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AKM AKD4385-SC Instruction Manual

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ASAHI KASEI
The AKD4385-SC is an evaluation board for AK4385, which is 192kHz sampling 24Bit ∆Σ DAC. The
AKD4385-SC 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-SC --- Evaluation board for AK4385
On-board Analog output buffer circuit
On-board digital audio interface. (AK4113)
+15V
Reg
DIR
COAX In
Opt In
PORT1
EXT
PORT2
Control
Data
* Circuit diagram and PCB layout are attached at the end of this manual.
<KM082701>
General Description
Function
+3.3V
+5V
Reg
AK4113
AK4385
Figure 1. Block diagram
COAX is recommended for an evaluation of the Sound quality.
AK4385 Evaluation board Rev.1
AGND -15V
2nd Order
LPF
1
[AKD4385-SC]
AKD4385-SC
Lch
Rch
2006/04

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Summary of Contents for AKM AKD4385-SC

  • Page 1 The AKD4385-SC is an evaluation board for AK4385, which is 192kHz sampling 24Bit ∆Σ DAC. The AKD4385-SC 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.

  • Page 2: Operation Sequence

    ASAHI KASEI [AKD4385-SC] Operation sequence 1) Set up the power supply lines. (See “Other jumpers set-up”.) Name Color Voltage Comments Attention This jack should be always connected to power +15V +12∼+15V For regulator and op-amps. supply. This jack should be always connected to power...

  • Page 3: Evaluation Mode

    ASAHI KASEI [AKD4385-SC] Evaluation mode 1. DIR (COAX) (default) It is possible to evaluate the AK4385 by using CD disk. The DIR generates MCLK, BICK, LRCK and SDATA from the received data through BNC connector (J1). Setting of jumper is shown below.
  • Page 4 ASAHI KASEI [AKD4385-SC] SW1 setting [SW1](PDN): Reset of AK4385. Select “H” during operation External Analog Filter 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-of-band noise is needed, some additional LPF is required. Analog signal is output through BNC connectors on the board.
  • Page 5 Windows NT.) 3. Insert the CD-ROM labeled “AKD4385-SC Evaluation Kit” into the CD-ROM drive. 4. Access the CD-ROM drive and double-click the icon of “AKD4385-SC.exe” to set up the control program. 5. Then please evaluate according to the follows. Operation flow Keep the following flow.
  • Page 6 ASAHI KASEI [AKD4385-SC] Explanation of each dialog : Dialog to write data by mouse operation 1. [Write Dialog] There are dialogs corresponding to each register. Click the [Write] button corresponding to each register to set up the dialog. If you check the check box, data becomes “H”...

  • Page 7: Save] And [Open]

    ASAHI KASEI [AKD4385-SC] 4. [Save] and [Open] 4-1. [Save] Save the current register setting data. The extension of file name is “akr”. (Operation flow) (1) Click [Save] Button. (2) Set the file name and push [Save] Button. The extension of file name is “akr”.
  • Page 8 ASAHI KASEI [AKD4385-SC] 5. [Function3 Dialog] The sequence of register setting can be set and executed. (1) Click [F3] Button. (2) Set the control sequence. Set the address, Data and Interval time. Set “-1” to the address of the step where the sequence should be paused.
  • Page 9 ASAHI KASEI [AKD4385-SC] 6. [Function4 Dialog] The sequence that is created on [Function3] can be assigned to buttons and executed. When [F4] button is clicked, as shown in opens. window Figure 5 Figure 5. [F4] window <KM082701> 2006/04...
  • Page 10 ASAHI KASEI [AKD4385-SC] 6-1. [OPEN] buttons on left side and [START] buttons (1) Click [OPEN] button and select the sequence file (*.aks). The sequence file name is displayed as shown in Figure 6 Figure 6. [F4] window(2) (2) Click [START] button, then the sequence is executed.
  • Page 11 ASAHI KASEI [AKD4385-SC] 7. [Function5 Dialog] The register setting that is created by [SAVE] function on main window can be assigned to buttons and executed. When [F5] button is clicked, the following window as shown in opens. Figure 7 Figure 7. [F5] window 7-1.

  • Page 12: Measurement Results

    ASAHI KASEI [AKD4385-SC] Measurement Results [Measurement condition] • Measurement unit : Audio Precision System two Cascade (AP2) • MCLK : 512fs (44.1kHz), 256fs (96kHz), 128fs (192kHz) • BICK : 64fs • fs : 44.1kHz, 96kHz • Bit : 24bit • Power Supply : VDD=5V •...
  • Page 13 ASAHI KASEI [AKD4385-SC] Plots (fs=44.1kHz) AK4385 FFT VDD=5V, fs=44.1kHz, MCLK=512, 0dBFS input, fin=1kHz -100 -110 -120 -130 -140 -150 -160 -170 -180 Figure 8. FFT (fin=1kHz, 0dBFS input) AK4385 FFT VDD=5V, fs=44.1kHz, MCLK=512, -60dBFS input, fin=1kHz -100 -110 -120 -130...
  • Page 14 ASAHI KASEI [AKD4385-SC] (fs=44.1kHz) AK4385 FFT VDD=5V, fs=44.1kHz, MCLK=512, fin=No signal -100 -110 -120 -130 -140 -150 -160 -170 -180 Figure 10. FFT (Noise Floor) AK4385 FFT Out-of-band noise VDD=5V, fs=44.1kHz, MCLK=512fs, fin=No signal -100 -110 -120 -130 -140 -150...
  • Page 15 ASAHI KASEI [AKD4385-SC] (fs=44.1kHz) AK4385 THD+N vs. Input Level VDD=5V,fs=44.1kHz, MCLK=512fs, fin=1kHz -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 12 . THD+N vs. Input level (fin=1kHz) AK4385 THD+N vs. Input Frequency VDD=5V, fs=44.1kHz, MCLK=512fs, 0dBFS input -100...
  • Page 16 ASAHI KASEI [AKD4385-SC] (fs=44.1kHz) AK4385 Linearity VDD=5V fs=44.1kHz, MCLK=512fs, fin=1kHz -100 -110 -120 -120 -110 -100 dBFS Figure 14. Linearity (fin=1kHz) AK4385 Frequency Response VDD=5V, fs=44.1kkHz, MCLK=512fs, 0dBFS input +0.9 +0.8 +0.7 +0.6 +0.5 +0.4 +0.3 +0.2 +0.1 -0.1 -0.2 -0.3...
  • Page 17 ASAHI KASEI [AKD4385-SC] (fs=44.1kHz) AK4385 Crosstalk (Red=Lch, Blue=Rch) VDD=5V, fs=44.1kHz, MCLK=512fs, 0dBFS input -100 -105 -110 -115 -120 -125 -130 -135 -140 Figure 16. Crosstalk (0dBFS input) <KM082701> 2006/04...
  • Page 18 ASAHI KASEI [AKD4385-SC] (fs=96kHz) AK4385 FFT VDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input, fin=1kHz -100 -110 -120 -130 -140 -150 -160 -170 -180 Figure 17. FFT (fin=1kHz, 0dBFS input) AK4385 FFT fs=96kHz, MCLK=256fs, fin=1kHz, 0dBFS input, Notch=ON -100 -110 -120 -130 -140...
  • Page 19 ASAHI KASEI [AKD4385-SC] (fs=96kHz) AK4385 FFT VDD=5V, fs=96kHz, MCLK=256fs, -60dBFS input, fin=1kHz -100 -110 -120 -130 -140 -150 -160 -170 -180 Figure 19. FFT (fin=1kHz, -60dBFS input) AK4385 FFT VDD=5V, fs=96kHz, fin=No signal -100 -110 -120 -130 -140 -150 -160...
  • Page 20 ASAHI KASEI [AKD4385-SC] (fs=96kHz) AK4385 THD+N vs. Input Level VDD=5V, fs=96kHz, MCLK=256fs, fin=1kHz -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 21. THD+N vs. Input level (fin=1kHz) AK4385 THD+N vs. Input Frequency VDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input -100...
  • Page 21 ASAHI KASEI [AKD4385-SC] (fs=96kHz) AK4385 Linearity VDD=5V, fs=96kHz, MCLK=256fs, fin=1kHz -100 -110 -120 -130 -130 -120 -110 -100 dBFS Figure 23. Linearity (fin=1kHz) AK4385 Frequency Response VDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input +0.9 +0.8 +0.7 +0.6 +0.5 +0.4 +0.3 +0.2 +0.1 -0.1...
  • Page 22 ASAHI KASEI [AKD4385-SC] (fs=96kHz) AK4385 Crosstalk (Red=Lch, Blue=Rch) VDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input -100 -105 -110 -115 -120 -125 -130 -135 -140 Figure 25. Crosstalk (0dBFS input) <KM082701> 2006/04...
  • Page 23 ASAHI KASEI [AKD4385-SC] (fs=192kHz) AK4385 FFT VDD=5V, fs=192kHz, MCLK=128fs, 0dBFS input, fin=1kHz -100 -110 -120 -130 -140 -150 -160 -170 -180 Figure 26. FFT (fin=1kHz, 0dBFS input) AK4385 FFT VDD=5V, fs=192kHz, MCLK=128fs, 0dBFS input, fin=1kHz, Notch=ON -100 -110 -120 -130...
  • Page 24 ASAHI KASEI [AKD4385-SC] (fs=192kHz) AK4385 FFT VDD=5V, fs=192kHz, MCLK=128fs, -60dBFS input, fin=1kHz -100 -110 -120 -130 -140 -150 -160 -170 -180 Figure 28. FFT (fin=1kHz, -60dBFS input) AK4385 FFT VDD=5V, fs=192kHz, MCLK=128fs, fin=No signal -100 -110 -120 -130 -140 -150...
  • Page 25 ASAHI KASEI [AKD4385-SC] (fs=192kHz) AK4385 THD+N vs. Input Level VDD=5V, fs=192kHz, MCLK=128fs, fin=1kHz -100 -105 -110 -115 -120 -120 -110 -100 dBFS Figure 30. THD+N vs. Input level (fin=1kHz) AK4385 THD+N vs. Input Frequency VDD=5V, fs=192kHz, MCLK=128fs, 0dBFS input -100...
  • Page 26 ASAHI KASEI [AKD4385-SC] (fs=192kHz) AK4385 Linearity VDD=5V, fs=192kHz, MCLK=128fs, fin=1kHz -100 -110 -120 -130 -130 -120 -110 -100 dBFS Figure 32. Linearity (fin=1kHz) AK4385 Frequency Response VDD=5V, fs=192kHz, MCLK=128fs, 0dBFS input +0.8 +0.6 +0.4 +0.2 -0.2 -0.4 -0.6 -0.8 -1.2 -1.4...
  • Page 27 ASAHI KASEI [AKD4385-SC] (fs=192kHz) AK4385 Crosstalk (Red=Lch, Blue=Rch) VDD=5V, fs=192kHz, MCLK=128fs, 0dBFS input -100 -105 -110 -115 -120 -125 -130 -135 -140 Figure 34. Crosstalk (0dBFS input) <KM082701> 2006/04...

  • Page 28: Important Notice

    • 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...
  • Page 29 AVDD PORT2 PORT2 CCLK CDTI uP-I/F uP-I/F 0.1u 0.1u 74LVC157 74LVC157 Title Title Title AKD4385-SC AKD4385-SC AKD4385-SC Size Size Size Document Number Document Number Document Number AK4385 AK4385 AK4385 Date: Date: Date: Thursday, January 12, 2006 Thursday, January 12, 2006...
  • Page 30 3900p AOUTR AOUTR AOUTR+ NJM4580 NJM4580 4.7K 4.7K 4.7K 4.7K 470p 470p VOP+ Title Title Title AKD4385-SC AKD4385-SC AKD4385-SC Size Size Size Document Number Document Number Document Number Analog Analog Analog Date: Date: Date: Thursday, January 12, 2006 Thursday, January 12, 2006...
  • Page 31 AVDD AK4113 AK4113 PORT3 PORT3 short short TORX173 TORX173 0.1u 0.1u Title Title Title AKD4385-SC AKD4385-SC AKD4385-SC Size Size Size Document Number Document Number Document Number Date: Date: Date: Thursday, January 12, 2006 Thursday, January 12, 2006 Thursday, January 12, 2006...