k 50k Hz w w w F E T A u d i o c o m 60dBFS with 100k Bandwidth very clean noise floor ...

Страница 32: ...id 1 Anlr THD N Ratio Right 1 3 Yellow Solid 1 Anlr Level B Left 1 4 Red Solid 1 Anlr THD N Ratio Right 0 001 0 1 0 002 0 005 0 01 0 02 0 05 5 5 4 5 4 3 5 3 2 5 2 1 5 1 0 5 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 d B r A 20 20k 50 100 200 500 1k 2k 5k 10k Hz w w w F E T A u d i o c o m Frequency response and distortion vs frequency Frequency Response Distortion vs Frequency ...

Страница 33: ...a Solid 1 Anlr THD N Ratio Right 1 3 Yellow Solid 1 Anlr Level B Left 1 4 Red Solid 1 Anlr THD N Ratio Right 0 001 20 0 002 0 005 0 01 0 02 0 05 0 1 0 2 0 5 1 2 5 10 100 5 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 d B r A 120 0 110 100 90 80 70 60 50 40 30 20 10 dBFS w w w F E T A u d i o c o m Input and output levels Distortion vs Input levels ...

Страница 34: ...Line Style Thick Data Axis Comment 1 1 Red Solid 1 Fft Ch 1 Ampl Left IMD 19k and 20k 1 2 Magenta Solid 1 Fft Ch 2 Ampl Left 160 0 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 d B r A 2k 24k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k Hz w w w F E T A u d i o c o m IMD 19k and 20k ...

Страница 35: ...omment 1 1 Red Solid 1 Fft Ch 1 Ampl Left 10mUI 1 2 Magenta Solid 1 Fft Ch 2 Ampl Left 160 0 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 d B r A 2k 24k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k Hz w w w F E T A u d i o c o m Jitter rejection 10mUI 1kHz at 18k signal Cannot see any signal excellent rejection ...

Страница 36: ...lid 1 Fft Ch 1 Ampl Left 100mUI 1 2 Magenta Solid 1 Fft Ch 2 Ampl Left 160 0 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 d B r A 2k 24k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k Hz w w w F E T A u d i o c o m Jitter 100mUI 1k at 10k signal 2nd harmonic distortion of 10k signal Cannot see any jitter signal excellent rejection ...

Страница 37: ...w w w F E T A u d i o c o m w w w F E T A u d i o c o m Master Clock 37 2ps Fs 174 6pS Bit Clock 210pS Input at SPDIF1 measured at J13 bus near to AD1955 input ...

Страница 38: ...w w w F E T A u d i o c o m w w w F E T A u d i o c o m ...

Страница 39: ...w w w F E T A u d i o c o m w w w F E T A u d i o c o m ...

Страница 40: ...w w w F E T A u d i o c o m ...

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