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[AKD4421A-SA] ak4421a evaluation board rev.1 a kd4421 a -s a general description AKD4421A-SA is an evaluation board for ak 4421a (192khz sampling 24bit stereo ? dac with 2vrms output). AKD4421A-SA has a digital audio interface (ak4115) of optical input and can easily achieve the interface with digital audio syste m. therefore, it is easy to evaluate the sound quality of ak4421a. ? ordering guide AKD4421A-SA ---- ak4421a evaluation board function ? on-board digital audio interface. (ak4115) ak4115 ak4421a bnc conn ector rch lch dir opt in bnc conn ector torx141 port2 external reg:12 v ->3.3 v v dd:3.3 v vcc:12v coax in reg:12 v ->3.3 v cvdd:3.3 v figure 1. AKD4421A-SA block diagram (* circuit diagram are attached at the end of this manual.) km098701 2009/04 - 1 -
[AKD4421A-SA] board outline chart ? outline chart 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 figure 2. AKD4421A-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, port 2 (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. km098701 2009/04 - 2 -
[AKD4421A-SA] ? 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 vcc1 ( note 1 ) red +12v +7 +15v avdd, dvdd, tvdd, ovdd of ak4115 and vcc of logic circuit (regulator:t2) connected to +12v vdd1 red +3.3v +3.0 +3.6v vdd of ak4421a connected to +3.3v cvdd1 red +3.3v +3.0 +3.6v cvdd of ak4421a connected to +3.3v agnd2 black 0v 0v ground connected to gnd ( should be connected ) reg ( note 2 ) red +12v +7v~+15v vdd, cvdd of ak4421a (regulator:t1) open table 1.set up of power supply lines note 1 ) in case of using +3.3v power supply to connect vcc1 , it is possible to supply the voltage to ak4115 and the logic circuit without using regulator. in this case, change to r36: open ? short (0
); r34,r35: short (0
) ? open note 2 ) in case of using +12v power supply to connect reg, use regulator: t1 can supply ak4421a with clean voltage. in this case, change to r25,r44: short (0
) ? open; r37,r43:open ? short (0
); vdd, cvdd should be open. 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 ak4421a 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 th e received data through bn c connector (j3). it is possible to evaluate the ak4421a 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 th at includ master clock via po rt2 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. km098701 2009/04 - 3 -
[AKD4421A-SA] ? 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. km098701 2009/04 - 4 -
[AKD4421A-SA] measurement results [measurement condition] ? measurement unit : audio precisi on 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=3.3v ? interface : dir ? temperature : room table data fs=44.1khz parameter input signal filter condition lch rch unit s/(n+d) 1khz, 0db 20k spcl 94.6 94.5 db dr 1khz, -60db 20k spcl, a-weighted 103.1 103.2 db s/n ?0? data 20k spcl, a-weighted 103.2 103.6 db fs=96khz parameter input signal filter condition lch rch unit s/(n+d) 1khz, 0db 40k spcl 93.7 94.2 db dr 1khz, -60db 40k spcl, a-weighted 103.1 103.3 db s/n ?0? data 40k spcl, a-weighted 103.3 103.5 db fs=192khz parameter input signal filter condition lch rch unit s/(n+d) 1khz, 0db 40k spcl 93.8 94.1 db dr 1khz, -60db 40k spcl, a-weighted 103.1 103.2 db s/n ?0? data 40k spcl, a-weighted 103.3 103.4 db km098701 2009/04 - 5 -
[AKD4421A-SA] plot data fs = 44.1khz (mclk=512fs) a km fft 0db fs=44.1khz, 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 figure 3 fft (fin=1khz, input level=0dbfs) a km fft -60db fs=44.1khz, 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 figure 4 fft (fin=1khz, input level=-60dbfs) km098701 2009/04 - 6 -
[AKD4421A-SA] a km fft no signal fs=44.1khz -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 figure 5 fft (no signal) a km fft out of band noise fs=44.1khz -160 +0 -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) km098701 2009/04 - 7 -
[AKD4421A-SA] a km thd + n vs input level fs=44.1khz, fin=1khz -120 -80 -117.5 -115 -112.5 -110 -107.5 -105 -102.5 -100 -97.5 -95 -92.5 -90 -87.5 -85 -82.5 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 a km thd + n vs input frequency fs=44.1khz, 0dbfs -140 +0 -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 55 5 figure 8 thd+n vs. input frequency km098701 2009/04 - 8 -
[AKD4421A-SA] a km linearity fs=44.1khz, fin=1khz -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 9 linearity a km frequency response fs=44.1khz, 0dbfs -5 +5 -4 -3 -2 -1 +0 +1 +2 +3 +4 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz figure 10 frequency response km098701 2009/04 - 9 -
[AKD4421A-SA] a km crosstalk fs=44.1khz, 0dbfs -120 -50 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 d b 20 20k 50 100 200 500 1k 2k 5k 10k hz figure 11 crosstalk km098701 2009/04 - 10 -
[AKD4421A-SA] fs = 96khz (mclk=256fs) a km fft 0db fs=96khz, 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 figure 12 fft (fin=1khz, input level=0dbfs) a km fft -60db fs=96khz, 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 figure 13 fft (fin=1khz, input level=-60dbfs) km098701 2009/04 - 11 -
[AKD4421A-SA] a km fft no signal fs=96khz -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 figure 14 fft (no signal) a km fft out of band noise fs=96khz -160 +0 -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) km098701 2009/04 - 12 -
[AKD4421A-SA] a km thd + n vs input level fs=96khz, fin=1khz -120 -80 -117.5 -115 -112.5 -110 -107.5 -105 -102.5 -100 -97.5 -95 -92.5 -90 -87.5 -85 -82.5 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 a km thd + n vs input frequency fs=96khz, 0dbfs -140 +0 -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 17 thd+n vs. input frequency km098701 2009/04 - 13 -
[AKD4421A-SA] a km linearity fs=96khz, fin=1khz -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 18 linearity a km frequency response fs=96khz, 0dbfs -8 +8 -7 -6 -5 -4 -3 -2 -1 +0 +1 +2 +3 +4 +5 +6 +7 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz figure 19 frequency response km098701 2009/04 - 14 -
[AKD4421A-SA] a km crosstalk fs=96khz, 0dbfs -120 -50 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 d b 20 20k 50 100 200 500 1k 2k 5k 10k hz figure 20 crosstalk km098701 2009/04 - 15 -
[AKD4421A-SA] fs = 192khz (mclk=128fs) a km fft 0db fs=192khz, 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 figure 21 fft (fin=1khz, input level=0dbfs) a km fft -60db fs=192khz, 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 figure 22 fft (fin=1khz, input level=-60dbfs) km098701 2009/04 - 16 -
[AKD4421A-SA] a km fft no signal fs=192khz -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 figure 23 fft (no signal) a km fft out of band noise fs=192khz -160 +0 -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) km098701 2009/04 - 17 -
[AKD4421A-SA] a km thd + n vs input level fs=192khz, fin=1khz -120 -80 -117.5 -115 -112.5 -110 -107.5 -105 -102.5 -100 -97.5 -95 -92.5 -90 -87.5 -85 -82.5 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 a km thd + n vs input frequency fs=192khz, 0dbfs -140 +0 -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 55 figure 26 thd+n vs. input frequency km098701 2009/04 - 18 -
[AKD4421A-SA] a km linearity fs=192khz, fin=1khz -140 +10 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 +0 d b r a -140 +0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 dbfs figure 27 linearity a km frequency response fs=192khz, 0dbfs -8 +8 -7 -6 -5 -4 -3 -2 -1 +0 +1 +2 +3 +4 +5 +6 +7 d b r a 20 20k 50 100 200 500 1k 2k 5k 10k hz figure 28 frequency response km098701 2009/04 - 19 -
[AKD4421A-SA] a km crosstalk fs=192khz, 0dbfs -120 -50 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 d b 20 20k 50 100 200 500 1k 2k 5k 10k hz figure 29 crosstalk km098701 2009/04 - 20 -
[AKD4421A-SA] km098701 2009/04 - 21 - revision history important notice z these products and their specifications ar e subject to change without notice. when you consider any use or application of these products , please make inquiries the sales office of asahi kasei microdevices corporation (akm) or authorized distributors as to current status of the products. z akm assumes no liability for infringement of any patent, intellect ual property, or other rights in the application or use of any information contained herein. z 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 expor t pertaining to customs and tariffs, currency exchange, or strategic materials. z akm 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 akm assumes no responsibility for such use, except for the use approved with the express written consent by representativ e director of akm. 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. z it is the responsibility of the buyer or distributor of akm pr oducts, who distributes, dispos es 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 akm 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 09/02/06 km098700 0 first edition change 22 circuit diagram were changed. c1, c2 : 1uf 2.2uf 09/04/23 km098701 1 change 5-20 table data and plot data were updated.
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 title size document number rev date: sheet of ak4421a 1 AKD4421A-SA 11 title size document number rev date: sheet of ak4421a 1 AKD4421A-SA 11 title size document number rev date: sheet of ak4421a 1 AKD4421A-SA 11 lout rout vdd agnd dif smute 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 +3.3v coax +3.3v +12v +12v +12v-->+3.3v +12v-->+3.3v r31 10k r31 10k + c7 (short) + c7 (short) + c42 47u + c42 47u 1 2 r38 (short) r38 (short) + c6 10u + c6 10u r43 (open) r43 (open) r30 (open) r30 (open) + c15 (open) + c15 (open) r18 (open) r18 (open) r17 (open) r17 (open) c22 0.1u c22 0.1u ak4421a u1 ak4421a u1 cn 1 cp 2 smute 3 mclk 4 bick 5 sdti 6 lrck 7 dif 8 aoutr 9 aoutl 10 vdd 11 vss1 12 dzf 13 cvdd 14 vss2 15 vee 16 + c26 10u + c26 10u d1 hsu119 d1 hsu119 k a r16 (open) r16 (open) l1 47u l1 47u 1 2 c12 (open) c12 (open) r33 0 r33 0 l2 (short) l2 (short) 1 2 vdd1 t45-red vdd1 t45-red 1 j2 bnc-r-pc j2 bnc-r-pc 1 2 3 4 5 r1 (open) r1 (open) sw2 ate1d-2m3 sw2 ate1d-2m3 2 1 3 port1 torx141 port1 torx141 out 1 vcc 3 gnd 2 r22 5.1 r22 5.1 reg t45-red reg t45-red 1 r25 (short) r25 (short) r36 (open) r36 (open) r14 51 r14 51 r29 (open) r29 (open) + c19 10u + c19 10u c41 0.1u c41 0.1u r40 10 r40 10 r2 (open) r2 (open) c27 0.1u c27 0.1u + c35 470u + c35 470u c18 0.1u c18 0.1u c48 0.1u c48 0.1u r41 (open) r41 (open) t2 upc3533hf t2 upc3533hf out 3 gnd 2 in 1 c23 0.1u c23 0.1u r45 (open) r45 (open) c39 0.1u c39 0.1u + c8 (short) + c8 (short) c37 0.1u c37 0.1u r19 (open) r19 (open) l4 (short) l4 (short) 1 2 test3 test3 + c30 4.7u + c30 4.7u test1 test1 c13 (open) c13 (open) c31 0.1u c31 0.1u r12 51 r12 51 r8 (short) r8 (short) c14 (open) c14 (open) cvdd1 t45-red cvdd1 t45-red 1 + c17 47u + c17 47u r3 560 r3 560 r13 51 r13 51 c2 2.2u c2 2.2u r9 (open) r9 (open) r15 (open) r15 (open) r10 (short) r10 (short) c9 2.2nf c9 2.2nf c29 0.1u c29 0.1u t1 upc3533hf t1 upc3533hf out 3 gnd 2 in 1 c3 0.1u c3 0.1u c34 0.1u c34 0.1u r6 (short) r6 (short) c16 0.1u c16 0.1u c20 0.1u c20 0.1u r44 (short) r44 (short) r42 (open) r42 (open) r11 5.1 r11 5.1 c5 0.1u c5 0.1u r5 (short) r5 (short) r23 47k r23 47k port2 a1-10pa-2.54dsa port2 a1-10pa-2.54dsa 1 2 3 4 5 6 7 8 9 10 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 + c44 470u + c44 470u c11 (open) c11 (open) + c24 10u + c24 10u agnd2 t_45(black) agnd2 t_45(black) 1 r28 (open) r28 (open) sw1 dss102 sw1 dss102 1 2 4 3 r27 (open) r27 (open) r21 (short) r21 (short) r39 5.1 r39 5.1 r32 75 r32 75 c32 0.1u c32 0.1u vcc1 t45-red vcc1 t45-red 1 c21 0.1u c21 0.1u 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 c43 0.1u c43 0.1u c1 2.2u c1 2.2u r26 10k r26 10k + c28 10u + c28 10u + c4 10u + c4 10u r35 (short) r35 (short) + c40 470u + c40 470u 1 2 r7 (open) r7 (open) r24 47k r24 47k r34 (short) r34 (short) l3 (short) l3 (short) 1 2 r4 560 r4 560 c25 0.1u c25 0.1u r20 (short) r20 (short) c45 0.1u c45 0.1u c38 0.1u c38 0.1u r37 (open) r37 (open) j3 bnc-r-pc j3 bnc-r-pc + c33 10u + c33 10u j1 bnc-r-pc j1 bnc-r-pc 1 2 3 4 5 + c36 47u + c36 47u c10 2.2nf c10 2.2nf test2 test2 - 22 -

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