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FETAudio FDA-2A Manual - C. Assembly Instruction

Manual is about: FETAudio AD1955+WM8805 Single Ended DAC

Summary of FDA-2A

  • Page 1

    Fda-2a manual.Doc rev. 1.0 page 1 31-aug-2012 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:...

  • Page 2: A. Introduction:

    Fda-2a manual.Doc rev. 1.0 page 2 31-aug-2012 a. Introduction: fda-2a ad1955+wm8805 dac use the same “super sound discrete iv converter” of fda-1b. The main difference is the change of the main dac chip from texas instruments pcm1794a to analogy devices ad1955 in single ended output mode. The second...

  • Page 3: B. Specifications:

    Fda-2a manual.Doc rev. 1.0 page 3 31-aug-2012 b. Specifications: 1. Dac chip ad1955 and receiver chip wm8805 plus the discrete super sound iv converter in pure class “a” operation. 2. On board full power supplier regulations for the dac to work in standalone hardware mode with 4 digital inputs (2 sp...

  • Page 4: C. Assembly Instruction

    Fda-2a manual.Doc rev. 1.0 page 4 31-aug-2012 c. Assembly instruction 1. Please take necessary esd precautions, as all the parts are esd sensitive! 2. Solder all smd ic: ad1955, wm8805, 74 series ics, and ams1117, align the markings of the parts with the text on the pcb screen-printing. 3. Solder al...

  • Page 5

    Fda-2a manual.Doc rev. 1.0 page 5 31-aug-2012 7. Solder the rest of the parts starting from the smallest parts first, preferably also by component type and by component value. For example, beads ( except l8 and l15 ), pin headers, pulse transformer, relays, resistors, leds, diodes, small e-caps and ...

  • Page 6

    Fda-2a manual.Doc rev. 1.0 page 6 31-aug-2012 10.3. Do not connect the 3 wires at j19 and j21. Refer to the tuning procedure for details. 10.4. Install all transistors into heat-sink with their markings all facing upward as shown below. Note that there is a mica insulation sheet between the metal bo...

  • Page 7

    Fda-2a manual.Doc rev. 1.0 page 7 31-aug-2012 10.5. If asrc daughter board module is used, the output sample frequency fs can be set as below: asrc chip j15 j16 sample frequency src4192 open open 96k (recommended) src4192 open short 48k src4192 short open 192k (no output) src4192 short short no outp...

  • Page 8

    Fda-2a manual.Doc rev. 1.0 page 8 31-aug-2012 d. Tuning and testing procedures: 1. With all the parts in place except the 3 wires, l8 and l15, insert the nos daughter board in place (u18). 2. Connect ac 9v (or a regulated power supply with current limit set to 200ma at 12vdc) to j55 (do not connect ...

  • Page 9

    Fda-2a manual.Doc rev. 1.0 page 9 31-aug-2012 19. Connect a 1khz digital signal to the spdif1 input (lower rca socket). A test cd recorded with 1khz can be used with a cd player with spdif output. 20. Check the output levels for 0dbfs input signal is about 1.55vrms at j14 t1 and t2 relative to g. Le...

  • Page 10

    Fda-2a manual.Doc rev. 1.0 page 10 31-aug-2012 e. Board interface specifications: 1. Power supply connectors: location description format j58 18v to 20v ac, 0.8a, 14va 3.96mm pitch (5mm also provided) j59 18v to 20v ac, 0.8a, 14va 3.96mm pitch (5mm also provided) j55 8 to 9v ac, 1.2a, 12va 3.96mm pi...

  • Page 11

    Fda-2a manual.Doc rev. 1.0 page 11 31-aug-2012 5 dgnd 6 usb led drive from pin 1 of j24 (no current limit) and pin 5 of j5 (with resistor r121=680r current limit). Usb 7 +3v3 supply from u8 8 lock led drive (with resistor 680r current limit) lock = un-mute 9 +3v3 supply from u8 10 mute led drive (wi...

  • Page 12

    Fda-2a manual.Doc rev. 1.0 page 12 31-aug-2012 9. J12 – ad1955 control bus (spi): pin description marking on pcb 1 dgnd gnd 2 cclk cclk 3 clatch-bar latch 4 cdata cdata 5 zerol zerol 6 zeror zeror refer to ad1955 data sheet for details 10. J13 – ad1955 digital bus (i2s): pin description marking on p...

  • Page 13

    Fda-2a manual.Doc rev. 1.0 page 13 31-aug-2012 12. Jumpers, resistor and pin header description: location description r53/r88 short one of these resistors; r88 = i2s mute at j5 pin 9 is active high; r53 = i2s mute is active low. Default is r88 short (active high). R171 if shorted, then the i2s mute ...

  • Page 14

    Fda-2a manual.Doc rev. 1.0 page 14 31-aug-2012 groups of pads are provided. Example: h09 & h10 are the same points, and h11 & h12 are the same points. Thus connect a film capacitor from h09 to h11 and/or h10 to h12. Other connections are {h013 to h015, h014 to h016}. U18 a nos daughter board will be...

  • Page 15: G. Attachments:

    Fda-2a manual.Doc rev. 1.0 page 15 31-aug-2012 f. Front panel control board (v7.1): the front panel control board version 7.1 will control the counting of two digits, that is choice of 4 inputs. In fda-2a, it can be set to use either 4 digital input (2 x spdif, aes & optical) or 3 digital input (spd...

  • Page 16

    Spencer cheung 2012-08-15 2012-08-15 3 1955v3 fda-2a-5 fda-2a (ad1955 + wm8805) spencer cheung www.Fetaudio.Com 1 ltr c b a c d 6 5 4 3 2 1 date: d b a eco no: approved: revision record scale: sheet: of drawing no: title: company: released: dated: dated: quality control: checked: dated: dated: drawn...

  • Page 17

    3 ltr c b a c d 6 5 4 3 2 1 date: d b a eco no: approved: revision record scale: sheet: of drawing no: title: company: released: dated: dated: quality control: checked: dated: dated: drawn: code: size: rev: 8 2 1:1 fda-2a-5 b 1955v3 fda-2a (ad1955 + wm8805) 2012-08-15 2012-08-15 spencer cheung spenc...

  • Page 18

    1955v3 3 fda-2a-5 ltr c b a c d 6 5 4 3 2 1 date: d b a eco no: approved: revision record scale: sheet: of drawing no: title: company: released: dated: dated: quality control: checked: dated: dated: drawn: code: size: rev: 8 3 1:1 b fda-2a (ad1955 + wm8805) 2012-08-15 2012-08-15 spencer cheung spenc...

  • Page 19

    3 ltr c b a c d 6 5 4 3 2 1 date: d b a eco no: approved: revision record scale: sheet: of drawing no: title: company: released: dated: dated: quality control: checked: dated: dated: drawn: code: size: rev: 8 4 1:1 fda-2a-5 b 1955v3 fda-2a (ad1955 + wm8805) 2012-08-15 2012-08-15 spencer cheung spenc...

  • Page 20

    3 2012-08-15 2012-08-15 1955v3 fda-2a-5 ltr c b a c d 6 5 4 3 2 1 date: d b a eco no: approved: revision record scale: sheet: of drawing no: title: company: released: dated: dated: quality control: checked: dated: dated: drawn: code: size: rev: 8 5 1:1 b fda-2a (ad1955 + wm8805) spencer cheung spenc...

  • Page 21

    1955v3 3 spencer cheung spencer cheung 2012-08-15 2012-08-15 www.Fetaudio.Com fda-2a (ad1955 + wm8805) b fda-2a-5 1:1 6 8 rev: size: code: drawn: dated: dated: checked: quality control: dated: dated: released: company: title: drawing no: sheet: of scale: revision record approved: eco no: a b d date:...

  • Page 22

    2012-08-15 2012-08-15 fda-2a (ad1955 + wm8805) fda-2a-5 3 1955v3 ltr c b a c d 6 5 4 3 2 1 date: d b a eco no: approved: revision record scale: sheet: of drawing no: title: company: released: dated: dated: quality control: checked: dated: dated: drawn: code: size: rev: 8 7 1:1 b spencer cheung spenc...

  • Page 23

    Fda-2a-5 3 1955v3 2012-08-15 2012-08-15 1:1 ltr c b a c d 6 5 4 3 2 1 date: d b a eco no: approved: revision record scale: sheet: of drawing no: title: company: released: dated: dated: quality control: checked: dated: dated: drawn: code: size: rev: 8 8 b fda-2a (ad1955 + wm8805) spencer cheung spenc...

  • Page 24

    1955v3_1bom/bom for manual page 1 of 3 item reference value manufacturer qty 1 q1-2 q7-8 q13-16 ksa1220ays fairchild 8 2 q17-18 q31-34 ksc1815 fairchild 6 3 q3-6 q9-12 ksc2690ays fairchild 8 4 t1 51698-lf3 midcom 1 5 t2-3 nc midcom 0 6 u14 74hc00d fairchild, nxp or ti 1 7 u13 74hc02d fairchild, nxp ...

  • Page 25

    1955v3_1bom/bom for manual page 2 of 3 item reference value manufacturer qty 43 j32 j53 2x1 male hd with jumper shorted china source 2 44 j55 j58-59 2x3.96mm male connetor china source 3 45 j22 j61 3x1 male hd china source 2 46 j19 j21 150mm con wire china source 3 47 j12-13 j20 6x1 male hd china so...

  • Page 26

    1955v3_1bom/bom for manual page 3 of 3 item reference value manufacturer qty 89 r65 r67 r75 r79-80 r84 r90 r109-113 r117 r119 r136-137 47k xicon 271- 16 90 r59 r83 4k7 xicon 271- 2 91 r72 r87 r116 r138-139 4k7 xicon 271- 5 92 r64 r76 r142-143 r120-121 680r xicon 271- 6 93 r78 r148 75r xicon 271- 2 9...

  • Page 27

    1955v3_1bom/fp_v7_1_bom page 1 of 1 item reference value manufacturer qty 1 u2 74hc14d texas instruments or nxp 1 2 u1 74hc138d texas instruments or nxp 1 3 u4 74hc191d texas instruments or nxp 1 4 c2-c5 0.1u 50v yageo, walsin or samsung 4 5 c1 c8 1u 6.3v yageo, walsin or samsung 2 6 c7 c9 100u 16v ...

  • Page 28

    Fet audio 09/13/12 17:29:23 d-a fft dac 1955 se.At27 color sweep trace line style thick data axis comment 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...

  • Page 29

    Fet audio 09/13/12 17:34:09 d-a fft dac 1955 se -10dbfs.At27 color sweep 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...

  • Page 30

    Fet audio 09/13/12 17:35:20 d-a fft dac 1955 se -60dbfs.At27 color sweep trace line 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...

  • Page 31

    Fet audio 09/13/12 17:48:10 d-a fft dac 1955 bw 100k -60db.At27 color sweep trace line style thick 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 20 100...

  • Page 32

    Fet audio 09/13/12 17:42:27 d-a fft dac 1955 freq respon.At27 color sweep trace line style thick data axis comment 1 1 red solid 1 anlr.Level a left 1 2 magenta 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 0.1 0.002 0.005 0.01 0.02 ...

  • Page 33

    Fet audio 09/13/12 17:41:29 d-a fft dac 1955 dist vs level.At27 color sweep trace line style thick data axis comment 1 1 red solid 1 anlr.Level a left 1 2 magenta 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...

  • Page 34

    Fet audio 09/13/12 17:43:44 d-a fft dac 1955 imd 19_20k.At27 color sweep trace 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 8...

  • Page 35

    Fet audio 09/13/12 17:46:15 d-a fft dac 1955 jitter 10mui.At27 color sweep trace line style thick data axis comment 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 12...

  • Page 36

    Fet audio 09/13/12 17:47:15 d-a fft dac 1955 jitter 100mui.At27 color sweep trace line style thick data axis comment 1 1 red solid 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 ...

  • Page 37

    Www.Fetaudio.Com www.Fetaudio.Com master clock: 37.2ps fs: 174.6ps bit clock: 210ps input at spdif1, measured at j13 bus near to ad1955 input.

  • Page 38

    Www.Fetaudio.Com www.Fetaudio.Com.

  • Page 39

    Www.Fetaudio.Com www.Fetaudio.Com.

  • Page 40

    Www.Fetaudio.Com.