24bit 192kHz A/D converter

www.DataSheet4U.com ASAHI KASEI [AKD5386-B] AKD5386-B AK5386 Evaluation Board Rev.0 GENERAL DESCRIPTION AKD5386-B is an evaluation board for the digital audio 24bit 192kHz A/D converter, AK5386. AKD5386-B has analog input circuits and a digital interface transmitter, and can achieve the interface with digital audio systems via opt-connector. Ordering guide AKD5386-B --AK5386 Evaluation Board FUNCTION • DIT (AK4114) with optical output +3.3V REG +15V REG -15V +5V VA JP3 VD JP4 24.576MHz PORT2 GND RIN OP AMP LIN AK5386 AK4114 (DIT) Opt Out DSP Data 10pin Header Figure 1 AKD5386-B Block Diagram * Circuit diagram and PCB layout are attached at the end of this manual. -1- 2006/12 www.DataSheet4U.com ASAHI KASEI [AKD5386-B] Operation Manual Operation sequence 1) Set up the power supply lines. Name of connecto r Color of connector Default Setting +15V Voltage Used for Comment and attention +15V Green +10~15V NJM4580 Regulator T1 Regulator T2 -15V VA Blue Red -10~-15V +4.5~+5.5V NJM4580 VA of AK5386 VD Red +2.7~+3.6V AGND DGND Black Black 0V 0V VD of AK5386 AK4114 74HC14 Analog Ground Digital Ground This connector should be connected. And this connector is used when VA and VD of AK5386 is supplied from regulator T1 and T2. In this case, JP3 and JP4 should be REG side. When this is REG side, VA and VD connector should be open. (Default) This connector should be connected. This connector is used when VA of AK5386 is supplied from VA connector without regulator T1. In this case, JP3 should be VA side. This connector is used when VD of AK5386 is supplied from VD connector without regulator T2. In this case, JP4 should be VD side. This connector should be connected. This connector is used when DGND is supplied besides AGND. In this case, JP8 should be open. -15V Open Open 0V Open Table 1. Power supply lines (Note) Each supply line should be distributed from the power supply unit. 2) Set up the evaluation mode, jumper pins and DIP switches. (See the followings.) 3) Power on. The AK5386 and AK4114 should be reset once bringing SW2 = “L” upon power-up. Evaluation mode (1) Slave Mode (1-1) A/D evaluation using DIT function of AK4114 PORT2 (DIT) is used. DIT generates audio bi-phase signal from received data and which is output through optical connector (TOTX141). It is possible to connect AKM’s D/A converter evaluation boards on the digital-amplifier, which equips DIR input. Nothing should be connected to PORT1 (DSP). JP5 MCLK (1-2) All interface signals including master clock are fed externally. PORT1 (DSP) is used. All interface signals (MCLK, SCLK, LRCK) are provided to the AK5386 through PORT1. JP5 (MCLK) should be open. The DIF1 of SW1 (MODE) should be set to “H”. JP5 MCLK -2- 2006/12 www.DataSheet4U.com ASAHI KASEI Other jumper pins set up 1. JP2 (CKS1) : Setting of CKS1 pin for AK5386 Please refer to the setting of the AK5386 mode of page 4 Table 3. H : CKS1=”H” L : CKS1=”L” 2. JP3 (VA) : Select VA pin for AK5386 VA : Supply from VA connector. REG : Supply from regulator. In this case, VA connector should be open. 3. JP4 (VD) : Select VD pin for AK5386 VD : Supply from VD connector. REG : Supply from regulator. In this case, VD connector should be open. 4. JP5 (MCLK) : Select master clock of the AK5386. SHORT : AK4114 supplies MCLK. OPEN : PORT1 supplies MCLK. 5. JP6 (TX) : Select TX OPT : Optical Connector (PORT2) is used. BNC : BNC (J3) is used. 6. JP7 (AGND) : Analog ground 1 and Analog ground 2 SHORT : Common. OPEN : Separated. 7. JP8 (GND) : Analog ground 1 and Digital ground SHORT : Common. (The DGND connector can be open.) OPEN : Separated. In this case, DGND connector should be 0V. [AKD5386-B] -3- 2006/12 www.DataSheet4U.com ASAHI KASEI DIP Switch set up [SW1] (MODE): Setting the evaluation mode for AK5386 and AK4114 ON is “H”, OFF is “L”. CKS1 should be set by JP2. No. 1 2 3 4 5 6 Name CKS0 CKS2 DIF0 DIF1 OCKS0 OCKS1 OFF (“L”) See Table 3 MSB justified AK4114 Master mode I2S Compatible AK4114 Slave mode ON (“H”) Default L L L L H L [AKD5386-B] See Table 4 Table 2. Mode Setting CKS2 L CKS1 L CKS0 L HPF Master/Slave MCLK SCLK ≥ 48fs or 32fs L L L H H H H L H H L L H H H L H L H L H 128/192fs (Quad Speed) ON Slave 256/384fs (Double Speed) 512/768fs (Normal Speed) 128/192fs (Quad Speed) OFF Slave 256/384fs (Double Speed) 512/768fs (Normal Speed) ON Master 256fs (Double Speed) ON Master 512fs (Normal Speed) ON Master 128fs (Quad Speed) ON Master 192fs (Quad Speed) ON Master 384fs (Double Speed) ON Master 768fs (Normal Speed) Table 3. Mode Setting of AK5386 ≥ 48fs or 32fs 64fs 64fs 64fs 64fs 64fs 64fs OCKS1 0 0 1 1 OCKS0 0 1 0 1 X’tal 256fs 256fs 512fs 128fs fs (max) 96 kHz 96 kHz 48 kHz 192 kHz Table 4. MCLK Frequency Setting of AK4114 Note: AK4114 does not support MCLK=192fs/384fs/768fs. PORT1 (DSP) should be used when MCLK=192fs/384fs/768fs. The function of the toggle SW Upper-side is “H” and lower-side is “L”. [SW2] (PDN): Resets of AK5386 and AK4114. Keep “H” during normal operation. AK5386 and AK4114 is reset by making SW1(PD) "L" once at the time of the power-up. Afterwards, please make SW1(PD) "H". -4- 2006/12 www.DataSheet4U.com ASAHI KASEI Analog Input Circuits Analog signal is input via J1(RIN) and J2(LIN) of RCA connectors. [AKD5386-B] C30 R17 J1 2200p 300 RIN U4A R11 300 3 R13 300 C13 2200p R15 300 + NJM4580 C1 R19 1 51 2 10u AINR + JP7 AGND2 AGND1 J2 LIN U4B R12 300 6 5 R14 300 C16 2200p R16 300 JP7 AGND2 AGND1 Figure 2 Analog Input circuits * AKM assumes no responsibility for the trouble when using the circuit examples. -5- + C31 R18 2200p 300 NJM4580 R20 7 51 C2 10u AINL + 2006/12 www.DataSheet4U.com ASAHI KASEI MEASUREMENT RESULTS [Measurement condition] • Measurement unit : Audio Precision, System Two Cascade • MCLK : 512fs (Normal Speed) , 256fs (Double Speed) , 128fs (Quad Speed) • SCLK : 64fs • fs : 48kHz, 96kHz, 192kHz • Bit : 24bit • Measurement Frequency : Normal Speed 20Hz ~ 20kH , Double & Quad Speed 20Hz ~ 40kHz • Input Frequency : 1kHz • Power Supply : VA = 5.0V , VD = 3.3V (Using regulator) • Interface : DIT • Temperature : Room [AKD5386-B] [Measurement results] Parameter ADC Analog Input Characteristics: S/(N+D) (−1dB Input) fs=48kHz fs=96kHz fs=192kHz fs=48kHz 20kHz LPF 40kHz LPF 40kHz LPF 20kHz LPF 40kHz LPF 40kHz LPF 20kHz LPF 40kHz LPF 40kHz LPF A-weighted A-weighted A-weighted A-weighted A-weighted A-weighted - Result (Lch / Rch) 96.8 / 98.4 96.2 / 98.3 95.8 / 97.6 108.4 / 109.0 45.6 / 46.5 108.6 / 109.3 43.5 / 44.1 108.1 / 108.5 43.0 / 43.4 108.6 / 109.3 105.9 / 107.0 108.7 / 109.3 103.6 / 104.1 108.1 / 108.4 103.2 / 103.3 Unit dB D-Range (−60dB Input) fs=96kHz fs=192kHz fs=48kHz dB S/N fs=96kHz fs=192kHz dB -6- 2006/12 www.DataSheet4U.com ASAHI KASEI [Plots] fs=48kHz AKM +0 -10 -20 -30 -40 -50 -60 -70 d B F S -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100 200 500 Hz 1k 2k 5k [AKD5386-B] AK5386 FFT VA=5V, VD=3.3V, fs=48kHz, MCLK=512fs, -1dBFS input, fin=1kHz 10k 20k Figure 3 FFT (1kHz, –1dB input) AKM +0 -10 -20 -30 -40 -50 -60 -70 d B F S -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 AK5386 FFT VA=5V, VD=3.3V, fs=48kHz, MCLK=512fs, fin=No signal 100 200 500 Hz 1k 2k 5k 10k 20k Figure 4 FFT (1kHz, –60dB input) -7- 2006/12 www.DataSheet4U.com ASAHI KASEI [AKD5386-B] AKM +0 -10 -20 -30 -40 -50 -60 -70 d B F S -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 AK5386 FFT VA=5V, VD=3.3V, fs=48kHz, MCLK=512fs, fin=No signal 100 200 500 Hz 1k 2k 5k 10k 20k Figure 5 FFT (off the input) AKM -70 AK5386 THD+N vs. Input Level VA=5V, VD=3.3V, fs=48kHz, MCLK=512fs, fin=1kHz -75 -80 -85 -90 d B F S -95 -100 -105 -110 -115 -120 -120 -110 -100 -90 -80 -70 -60 dBr -50 -40 -30 -20 -10 +0 Figure 6 THD+N vs Input Level (1kHz input) -8- 2006/12 www.DataSheet4U.com ASAHI KASEI [AKD5386-B] AKM AK5386 THD+N vs. Input Frequency VA=5V, VD=3.3V, fs=48kHz, MCLK=512fs, -1dBFS input -80 -82.5 -85 -87.5 -90 -92.5 -95 d B F S -97.5 -100 -102.5 -105 -107.5 -110 -112.5 -115 -117.5 -120 20 50 100 200 500 Hz 1k 2k 5k 10k 20k Figure 7 THD+N vs Input Frequency (-1dB input) AKM +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -140 AK5386 Linearity VA=5V, VD=3.3V, fs=48kHz, MCLK=512fs, fin=1kHz d B F S -130 -120 -110 -100 -90 -80 -70 dBr -60 -50 -40 -30 -20 -10 +0 Figure 8 Linearity (fin=1kHz) -9- 2006/12 www.DataSheet4U.com ASAHI KASEI [AKD5386-B] AKM AK5386 Frequency Response VA=5V, VD=3.3V, fs=48kHz, MCLK=512fs, -1dBFS input +0 -0.2 -0.4 -0.6 -0.8 d B F S -1 -1.2 -1.4 -1.6 -1.8 -2 20 50 100 200 500 Hz 1k 2k 5k 10k 20k Figure 9 Frequency Response (-1dB input) AKM AK5386 Crosstalk (Red=Lch, Blue=Rch) VA=5V, VD=3.3V, fs=48kHz, MCLK=512fs, -1dBFS input -70 -75 -80 -85 -90 -95 -100 d B -105 -110 -115 -120 -125 -130 -135 -140 20 50 100 200 500 Hz 1k 2k 5k 10k 20k Figure 10 Cross-talk (-1dB input) - 10 - 2006/12 www.DataSheet4U.com ASAHI KASEI fs=96kHz AKM +0 -10 -20 -30 -40 -50 -60 -70 d B F S -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 40 50 100 200 500 1k Hz 2k 5k 10k [AKD5386-B] AK5386 FFT VA=5V, VD=3.3V, fs=96kHz, MCLK=256fs, -1dBFS input, fin=1kHz 20k 40k Figure 11 FFT (1kHz, –1dB input) AKM +0 -10 -20 -30 -40 -50 -60 -70 d B F S -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 40 50 100 AK5386 FFT VA=5V, VD=3.3V, fs=96kHz, MCLK=256fs, -60dBFS input, fin=1kHz 200 500 1k Hz 2k 5k 10k 20k 40k Figure 12 FFT (1kHz, –60dB input) - 11 - 2006/12 www.DataSheet4U.com ASAHI KASEI [AKD5386-B] AKM +0 -10 -20 -30 -40 -50 -60 -70 d B