asahi kasei [AKD4395] 1 2000/7 general description the AKD4395 is an evaluation board for ak4395, which is 192khz sampling 24bit ds dac. the AKD4395 includes a lpf which can add differential analog outputs from the ak4395 and also has a digital interface with akms wave generator using rom data and akms adc evaluation boards. therefore, it is easy to evaluate the ak4395. < ordering guide AKD4395 rev.c --- evaluation board rev.c for ak4395: differential output function < on-board differential output buffer circuit < on-board clock generator < bnc connector for an external clock input < compatible with 3types of interface 1. direct interface with evaluation boards for akms a/d converter (akd539x, akd535x) 2. interface with a signal generator (akd43xx) 3. on-board cs8414 as dir which accepts optical input. 10pin header external clock rom data or a/d input optical input cs8414 (dir) clock generator ak4395 2nd order lpf rch lch fig.1 block diagram * circuit diagram and pcb layout are attached at the end of this manual. (AKD4395 rev.c is same as akd4393 rev.c.) evaluation board rev.c for ak4395 AKD4395
asahi kasei [AKD4395] 2 2000/7 < external analog circuit (rev.c) the differential output circuit and lpf is implemented on board. the differential outputs of ak4395 is buffered by non-inverted circuit and output via cannon connector(differential output). lpf adds differential outputs. njm5534d is used for op-amp on thi s board that has low noise and high voltage torelance characteristics. analog signal is output via cannon and bnc connectors on the board. the output level is about 2.73vrms (typ@vref=5.0v) by cannon and 2vrms (typ@vref=5.0v) by bnc. 300 100u 300 aoutl- 560 6.8n 330 200 6.8n 6 4 3 2 7 10u 0.1u 0.1u 10u 10u njm5534d 300 100u 300 aoutl+ 560 6.8 330 200 6.8n 6 4 3 2 7 10u 0.1u 0.1u 10u njm5534d 3 2 1 100 100 0.1u + njm5534d 0.1u 10u 100 4 3 2 .2.2n 620 620 470 7 + + + + - + - + + + - + + 2.2n lch -15 +15 6 470 fig.2 external analog filter < operation sequence 1. set up the jumpers for power supply. [jp15(reg)] selects power supply for avdd pin of ak4395. short: 5v is supplied from regulator. (default) nothing should be connected to a5v jack. open: 5v is supplied from a5v. 2. set up the power supply lines. +15v=15v, -15v=-15v: power supply for op-amp. avdd of ak4395 is supplied from +15v through regulator (jp15: short). a5v=5v: this jack is used when avdd of ak4395 is supplied from this. in this case, jp15 should be open. dvdd=5v: power supply for logic circuit on this board. vp=3v ~ 5.25v: digital (set jp10 to vp), agnd=dgnd=0v . each supply line should be distributed from the power unit. 3. set up the evaluation modes by jumper pins and dip switches.(see next item.) 4. power on.(the ak4395 should be reset once by bringing pd "l" upon power-up.) *sw1 resets the ak4395 during operation. the ak4395 is reset at sw1="l" and exits resetting at sw1="h".
asahi kasei [AKD4395] 3 2000/7 < the evaluation modes and corresponding jumper pins setting 1. evaluation modes applicable evaluation mode (1) dir(optical link) (2) ideal sine wave generated by rom data (3) using ad converted data (4)all interface signals including master clock are fed externally. (1) dir(optical link) (default) port2 is used for the evaluation using such as cd test disk. the dir generates mclk, bick and lrck sdata from the received data through optical connector(port2: torx176). fig.3 jumper set-up (dir) (2) ideal sine wave generated by rom data digital signal generated by akd43xx are used. port1 is used for the interface with akd43xx. master clock is sent from AKD4395 to akd43xx then lrck, bick and sdata are sent from akd43xx to AKD4395. jp7 sd jp6 lr xtl/ext dir jp5 bi xtl/ext dir clk jp9 dir ext xtl jp8 ckdiv1 2x 1x jp4 bcp inv thr jp2 c s 8414 vdd gnd jp1 jp14 ckdiv2 1/2x 1x xtl fig.4 jumper set-up (rom data) jp7 sd jp6 lr xtl/ext dir jp5 bi xtl/ext dir clk jp9 dir ext xtl jp4 jp8 ckdiv1 2x 1x bcp inv thr bcp inv thr (others) (msb justified) jp2 cs8414 vdd gnd jp1 jp14 ckdiv2 1/2x 1x xtl
asahi kasei [AKD4395] 4 2000/7 (3) using ad converted data ad converted data from akms ad evaluation boards(akd539x, akd535x) is used through port1. * in case of using external clock through a bnc connector, select ext of jp9 and short jp1. * in case of using the double speed sampling mode, select 1/2x of jp8 and set s2-2(dfs) on. jp7 sd jp6 lr xtl/ext dir jp5 bi xtl/ext dir clk jp9 dir ext xtl jp8 ckdiv1 2x 1x jp4 bcp inv thr jp2 c s 8414 vdd gnd jp1 jp14 ckdiv2 1/2x 1x xtl fig.5 jumper set-up (a/d) (4) all interface signals including master clock are fed externally. under the following set-up, mclk, lrck and sclk signals needed for the d/a to operate could be fed through port1. jp7 sd jp6 lr xtl/ext dir jp5 bi xtl/ext dir clk jp9 dir ext xtl jp8 ckdiv1 2x 1x jp4 bcp inv thr jp2 c s 8414 vdd gnd jp1 jp14 ckdiv2 1/2x 1x xtl fig.6 jumper set-up (ext.) 2. mclk set-up when the lrck is fed from the 74hc4040 on the board, the ratio of mclk to lrck can be selected by jp8 and jp14. jp14 jp8 x'tal mclk fs mclk/lrck 1x 1x 12.288mhz 12.288mhz 48khz 256 1x 2x 24.576mhz 24.576mhz 48khz 512 1/2x 1x 24.576mhz 12.288mhz 96khz 128 1/2x 2x 49.152mhz 12.288mhz 96khz 128 table.1 set-up example 3. bick set-up when bick is supplied from u1(74hc4040), either 32fs or 64fs could be selected. fig.8 shows 64fs mode. 64fs mode is recommended. *only mode 0(lsb justified 16bit mode) can correspond to 32fs. fig.7 jumper set-up (bcs) jp3 bcs 64 32
asahi kasei [AKD4395] 5 2000/7 4. dip switch set-up confirm the set-up of the dip switch before the operation. on means h and off means l. 4-1.system clock there are two methods to set mclk frequency. in manual setting mode (acks = 0: register 00h), the sampling speed is set by dfs0/1(table 1,4). cks0/1/2 set the frequency of mclk at each sampling speed (table 2,5). in auto setting mode (acks = 1: default), as mclk frequency is detected automatically (table 9), and the internal master clock becomes the appropriate frequency, it is not necessary to set dfs0/1 and cks0/1/2. in parallel mode, cks2 and dfs1 are fixed to 0. all external clocks (mclk, bick and lrck) should always be present whenever the ak4395 is in normal operation mode (pd = h). if these clocks are not provided, the ak4395 may draw excess current because the device utilizes dynamic refreshed logic internally. if the external clocks are not present, the ak4395 should be in the power-down mode (pdn = l) or in the reset mode (rstn = 0). after exiting reset at power-up etc., the ak4395 is in power-down mode until mclk and lrck are input. parallel mode : dfs0 (sw3-1) sampling rate (fs) off normal speed mode 30khz~54khz default on double speed mode 60khz~108khz table 1.sampling speed (manual setting mode) note: dfs1(register 00h) can be set at only serial mode. mode acks (sw4-3) cks1 (sw4-2) cks0 (sw4-1) normal double quad 0 off off off 256fs 128fs n/a default 1 off off on 256fs 256fs n/a 2 off on off 384fs 192fs n/a 3 off on on 384fs 384fs n/a *on * * 512fs /768fs 256fs /384fs 128fs /192fs table 2. master clock (manual setting mode) note: when acks is on, auto setting mode is enabled.
asahi kasei [AKD4395] 6 2000/7 serial mode : cad0 (sw3-1) dzfr (sw4-3) cad1 (sw4-2) dzfl (sw4-1) off off off off default table 3. set up of sw3-1 and sw4 note: sw4-1 and sw4-3 must be always off. sw3-1 and sw4-2 are chip addresses of up i/f. dfs1 dfs0 sampling rate (fs) off off normal speed mode 30khz~54khz default off on double speed mode 60khz~108khz on off quad speed mode 120khz~216khz table 4. sampling speed (manual setting mode) mode cks2 cks1 cks0 normal double quad 0 off off off 256fs 128fs n/a default 1 off off on 256fs 256fs n/a 2 off on off 384fs 192fs n/a 3 off on on 384fs 384fs n/a 4 on off off 512fs 256fs 128fs 5 on off on 512fs n/a n/a 6 on on off 768fs 384fs 192fs 7 on on on 768fs n/a n/a table 5. master clock (manual setting mode) note: the master clock at quad speed support only 128fs or 192fs.
asahi kasei [AKD4395] 7 2000/7 rck mclk bick fs 256fs 384fs 512fs 768fs 64fs 32.0khz 8.1920mhz 12.288mhz 16.3840mhz 24.576mhz 2.0480mhz 44.1khz 11.2896mhz 16.9344mhz 22.5792mhz 33.8688mhz 2.8224mhz 48.0khz 12.2880mhz 18.4320mhz 24.5760mhz 36.8640mhz 3.0720mhz table 6. system clock example (normal speed mode @manual setting mode) lrck mclk bick fs 128fs 192fs 256fs 384fs 64fs 88.2khz 11.2896mhz 16.9344mhz 22.5792mhz 33.8688mhz 5.6448mhz 96.0khz 12.2880mhz 18.4320mhz 24.5760mhz 36.8640mhz 6.1440mhz table 7. system clock example (double speed mode @manual setting mode) lrck mclk bick fs 128fs 192fs 64fs 176.4khz 22.5792mhz 33.8688mhz 11.2896mhz 192.0khz 24.5760mhz 36.8640mhz 12.2880mhz table 8. system clock example (quad speed mode @manual setting mode) mclk sampling speed 512fs 768fs normal 256fs 384fs double 128fs 192fs quad table 9. sampling speed (auto setting mode) lrck mclk (mhz) fs 128fs 192fs 256fs 384fs 512fs 768fs sampling speed 32.0khz - - - - 16.3840 24.5760 44.1khz - - - - 22.5792 33.8688 48.0khz - - - - 24.5760 36.8640 normal 88.2khz - - 22.5792 33.8688 - - 96.0khz - - 24.5760 36.8640 - - double 176.4khz 22.5792 33.8688 - - - - 192.0khz 24.5760 36.8640 - - - - quad table 10. system clock example (auto setting mode)
asahi kasei [AKD4395] 8 2000/7 4-2. set-up of sw 3,(mode set-up of ak4395: see the datasheet of ak4395) mode dif2 (sw3-2) dif1 (sw3-3) dif0 (sw3-4) mode bick 0 off off off 0: 16bit lsb justified 3 32fs 1 off off on 1: 20bit lsb justified 3 40fs 2 off on off 2: 24bit msb justified 3 48fs 3 off on on 3: i 2 s compatible 3 48fs 4 on off off 4: 24bit lsb justified 3 48fs (default) table 11. audio serial interface format select pins (sw3-2,3,4) 4-3.set-up of sw6(mode set-up of cs8414. about details, see the datasheet of cs8414) adjust the audio format of cs8414(dir) to ak4395. cs8414 does not match the lsb justified 20bit/24bit mode of ak4395. m3 (sw6-2) m2 (sw6-3) m1 (sw6-4) m0 (sw6-5) format jp4 off off off off 24bit msb justified inv off off on off i 2 s compatible thr off on off on 16bit lsb justified thr (default) table 12. set-up sw6 sw6-1(sel) :usually on. sw6-6(cs12): select the channel for indicating the channel status. on: rch, off: lch(default) 5. parallel/serial control sw5: set up p/s pin of ak4395. h: parallel mode. nothing should be connected to port3. jp11, 12 and 13 should be short. l: serial mode. port3 is used. jp11, 12 and 13 should be open. sw4-1 and sw4-3 must be off. 6. other set-up sw1: reset of ak4395. select "h" during operation. sw2: soft-mute of ak4395. the soft-mute is executed during sw2 pushed. le1 : this led shows pre-emphasis status. it turns on when the data is pre-emphasized. le2 : this led shows the output of verf pin in cs8414. it turns on when the error is occured in cs8414.
asahi kasei [AKD4395] 9 2000/7 < ak4395 measurement example conditions: avdd =dvdd= 5.0v (avdd is supplied by regulator) interface = dir (44.1khz, 96khz) mclk = 256fs(fs=44.1khz, 96khz) bick = 64fs fs = 44.1khz, 96khz, input data = 24bit room temperature measurement unit: audio precision system two cascade (fs=44.1khz, 96khz) fs=44.1khz parameter input signal measurement filter lch rch s/(n+d) 1khz, 0db 20klpf 102.0db 102.1db 20klpf 116.9db 116.8db dr 1khz, -60db 22klpf, a-weighted 119.2db 119.2db 20klpf 117.8db 117.8db s/n no signal 22klpf, a-weighted 120.1db 120.1db fs=96khz parameter input signal measurement filter lch rch s/(n+d) 1khz, 0db 40klpf 100.0db 100.0db 40klpf 114.4db 114.4db dr 1khz, -60db 80klpf, a-weighted 119.9db 119.5db 40klpf 114.6db 114.4db s/n no signal 80klpf, a-weighted 119.7db 119.5db
asahi kasei [AKD4395] 10 2000/7 ( fs=44.1khz) akm ak4395 fft (input level=0dbfs, fin=1khz) -160 +0 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz fft (1khz, 0dbfs input) akm ak4395 fft (input level=-60dbfs, fin=1khz) -160 +0 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz fft (1khz, -60dbfs input)
asahi kasei [AKD4395] 11 2000/7 ( fs=44.1khz) akm ak4395 fft (no ise floor) -160 +0 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz fft (noise floor) akm ak4395 fft (out-of -band noise) -160 +0 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 90 100k 200 500 1k 2k 5k 10k 20k 50k hz fft (out-of-band noise)
asahi kasei [AKD4395] 12 2000/7 ( fs=44.1khz) akm ak4395 thd + n vs amp litude (fin=1khz) -130 -60 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 d b r a -150 +0 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs thd+n vs input level (fin=1khz) akm ak4395 thd + n vs input frequency (input level=0dbfs) -110 -90 -109 -108 -107 -106 -105 -104 -103 -102 -101 -100 -99 -98 -97 -96 -95 -94 -93 -92 -91 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz thd+n vs fin (input level=0dbfs)
asahi kasei [AKD4395] 13 2000/7 ( fs=44.1khz) akm ak4395 lin earity (fin=1khz) -150 +0 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a -150 +0 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs linearity (fin=1khz) akm ak4395 f requency response -0.5 +0.5 -0.45 -0.4 -0.35 -0.3 -0.25 -0.2 -0.15 -0.1 -0.05 +0 +0.05 +0.1 +0.15 +0.2 +0.25 +0.3 +0.35 +0.4 +0.45 d b r b 20 20k 50 100 200 500 1k 2k 5k 10k hz frequency response (input level=0dbfs)
asahi kasei [AKD4395] 14 2000/7 ( fs=44.1khz) akm ak4395 f requency response -150 -100 -147.5 -145 -142.5 -140 -137.5 -135 -132.5 -130 -127.5 -125 -122.5 -120 -117.5 -115 -112.5 -110 -107.5 -105 -102.5 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz cross-talk (input level=0dbfs)
asahi kasei [AKD4395] 15 2000/7 ( fs=96khz) akm ak4395 fft (input level=0dbfs, fin=1khz, notch on) -160 +0 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 40 40k 50 100 200 500 1k 2k 5k 10k 20k hz fft (1khz, 0dbfs input, notch=no) akm ak4395 fft (input level=-60dbfs, fin=1khz) -160 +0 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 40 40k 50 100 200 500 1k 2k 5k 10k 20k hz fft (1khz, -60dbfs input)
asahi kasei [AKD4395] 16 2000/7 akm ak4395 fft (input level=-60dbfs, fin=1khz) -160 +0 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 40 40k 50 100 200 500 1k 2k 5k 10k 20k hz fft (noise floor)
asahi kasei [AKD4395] 17 2000/7 ( fs=96khz) akm ak4395 thd + n vs amp litude (fin=1khz) -120 -90 -118 -116 -114 -112 -110 -108 -106 -104 -102 -100 -98 -96 -94 -92 d b r a -150 +0 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs thd+n vs input level (fin=1khz) akm ak4395 thd + n vs e (input le vel=0dbfs) -110 -80 -108 -106 -104 -102 -100 -98 -96 -94 -92 -90 -88 -86 -84 -82 d b r a 40 40k 50 100 200 500 1k 2k 5k 10k 20k hz thd+n vs fin (input level=0dbfs)
asahi kasei [AKD4395] 18 2000/7 ( fs=96khz) akm ak4395 lin earity(fin=1khz) -150 +0 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a -150 +0 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs linearity (fin=1khz) akm ak4395 f requency response -0.5 +0.5 -0.45 -0.4 -0.35 -0.3 -0.25 -0.2 -0.15 -0.1 -0.05 +0 +0.05 +0.1 +0.15 +0.2 +0.25 +0.3 +0.35 +0.4 +0.45 d b r b 40 40k 50 100 200 500 1k 2k 5k 10k 20k hz frequency response (input level=0dbfs) (including external lpf)
asahi kasei [AKD4395] 19 2000/7 ( fs=96khz) akm ak4395 crosstalk -150 -100 -147.5 -145 -142.5 -140 -137.5 -135 -132.5 -130 -127.5 -125 -122.5 -120 -117.5 -115 -112.5 -110 -107.5 -105 -102.5 d b r a 40 40k 50 100 200 500 1k 2k 5k 10k 20k hz cross-talk (input level=0dbfs)
asahi kasei [AKD4395] 20 2000/7 important notice these products and their specifications are subject to change without notice. before considering any use or application, consult the asahi kasei microsystems co., ltd. (akm) sales office or authorized distributor concerning their current status. akm assumes no liability for infringement of any patent, intellectual property, or other right in the application or use of any information contained herein. any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. akm products are neither intended nor authorized for use as critical components in any safety, life support, or other hazard related device or system, and akm assumes no responsibility relating to any such use, except with the express written consent of the representative director of akm. as used here: (a) a hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. (b) a critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. it is the responsibility of the buyer or distributor of an akm product who distributes, disposes of, or otherwise places the product with a third party to notify that party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold akm harmless from any and all claims arising from the use of said product in the absence of such notification.
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