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| ASAHI KASEI [AKD4385-B] AKD4385-B Evaluation board for AK4385 General Description The AKD4385 -B is an evaluation board for AK4385, which is 192kHz sampling 24Bit DAC. The AKD4385 -B includes a LPF which can add differential analog outputs from the AK4385 and also has a digital interface. Therefore, it is easy to evaluate the AK4385. < Ordering Guide AKD4385-B --- Evaluation board for AK4385 Function < On-board Analog output buffer circuit < On -board digital audio interface (AK4113) Output LPF Lch DIR COAX in AK4385 AK4113 OPT in Rch Figure 1. Block diagram * Circuit diagram and PCB layout are attached at the end of this manual. * COAX is recommended for an evaluation of the sound quality. -1- 2004/07 ASAHI KASEI [AKD4385-B] n Operation sequence 1) Set up the power supply lines. (See "Other jumpers set-up".) Name +12V -12V AGND Color Red Blue Black Voltage +12+15V -12-15V 0V Comments Regulator, Power supply for Op-amp. Regulator, Power supply for Op-amp. GND Attention This jack is always needed. Power line This jack is always needed. Power line This jack is always needed. Table 1. Set up of power supply lines Each supply line should be distributed from the power supply unit. 2) Set-up the jumper for power supply [JP2 (AVDD)] selects power supply for DVDD pin of AK4385. short: open: open: short: 3) Set-up the jumper pins 4) Set-up the DIP switches. (See the followings.) 5) Power on The AK4385 should be reset once bringing SW1 (PDN) "L" upon power-up. 5V is supplied from T3. In the case, JP1 should be open. 5V is supplied from T2. (default) 5V is supplied from T2. In the case, JP1 should be short. 5V is supplied from T2. (default) [JP1(DVDD)] selects power supply for DVDD pin of AK4385. -2- 2004/07 ASAHI KASEI [AKD4385-B] n Evaluation mode 1. DIR(COAX Link) (default) J1 is used for the evaluation using such as CD test disk. The DIR generates MCLK, BICK and LRCK SDATA from the received data through BNC connector (J1). Setting of jumper is shown below. * COAX is recommended for an evaluation of the sound quality. JP1 OPT COAX JP3 JP2 DVDD BNC (Default) AVDD Figure 2. Jumper setting, when using DIR 2. DIR(Optical Link) J1 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). Setting of jumper is shown below. JP3 JP1 OPT COAX JP2 DVDD PORT1 AVDD Figure 3. Jumper setting, when using DIR n DIP Switch setting [SW2]: AK4113 setting No. 1 2 Pin OCKS1 OCKS0 OFF ON Default ON OFF AK4113 Master Clock setting Refer to Table3 Table 2. SW2 setting The frequencies of the master clock output is set by OCKS0 and OCKS1 as shown in Table 3. OCKS1 0 1 1 OCKS0 0 0 1 MCLK Frequency 256fs @fs=88.2/96kHz 512fs @32/44.1/48kHz 128fs @176.4/192kHz Table 3. MCLK Clock Default n SW1 setting [SW1](PDN): Reset of AK4385. Select "H" during operation. -3- 2004/07 ASAHI KASEI [AKD4385-B] < External Analog Circuit The 2nd order LPF (fc=93.2kHz, Q=0.712) which adds differential outputs of the AK4385 is implemented on the board. When the further attenuation of the out-band noise is needed, some additional LPF is required. Analog signal is output through BNC connectors on the board. And the output level of the AK4385 is 5.5Vpp@5V. LOUT(ROUT-) R2 R1 R3 C1 R1 R3 C2 +15V + 22u 100 LOUT+ (ROUT+) NJM4580D R2 C2 10k -15V Figure 4. On-board analog filter R1 4.7k R2 R3 C1 4.7k 200 3300p Table 4. The value of R, C on this board C2 470p fin 20kHz 40kHz Frequency Response -0.003dB -0.122dB Table 5. Frequency Response of LPF Amplitude = 20 log K= fc= 0= Q= R2 , R1 0 , 2 1 , 2C1C2R2R3 2C10 . 1+1+1 R1 R2 R3 K [1-(f/fc) ] +[(1/Q)(f/fc)] 2 22 80kHz -1.821dB [dB], -4- 2004/07 ASAHI KASEI [AKD4385-B] Measurement Results [Measurement condition] * Measurement unit * MCLK * BICK * fs * Bit * Power Supply * Interface * Temperature fs=44.1kHz Parameter S/(N+D) DR S/N Input signal 1kHz, 0dB 1kHz, -60dB "0" data Measurement filter 20kLPF 22kLPF, A-weighted 22kLPF, A-weighted Results 95.2 dB 107.9 dB 109.0 dB : Audio Precision System two Cascade (AP2) : 512fs (44.1kHz),256fs (96kHz), 128fs (192kHz) : 64fs : 44.1kHz, 96kHz, 192kHz : 24bit : VDD=5V : Internal DIR (48kHz, 96kHz, 192kHz) : Room fs=96kHz Parameter S/(N+D) DR DR S/N S/N fs=192kHz Parameter S/(N+D) DR DR S/N S/N Input signal 1kHz, 0dB 1kHz, -60dB 1kHz, -60dB "0" data "0" data Measurement filter 40kLPF 40kLPF 22kLPF, A-weighted 40kLPF 22kLPF, A-weighted Results 91.7 dB 101.2 dB 106.1 dB 102.4 dB 107.6 dB Input signal 1kHz, 0dB 1kHz, -60dB 1kHz, -60dB "0" data "0" data Measurement filter 40kLPF 40kLPF 22kLPF, A-weighted 40kLPF 22kLPF, A-weighted Results 92.2 dB 102.7 dB 107.6 dB 103.1 dB 108.5 dB -5- 2004/07 ASAHI KASEI [AKD4385-B] Plots (fs=44.1kHz) AKM +0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100 AK4385 FFT plot VDD=5V, fs=44.1kHz, 0dBFS input 200 500 Hz 1k 2k 5k 10k 20k Figure 5. FFT (fin=1kHz, Input Level=0dBFS) AKM +0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100 AK4385 FFT plot VDD=5V, fs=44.1kHz, -60dBFS input 200 500 Hz 1k 2k 5k 10k 20k Figure 6. FFT (fin=1kHz, Input Level=-60dBFS) -6- 2004/07 ASAHI KASEI [AKD4385-B] (fs=44.1kHz) AKM +0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100 200 AK4385 FFT plot VDD=5V, fs=44.1kHz, No input 500 Hz 1k 2k 5k 10k 20k 30k Figure 7. FFT (Noise Floor) AKM +0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100 200 AK4385 FFT plot Outband noise VDD=5V, fs=44.1kHz, No input 500 1k Hz 2k 5k 10k 20k 50k 100k Figure 8. FFT (Outband noize) -7- 2004/07 ASAHI KASEI [AKD4385-B] (fs=44.1kHz) AKM -80 -82.5 -85 -87.5 -90 -92.5 -95 d B r A -97.5 -100 -102.5 -105 -107.5 -110 -112.5 -115 -117.5 -120 -120 -110 -100 -90 -80 AK4385 THD+N vs. Input Level VDD=5V, fs=44.1kHz -70 -60 dBFS -50 -40 -30 -20 -10 +0 Figure 9. THD+N vs. Input level (fin=1kHz) AKM -80 -82.5 -85 -87.5 -90 -92.5 -95 d B r A -97.5 -100 -102.5 -105 -107.5 -110 -112.5 -115 -117.5 -120 20 50 100 200 AK4385 THD+N vs. Input Level VDD=5V, fs=44.1kHz 500 Hz 1k 2k 5k 10k 20k Figure 10. THD+N vs. Input Frequency (Input level=0dBFS) -8- 2004/07 ASAHI KASEI [AKD4385-B] (fs=44.1kHz) AKM +0 -10 -20 -30 -40 d B r A -50 -60 -70 -80 -90 -100 AK4385 Linearity VDD=5V, fs=44.1kHz -110 -110 -100 -90 -80 -70 -60 dBFS -50 -40 -30 -20 -10 +0 Figure 11. Linearity (fin=1kHz) Figure 12. Frequency Response (Input level=0dBFS) -9- 2004/07 ASAHI KASEI [AKD4385-B] (fs=44.1kHz) Figure 13. Crosstalk (Input level=0dBFS) - 10 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=96kHz) Figure 14. FFT (fin=1kHz, Input Level=0dBFS) Figure 15. FFT (fin=1kHz, Input Level=0dBFS, Notch) - 11 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=96kHz) Figure 16. FFT (fin=1kHz, Input Level=-60dBFS) Figure 17. FFT (Noise Floor) - 12 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=96kHz) Figure 18. THD+N vs. Input level (fin=1kHz) Figure 19. THD+N vs. Input Frequency (Input level=0dBFS) - 13 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=96kHz) Figure 20. Linearity (fin=1kHz) Figure 21. Frequency Response (Input level=0dBFS) - 14 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=96kHz) Figure 22. Crosstalk (Input level=0dBFS) - 15 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=192kHz) Figure 23. FFT (fin=1kHz, Input Level=0dBFS) Figure 24. FFT (fin=1kHz, Input Level=0dBFS, Notch) - 16 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=192kHz) Figure 25. FFT (fin=1kHz, Input Level=-60dBFS) Figure 26. FFT (Noise Floor) - 17 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=192kHz) Figure 27. THD+N vs. Input level (fin=1kHz) Figure 28. THD+N vs. Input Frequency (Input level=0dBFS) - 18 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=192kHz) Figure 29. Linearity (fin=1kHz) Figure 30. Frequency Response (Input level=0dBFS) - 19 - 2004/07 ASAHI KASEI [AKD4385-B] (fs=192kHz) Figure 31. Crosstalk (Input level=0dBFS) - 20 - 2004/07 ASAHI KASEI [AKD4385-B] 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. - 21 - 2004/07 5 4 3 2 1 R1 D1 HSU119 -15V R2 1 2 U1A 74HC14 3 4 U1B 74HC14 C2 + 100 N15V 2 10k L 3 1 SW1 PDN 2 1 H C1 47u 0.1u C3 0.1u D D P15V T1 TA48M33F for 74HC14 GND OUT IN OUT GND 2 C4 R3 5.1 C12 10u 1 + C13 0.1u 2 C14 0.1u 3 C T3 NJM78M05FA 1 C6 C7 + C8 0.1u + 3 IN 1 +15V C5 + 1 2 C10 0.1u 2 + C11 47u SW2 U2 1 2 OCKS DVDD CM0/CDTO/CAD1 30 4 3 OCKS1 OCKS0 0.1u 0.1u DVSS CM1/CDTI/SDA 29 R4 47k TVDD OCKS1/CCLK/SCL 28 C R5 47k 4 V/TX OCKS0/CSN/CAD0 27 R6 5 XTI MCKO1 26 R7 6 XTO MCKO2 25 R8 7 R9 15k 8 C17 10u 9 + C18 0.1u 10 B 3 47u C9 C110 0.1u 47u 47u U3 100 1 100 2 100 3 R10 100 4 LRCK VSS 13 SDTI VDD 14 0.1u C16 + 10u C15 BICK DZFR 15 MCLK DZFL 16 PDN DAUX 24 R BICK 23 AVDD SDTO 22 5 PDN AOUTL+ 12 AOUTL+ AVSS LRCK 21 TEST1 5 6 6 CSN AOUTL- 11 AOUTLB 11 RX1 INT0 20 U1C 74HC14 19 9 8 U1D 74HC14 7 CCLK AOUTR+ 10 AOUTR+ 12 RX2/DIF0 FS96/I2C 8 CDTI AOUTR- 9 AOUTR- 13 RX3/DIF1 P/SN 18 11 17 13 10 U1E 74HC14 12 U1F 74HC14 AK4385 14 J1 COAX C19 0.1u COAX 15 RX4/DIF2 INT1 RX5 RX6/IPS 16 R11 75 JP1 RX OPT AK4113 SW2 OCKS1 OCKS0 L L H Master Clock A A L1 PORT1 VCC GND OUT DIR 3 2 1 C20 H H 256fs@fs=88.2k/96kHz 128fs@fs=176.4k/192kHz Title AKD4385 Size A3 Date: 5 4 3 2 47u L 512fs@fs=32k/44.1k/48kHz 0.1u R12 470 Document Number AK4385 Thursday, July 22, 2004 Sheet 1 Rev B 1 of 2 5 4 3 2 1 D D R13 4.7k C23 470 R14 4.7k AOUTL4 C24 3300p AOUTL+ R16 4.7k R19 4.7k C26 470p R17 200 C100 2 NC 3 R15 200 C25 22u 1 + R100 100 J2 LOUT C 8 U4A NJM4580 R18 10k C27 0.1u + C28 10u R20 4.7k B B C31 470p R21 4.7k AOUTR4 C32 3300p AOUTR+ R23 4.7k R26 4.7k C34 470p R24 200 C101 6 NC 5 R22 200 C33 22u 7 + R101 100 J3 ROUT A 8 U4B NJM4580 R25 10k 5 4 3 + C21 0.1u C22 10u + + C P15V N15V A Title AKD4385 Size A3 Date: 2 Document Number Analog Thursday, July 22, 2004 Sheet 1 Rev B 2 of 2 |
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