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[AKD4424-SA] km092501 2008/03 general description AKD4424-SA is an evaluation board for ak4424 (192khz sampling 24bit stereo ? dac with 2vrms output). AKD4424-SA has a digital audio interface (ak4115) of optical input and can easily achieve the interface with digital audio system. therefore, it is easy to evaluate the sound quality of ak4424. ordering guide AKD4424-SA ---- ak4424 evaluation board function ? on-board digital audio interface. (ak4115) ak4115 ak4424 bnc connector rch lch dir opt in bnc connector torx141 port2 external reg:12v->5v vdd:5v vcc:3.3v coax in reg:12v->3.3v cvdd:5v figure 1. AKD4424-SA block diagram (* circuit diagram are attached at the end of this manual.) ak4424 evaluation board rev.1 a kd4424-s a
[AKD4424-SA] km092501 2008/03 board outline chart outline chart figure 2. AKD4424-SA outline chart comment (1) lout, rout (bnc-jack) it is analog signal output jack. the signal is output from lout/rout pins. (2) coax, port1, port2 (digital signal connector) coax (bnc-jack): digital signal (spdif, fs: 24 ? 48khz) is input to the ak4115. (default) port1 (optical connecter): optical digital signal (spdif, fs: 32 ? 48khz) is input to the ak4115. port2 (10 pin header): the clock and data can be input and output with this connector. (3) reg, vdd, agnd, cvdd, vcc these are the power supply connectors. connect power supply with these pins. as for the detail comments, refer to the setup of power supply in p3. (4) sw1, sw2 (switch) sw1: setting of frequency of mcko that is output from ak4115. sw2: reset of ak4115. keep ?h? during normal operation. vdd agnd sw2 u3 test1 port2 1 10 vcc cvdd reg t1 lout rout t2 coa x u2 1 sw1 h l u1 1 port1
[AKD4424-SA] km092501 2008/03 operation sequence 1) set up the power supply lines. each supply line should be distributed from the power supply unit. name of jack color of jack typ voltage voltage range using default setting vdd1 red +5v +4.5 +5.5v vdd of ak4424 connected to +5v cvdd1 red +5v +4.5 +5.5v cvdd of ak4424 connected to +5v +3.3v +3.0 +3.6v avdd, dvdd, tvdd, ovdd of ak4115 and vcc of logic circuit connected to +3.3v vcc1 red +12v ( note 1 ) +5.8v~+20v regulator: t2: +12v +3.3v (avdd, dvdd, tvdd, ovdd of ak4115 and vcc of logic circuit ) agnd2 black 0v 0v ground connected to gnd ( should be connected ) reg red +12v ( note 2 ) +7v~+25v regulator: t1: +12v +5v (vdd, cvdd of ak4424) open (not connected) table 1.set up of power supply lines note 1 ) use regulator: t2 can supply ak4115 with clear voltage r36: short (0
) open; r34,r35:open short (0
); connect to vcc with 12v power supply. note 2 ) use regulator: t1 can supply ak4424 with clear voltage r25,r44: short (0
) open; r37,r43:open short (0
); vdd, cvdd should be open. connect to reg with 12v power supply. 2) dip switch setting: refer to table 2 and table 3 3) power down: the ak4115 should be reset once by bringing sw2 (ak4115 pdn) ?l? upon power-up. evaluation mode 1. using dir (optical link) the dir generates mclk, bick, lrck and sdata from the received data through optical connector (port1: torx141). it is possible to evaluate the ak4424 by using cd disk. setting: r19: open 470 ? ; r33: short (0 ? ) open 2. using dir (coax) (default) the dir generates mclk, bick, lrck and sdata from the received data through bnc connector (j3). it is possible to evaluate the ak4424 by using cd disk. setting: r19: open; r33: short (0 ? ); (default) ? coax is recommended for an evaluation of the sound quality. 3. supply all interface signals that includ master clock via port2 from external equipments.. setting: r11: 5.1 ? open r12, r13, r14: 51 open r15, r16, r17, r18: open 51 ? or short (0 ) note) the above work of removing (open) or shorting resistors need to modify the connection by soldering.
[AKD4424-SA] km092501 2008/03 setting of dip switch [sw1]: ak4115 setting no. pin off on default w y6 1 ocks1 on 2 ocks0 ak4115 ? s master clock setting look table 3 off table 2. sw1 setting ocks1 ocks0 mclk frequency 0 0/1 256fs @ fs=96khz 1 0 512fs @ fs=48khz 1 1 128fs @ fs=192khz default table 3. mclk clock setting setting of sw2 switch [sw2](pdn): reset of ak4115. keep ?h? during normal operation.
[AKD4424-SA] km092501 2008/03 measurement results [measurement condition] ? measurement unit : audio precision system two cascade (ap2) ? mclk : 512fs (fs=44.1khz) / 256fs (fs=96khz ) / 128fs (fs=192khz) ? bick : 64fs ? fs : 44.1khz / 96khz / 192khz ? bit : 24bit ? power supply : vdd=cvdd=5v ? interface : dir ? temperature : room table data fs=44.1khz parameter input signal filter condition lch rch s/(n+d) 1khz, 0db 20klpf 91.4 92.1 dr 1khz, -60db 20klpf, a-weighted 104.9 104.8 s/n ?0? data 20klpf, a-weighted 105.3 105.3 fs=96khz parameter input signal filter condition lch rch s/(n+d) 1khz, 0db 40klpf 90.8 91.3 dr 1khz, -60db 40klpf, a-weighted 104.9 104.9 s/n ?0? data 40klpf, a-weighted 105.3 105.3 fs=192khz parameter input signal filter condition lch rch s/(n+d) 1khz, 0db 40klpf 91.2 91.8 dr 1khz, -60db 40klpf, a-weighted 104.6 104.6 s/n ?0? data 40klpf, a-weighted 104.7 104.7
[AKD4424-SA] km092501 2008/03 plot data fs=44.1khz -180 + 0 -170 -160 -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 figure 3. fft (0db) -180 + 0 -170 -160 -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 figure 4. fft (-60db)
[AKD4424-SA] km092501 2008/03 -180 + 0 -170 -160 -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 figure 5. fft (no signal) -180 + 0 -170 -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 figure 6. fft (out of band noise)
[AKD4424-SA] km092501 2008/03 -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b r a -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs figure 7. thd + n vs input level -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz figure 8. thd + n vs input frequency
[AKD4424-SA] km092501 2008/03 -5 + 1 -4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 -0 +0.5 d b r a 1k 20k 2k 3k 4k 5k 6k 7k 8k 9k 10k 11k 12k 13k 14k 15k 16k 17k 18k 19k hz figure 9. frequency response -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 figure 10. linearity
[AKD4424-SA] km092501 2008/03 -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b 20 20k 50 100 200 500 1k 2k 5k 10k hz figure 11. crosstalk
[AKD4424-SA] km092501 2008/03 fs=96khz -180 + 0 -170 -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 40k 50 100 200 500 1k 2k 5k 10k 20k hz figure 12. fft (0db) -180 + 0 -170 -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 40k 50 100 200 500 1k 2k 5k 10k 20k hz figure 13. fft (-60db)
[AKD4424-SA] km092501 2008/03 -180 + 0 -170 -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 40k 50 100 200 500 1k 2k 5k 10k 20k hz figure 14. fft (no signal) -180 + 0 -170 -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 figure 15. fft (out of band noise)
[AKD4424-SA] km092501 2008/03 -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b r a -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs figure 16. thd + n vs input level -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b r a 20 40k 50 100 200 500 1k 2k 5k 10k 20k hz figure 17. thd + n vs input frequency
[AKD4424-SA] km092501 2008/03 -5 + 1 -4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 -0 +0.5 d b r a 2k 40k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k 32k 34k 36k 38k hz figure 18. frequency response -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 figure 19. linearity
[AKD4424-SA] km092501 2008/03 -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b 20 40k 50 100 200 500 1k 2k 5k 10k 20k hz figure 20. crosstalk
[AKD4424-SA] km092501 2008/03 fs=192khz -180 + 0 -170 -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 80k 50 100 200 500 1k 2k 5k 10k 20k 50k hz figure 21. fft (0db) -180 + 0 -170 -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 80k 50 100 200 500 1k 2k 5k 10k 20k 50k hz figure 22. fft (-60db)
[AKD4424-SA] km092501 2008/03 -180 + 0 -170 -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b r a 20 80k 50 100 200 500 1k 2k 5k 10k 20k 50k hz figure 23. fft (no signal) -180 + 0 -170 -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 figure 24. fft (out of band noise)
[AKD4424-SA] km092501 2008/03 -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b r a -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs figure 25. thd + n vs input level -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b r a 20 80k 50 100 200 500 1k 2k 5k 10k 20k 50k hz figure 26. thd + n vs input frequency
[AKD4424-SA] km092501 2008/03 19 -5 + 1 -4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 -0 +0.5 d b r a 5k 80k 10k 15k 20k 25k 30k 35k 40k 45k 50k 55k 60k 65k 70k 75k hz figure 27. frequency response -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 figure 28. linearity
[AKD4424-SA] km092501 2008/03 20 -140 - 70 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 d b 20 80k 50 100 200 500 1k 2k 5k 10k 20k 50k hz figure 29. crosstalk
[AKD4424-SA] km092501 2008/03 21 revision history important notice these products and their specifications are subject to change without notice. when you consider any use or application of these products, please make inquiries the sales office of asahi kasei emd corporation (akemd) or authorized distributors as to current status of the products. akemd assumes no liability for infringement of any patent, intellectual property, or other rights 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 expo rt pertaining to customs and tariffs, currency exchange, or strategic materials. akemd products are neither intended nor au thorized for use as critical components note1) in any safety, life support, or other hazard related device or system note2) , and akemd assumes no responsibility for such use, except for the use approved with the express written consent by representative director of akemd. as used here: note1) a critical component is one whose failure to func tion 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. note2) 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 othe r 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. it is the responsibility of the buyer or distributor of akemd products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third 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 akemd harmless from any and all claims arising from the use of said product in the absence of such notification. date (yy/mm/dd) manual revision board revision reason page contents 08/01/24 km092500 0 first edition change 22 circuit diagram was changed: regulator: t2: ta48033f upc3533hf change 1 figure 1. block diagram was changed. 08/03/17 km092501 1 change 3 table 1. set up of power supply lines was changed.
a a b b c c d d e e e e d d c c b b a a cvdd vdd vdd vdd vcc-r vcc vcc vcc vcc vdd vcc vcc-r vcc-r vcc-r vcc-r vcc-r vcc vcc-r vcc-r vcc-r cvdd vcc-r title size document number rev date: sheet of ak4424 1 AKD4424-SA 11 title size document number rev date: sheet of ak4424 1 AKD4424-SA 11 title size document number rev date: sheet of ak4424 1 AKD4424-SA 11 lout rout vdd agnd smute dem mclk bick stdi lrck vee dzf aoutl aoutr vss1 cvdd vss2 vdd vdd agnd dsp mclk bick sdto lrck ak4115-pdn h l ocks0 ocks1 h l agnd coax +3.3v +12v +12v +5v +12v-->+5v +12v-->+3.3v + c6 10u + c6 10u r18 (open) r18 (open) + c26 10u + c26 10u r16 (open) r16 (open) reg t45-red reg t45-red 1 c39 0.1u c39 0.1u + c8 (short) + c8 (short) c37 0.1u c37 0.1u r44 (short) r44 (short) c21 0.1u c21 0.1u c1 1u c1 1u port1 torx141 port1 torx141 out 1 vcc 3 gnd 2 r22 5.1 r22 5.1 r25 (short) r25 (short) r11 5.1 r11 5.1 c5 0.1u c5 0.1u vcc1 t45-red vcc1 t45-red 1 r24 47k r24 47k r20 (short) r20 (short) j1 bnc-r-pc j1 bnc-r-pc 1 2 3 4 5 + c15 (open) + c15 (open) r1 (open) r1 (open) r13 51 r13 51 c2 1u c2 1u agnd2 t_45(black) agnd2 t_45(black) 1 r30 (open) r30 (open) c48 0.1u c48 0.1u r41 (open) r41 (open) cvdd1 t45-red cvdd1 t45-red 1 r6 (short) r6 (short) c43 0.1u c43 0.1u r4 560 r4 560 test2 test2 l2 (short) l2 (short) 1 2 j2 bnc-r-pc j2 bnc-r-pc 1 2 3 4 5 r12 51 r12 51 sw1 dss102 sw1 dss102 1 2 4 3 r34 (open) r34 (open) + c42 47u + c42 47u 1 2 r40 10 r40 10 + c35 470u + c35 470u c3 0.1u c3 0.1u r28 (open) r28 (open) d1 hsu119 d1 hsu119 k a c12 (open) c12 (open) + c30 4.7u + c30 4.7u c29 0.1u c29 0.1u + c40 470u + c40 470u 1 2 r31 10k r31 10k r14 51 r14 51 c13 (open) c13 (open) t2 upc3533hf t2 upc3533hf out 3 gnd 2 in 1 c11 (open) c11 (open) + c33 10u + c33 10u r17 (open) r17 (open) r29 (open) r29 (open) r45 (open) r45 (open) r10 (short) r10 (short) + c44 470u + c44 470u c32 0.1u c32 0.1u r26 10k r26 10k r35 (open) r35 (open) c25 0.1u c25 0.1u c22 0.1u c22 0.1u test1 test1 r42 (open) r42 (open) r5 (short) r5 (short) u2 ak4115 u2 ak4115 dif0/rx5 1 test 2 dif1/rx6 3 xsel/rx7 5 dvdd 6 vin 7 daux 8 dvss 9 mcko1 10 mcko2 11 ovdd 12 ovss 13 bick 14 sdto 15 lrck 16 b 17 c 18 u 19 vout 20 tvdd 21 tx0 22 txp1 23 txn1 24 tvss 25 xti1 26 xto1 27 xti2 28 xto2 29 ovdd 30 ovss 31 ebick 32 emck 33 elrck 34 int0 35 int1 36 cm0/cdto/cad1 37 cm1/cdti/sda 38 ocks1/cclk/scl 39 ocks0/csn/cad0 40 dvss 42 bvss 43 ips1/iic 44 psel 45 xtl0 46 xtl1 47 filt 48 avss 49 r 50 vcom 51 avdd 52 p/sn 53 acks 54 rxn0 55 rxp0 56 avss 57 rx1 58 avdd 59 rx2 60 avss 61 rx3 62 avdd 63 ips0/rx4 64 pdn 4 dvdd 41 c38 0.1u c38 0.1u r3 560 r3 560 r9 (open) r9 (open) r39 5.1 r39 5.1 r37 (open) r37 (open) r38 (short) r38 (short) c18 0.1u c18 0.1u c23 0.1u c23 0.1u test3 test3 c20 0.1u c20 0.1u r32 75 r32 75 l3 (short) l3 (short) 1 2 r33 0 r33 0 sw2 ate1d-2m3 sw2 ate1d-2m3 2 1 3 l4 (short) l4 (short) 1 2 c14 (open) c14 (open) c16 0.1u c16 0.1u r7 (open) r7 (open) c45 0.1u c45 0.1u c10 2.2nf c10 2.2nf + c7 (short) + c7 (short) vdd1 t45-red vdd1 t45-red 1 c27 0.1u c27 0.1u r8 (short) r8 (short) + c24 10u + c24 10u r27 (open) r27 (open) u3 74hc14 u3 74hc14 gnd 7 1a 1 3a 5 5a 11 5y 10 3y 6 1y 2 2y 4 4y 8 6y 12 6a 13 4a 9 2a 3 vcc 14 r43 (open) r43 (open) r2 (open) r2 (open) c9 2.2nf c9 2.2nf c34 0.1u c34 0.1u + c28 10u + c28 10u + c4 10u + c4 10u t1 njm78m05fa t1 njm78m05fa out 3 gnd 2 in 1 l1 47u l1 47u 1 2 r19 (open) r19 (open) c31 0.1u c31 0.1u + c17 47u + c17 47u r23 47k r23 47k port2 a1-10pa-2.54dsa port2 a1-10pa-2.54dsa 1 2 3 4 5 6 7 8 9 10 ak4424 u1 ak4424 u1 cn 1 cp 2 dem 3 mclk 4 bick 5 sdti 6 lrck 7 smute 8 aoutr 9 aoutl 10 vdd 11 vss1 12 dzf 13 cvdd 14 vss2 15 vee 16 r36 (short) r36 (short) + c19 10u + c19 10u c41 0.1u c41 0.1u r15 (open) r15 (open) j3 bnc-r-pc j3 bnc-r-pc + c36 47u + c36 47u -22-

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