asahi kasei [akd4393] 1 2000/5 general description the akd4393 is an evaluation board for AK4393, which is 96khz sampling 24bit ds dac. the akd4393 includes a lpf which can add differential analog outputs from the AK4393 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 AK4393. < ordering guide akd4393 rev.c --- evaluation board rev.c for AK4393: 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 e x ternal clock rom data or a/d input optical input c s 8414 (dir ) clock gene rato r AK4393 2nd order lpf rch lch fig.1 block diagram * circuit diagram and pcb layout are attached at the end of this manual. evaluation board rev.c for AK4393 akd4393
asahi kasei [akd4393] 2 2000/5 < external analog circuit (rev.c) the differential output circuit and lpf is implemented on board. the differential outputs of AK4393 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 t he board. the output level is about 2.94vrms(typ@vref=5.0v) by cannon and 2vrms(typ@vref=5.0v) by bnc. fig.2 external analog filter < operation sequence 1.set up the jumpers for power supply. [jp15(reg)] selects power supply for avdd pin of AK4393. 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 AK4393 is supplied from +15v through regulator (jp15: short). a5v=5v: this jack is used when avdd of AK4393 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 AK4393 should be reset once by bringing pd "l" upon power-up.) *sw1 resets the AK4393 during operation. the AK4393 is reset at sw1="l" and exits resetting at sw1="h". 300 47u 300 aoutl- 560 10n 300 220 10n 6 4 3 2 7 10u 0.1u 0.1u 10u 10u njm5534d 300 47u 300 aoutl+ 560 10n 300 220 10n 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 4.7n 620 620 430 7 + + + + - + - + + + - + + 4.7n lch -15 +15 6 430
asahi kasei [akd4393] 3 2000/5 < 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 sdatafrom 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 akd4393 to akd43xx then lrck, bick and sdata are sent from akd43xx to akd4393. 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 [akd4393] 4 2000/5 (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) (3) 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 [akd4393] 5 2000/5 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. set-up of sw3, sw4(mode set-up of AK4393: see the data sheet of AK4393) dif2 dif1 dif0 mode bick off off off 0: lsb justified, 16bit 3 32fs off off on 1: lsb justified, 20bit 3 40fs off on off 2: lsb justified, 24bit 3 48fs off on on 3: i 2 s 3 48fs (default) on off off 4: msb justified, 24bit 3 48fs table 2 audio serial interface format select pins (sw3-5,6,7) 4-2. set-up of sw6 (mode set-up of cs8414. about details, see the data-sheet of cs8414) adjust the audio data format of cs8414 (dir) to AK4393. cs8414 does not match the lsb justified 20bit/24bit mode of AK4393. m3 (sw6-2) m2 (sw6-3) m1 (sw6-4) m0 (sw6-5) data format jp4 off off off off msb justified, 24bit inv off off on off i 2 s thr (default) off on off on lsb justified, 16bit thr table 3. set-up of sw6 sw6-1 (sel): usually on. sw6-6 (cs12): select the channel for indicating the channel status. on: rch (default), off: lch 5. parallel/serial control sw5: set up p/s pin of AK4393. h: parallel mode. port3 is used jp11, 12 and 13 should be open. l: serial mode. port3 is used. jp11, 12 and 13 should be open. 6. other set-up sw1: reset of AK4393. select "h" during operation. sw2: soft-mute of AK4393. 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 [akd4393] 6 2000/5 < AK4393 measurement example conditions: avdd =dvdd= 5.0v interface = dir (44.1khz, 96khz) mclk = 256fs(fs=44.1khz, 96khz) bick = 64fs fs = 44.1khz, 96khz input data = 24bit measurement unit: audio precision system two cascade (fs=44.1khz, 96khz) (akd4393 rev.c: differential output) fs result thd+n 102.3 20klpf dr 120.0 22klpf + a-weighted 44.1khz s/n 119.9 22klpf + a-weighted thd+n 100.9 40klpf dr 119.5 80klpf + a-weighted 96khz s/n 119.7 80klpf + a-weighted plot fft point: 16384 window: equiripple averages: 4
asahi kasei [akd4393] 7 2000/5 (fs=44.1khz) akm AK4393 fft (input leve=0dbfs,f in=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 (input level=0dbfs, fin=1khz) akm AK4393 fft (input leve=-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 (input level=-60dbfs, fin=1khz)
asahi kasei [akd4393] 8 2000/5 (fs=44.1khz) akm AK4393 fft (input = "0"data) -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 AK4393 fft (i nput = "0"data,out-of band) -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 (noise floor, out-of band)
asahi kasei [akd4393] 9 2000/5 (fs=44.1khz) akm AK4393 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 -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs thd + n vs amplitude (fin=1khz) akm AK4393 thd + n vs input frequency(input level=0dbfs) -120 -90 -118 -116 -114 -112 -110 -108 -106 -104 -102 -100 -98 -96 -94 -92 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz thd + n vs input frequency (input level=0dbfs)
asahi kasei [akd4393] 10 2000/5 (fs=44.1khz) akm AK4393 lin earity -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs linearity (fin=1khz) akm AK4393 f requency response -1 +1 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 +0 +0.1 +0.2 +0.3 +0.4 +0.5 +0.6 +0.7 +0.8 +0.9 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz frequency response (input level=0dbfs)
asahi kasei [akd4393] 11 2000/5 (fs=44.1khz) akm AK4393 c ross talk -140 -50 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz crosstalk (upper = rch, lower = lch)
asahi kasei [akd4393] 12 2000/5 (fs=96khz) akm AK4393 fft (input level= 0dbfs,fin=1khz, notch) -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 (input level=0dbfs, fin=1khz, notch) akm AK4393 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 (input level=-60dbfs, fin=1khz)
asahi kasei [akd4393] 13 2000/5 (fs=96khz) akm AK4393 fft (input = "0"data) -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) akm AK4393 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 -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs thd + n vs amplitude (fin=1khz)
asahi kasei [akd4393] 14 2000/5 (fs=96khz) akm AK4393 thd + n vs input frequency (input level=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 input frequency (input level=0dbfs) akm AK4393 lin earity -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs linearity (fin=1khz)
asahi kasei [akd4393] 2000/05 15 (fs=96khz) akm AK4393 c ross talk -1 +1 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 +0 +0.1 +0.2 +0.3 +0.4 +0.5 +0.6 +0.7 +0.8 +0.9 d b r a 40 40k 50 100 200 500 1k 2k 5k 10k 20k hz frequency response (input level=0dbfs) akm AK4393 c ross talk -140 -50 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz crosstalk (upper = rch, lower = lch)
asahi kasei [akd4393] 2000/05 16 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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