Asahi KASEI AKD4382A-SB User manual

[AKD4382A-SB]
<KM089400> 1 2007/06
General Description
The AKD4382A-SB is an evaluation board for AK4382A, which is 192kHz sampling 24Bit ΔΣ DAC. The
AKD4382A-SB includes a LPF which can add differential analog outputs from the AK4382A and also has a
digital interface. Therefore, it is easy to evaluate the AK4382A.
Ordering Guide
AKD4382A-SB --- Evaluation board for AK4382A
Function
On-board Analog output buffer circuit
On-board digital audio interface. (AK4113)
AK4382A
AK4113
COAX In
Rch
Lch
DIR
Opt In
2nd Order
LPF
AGND -15V
+3.3V Reg
+15V
Reg +5V
PORT1
EXT
PORT2
Control
Data
Figure 1. Block diagram
* Circuit diagram are attached at the end of this manual.
COAX is recommended for an evaluation of the Sound quality.
AK4382A Evaluation board Rev.0
A
KD4382A-SB

[AKD4382A-SB]
<KM089400> 2 2007/06
Operation sequence
1) Set up the power supply lines. (See “Other jumpers set-up”.)
Name Color Voltage Comments Attention
+15V Red
+12∼+15V For regulator and op-amps. This jack should be always connected to power
supply.
-15V Blue
-12∼-15V For op-amps. This jack should be always connected to power
supply.
AGND Black 0V GND This jack should be always connected to power
supply.
Table 1. Set up of power supply lines
Each supply line should be distributed from the power supply unit.
2) Set-up the jumper pins
3) Set-up the DIP switches. (See the followings.)
4) Power on
The AK4382A should be reset once by bringing SW1 (PDN) “L” upon power-up.

[AKD4382A-SB]
<KM089400> 3 2007/06
Evaluation mode
1. DIR (COAX) (default)
It is possible to evaluate the AK4382A 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.
COAX is recommended for an evaluation of the Sound quality.
JP4
OPT
COAX
RX
(Default)
Figure 2. Jumper setting, when using DIR
2. DIR (Optical Link)
It is possible to evaluate the AK4382A by using CD disk. The DIR generates MCLK, BICK, LRCK and SDATA from the received
data through optical connector (PORT3: TORX176). Setting of jumper is shown below.
JP4
OPT
COAX
RX
Figure 3. Jumper setting, when using DIR
3. All clocks are fed through the PORT1.
R13, R15, R17, R18 : open
R1, R2, R3, R8 : 100Ωor short (0Ω)
DIP Switch setting
[SW2]: AK4113 setting
No. Pin OFF ON Default
1 OCKS1 ON
2 OCKS0
AK4113 Master Clock setting
Refer to Table4 OFF
Table 2. SW2 setting
The frequency of the master clock output is set by OCKS0 and OCKS1 as shown in Table 4.
OCKS1 OCKS0 MCLK Frequency
0 0 256fs @fs=88.2/96kHz
1 0 512fs @32/44.1/48kHz
1 1 128fs @176.4/192kHz
Default
Table 3. MCLK Clock

[AKD4382A-SB]
<KM089400> 4 2007/06
SW1 setting
[SW1](PDN): Reset of AK4382A. Select “H” during operation.
External Analog Filter Circuit
The 2nd order LPF (fc=93.2kHz, Q=0.712) which adds differential outputs of the AK4382A 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. And the output level of the AK4382A is 5.5Vpp@5V.
LOUT-
(ROUT-)
-
LOUT+
(ROUT+)
+15V
-15V
OP275
R1
C1
R3
R2
C2
R1R
3
R2C2
10u
10k
+
220
Figure 4. On-board analog filter
R1R
2R 3C 1C 2
4.7k 4.7k 200 3900p 470p
Table 4. The value of R, C on this board
fin 20kHz 40kHz 80kHz
Frequency Response -0.003dB -0.122dB -1.821dB
Table 5. Frequency Response of LPF
<Calculation>
fc= ω0
2π,
ω0= 1
2C1C2R2R3
,
Q= 2C1
ω
0.
+
1
R1+
1
R2
1
R3
Amplitude = 20 log [1-(f/fc)2]2+[(1/Q)(f/fc)] 2
K [dB],
K= R2
R1,

[AKD4382A-SB]
<KM089400> 5 2007/06
Control Software Manual
Set-up of evaluation board and control software
1. Set up the AKD4382A-SB according to previous term.
2. Connect IBM-AT compatible PC with AKD4382A-SB by 10-line type flat cable (packed with AKD4382A-SB).
Take care of the direction of 10pin header. (Please install the driver in the CD-ROM when this control software is
used on Windows 2000/XP. Please refer “Installation Manual of Control Software Driver by AKM device control
software”. In case of Windows95/98/ME, this installation is not needed. This control software does not operate on
Windows NT.)
3. Insert the CD-ROM labeled “AKD4382A-SB Evaluation Kit” into the CD-ROM drive.
4. Access the CD-ROM drive and double-click the icon of “AKD4382A-SB.exe” to set up the control program.
5. Then please evaluate according to the follows.
Operation flow
Keep the following flow.
1. Set up the control program according to explanation above.
2. Click “Port Reset” button.
Explanation of each buttons
1. [Port Reset] : Set up the USB interface board (AKDUSBIF-A) in case using the board.
2. [Write default] : Initialize the register of AK4382A.
3. [All Write] : Write all registers that is currently displayed.
4. [Function1] : Dialog to write data by keyboard operation.
5. [Function2] : Dialog to write data by keyboard operation.
6. [Function3] : The sequence of register setting can be set and executed.
7. [Function4] : The sequence that is created on [Function3] can be assigned to buttons and
executed.
8. [Function5]: The register setting that is created by [SAVE] function on main window can
be assigned to buttons and executed.
9. [SAVE] : Save the current register setting.
10. [OPEN] : Write the saved values to all register.
11. [Write] : Dialog to write data by mouse operation.
Indication of data
Input data is indicated on the register map. Red letter indicates “H” or “1” and blue one indicates “L” or “0”. Blank is
the part that is not defined in the datasheet.

[AKD4382A-SB]
<KM089400> 6 2007/06
Explanation of each dialog
1. [Write Dialog] : Dialog to write data by mouse operation
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” or “1”. If not, “L” or “0”.
When writing the input data to AK4382A, click [OK] button. If not, click [Cancel] button.
2. [Function1 Dialog] : Dialog to write data by keyboard operation
Address Box: Input registers address in 2 figures of hexadecimal.
Data Box: Input registers data in 2 figures of hexadecimal.
When writing the input data to AK4382A, click [OK] button. If not, click [Cancel] button.
3. [Function2 Dialog] : Dialog to evaluate ATT
Address Box: Input registers address in 2 figures of hexadecimal.
Start Data Box: Input starts data in 2 figures of hexadecimal.
End Data Box: Input end data in 2 figures of hexadecimal.
Interval Box: Data is written to AK4642 by this interval.
Step Box: Data changes by this step.
Mode Select Box:
With checking this check box, data reaches end data, and returns to start data.
[Example] Start Data = 00, End Data = 09
Data flow: 00 01 02 03 04 05 06 07 08 09 09 08 07 06 05 04 03 02 01 00
Without checking this check box, data reaches end data, but does not return to start data.
[Example] Start Data = 00, End Data = 09
Data flow: 00 01 02 03 04 05 06 07 08 09
When writing the input data to AK4382A, click [OK] button. If not, click [Cancel] button.

[AKD4382A-SB]
<KM089400> 7 2007/06
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”.
4-2. [Open]
The register setting data saved by [Save] is written to AK4382A. The file type is the same as [Save].
(Operation flow)
(1) Click [Open] Button.
(2) Select the file (*.akr) and Click [Open] Button.

[AKD4382A-SB]
<KM089400> 8 2007/06
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.
(3) Click [Start] button. Then this sequence is executed.
The sequence is paused at the step of Interval="-1". Click [START] button, the sequence restarts from the paused step.
This sequence can be saved and opened by [Save] and [Open] button on the Function3 window. The extension of file
name is “aks”.
Figure 5. Window of [F3]

[AKD4382A-SB]
<KM089400> 9 2007/06
6. [Function4 Dialog]
The sequence that is created on [Function3] can be assigned to buttons and executed. When [F4] button is clicked, the
window as shown in Figure 6 opens.
Figure 6. [F4] window

[AKD4382A-SB]
<KM089400> 10 2007/06
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 7.
Figure 7. [F4] window (2)
(2) Click [START] button, then the sequence is executed.
6-2. [SAVE] and [OPEN] buttons on right side
[SAVE] : The sequence file names can assign be saved. The file name is *.ak4.
[OPEN] : The sequence file names assign that are saved in *.ak4 are loaded.
6-3. Note
(1) This function doesn't support the pause function of sequence function.
(2) All files need to be in same folder used by [SAVE] and [OPEN] function on right side.
(3) When the sequence is changed in [Function3], the file should be loaded again in order to reflect the change.

[AKD4382A-SB]
<KM089400> 11 2007/06
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 Figure 8opens.
Figure 8. [F5] window
7-1. [OPEN] buttons on left side and [WRITE] button
(1) Click [OPEN] button and select the register setting file (*.akr).
(2) Click [WRITE] button, then the register setting is executed.
7-2. [SAVE] and [OPEN] buttons on right side
[SAVE] : The register setting file names assign can be saved. The file name is *.ak5.
[OPEN] : The register setting file names assign that are saved in *.ak5 are loaded.
7-3. Note
(1) All files need to be in same folder used by [SAVE] and [OPEN] function on right side.
(2) When the register setting is changed by [Save] Button in main window, the file should be loaded again in order to reflect the
change.

[AKD4382A-SB]
<KM089400> 12 2007/06
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, 192kHz
•Bit : 24bit
•Power Supply : VDD=5V
•Interface : Internal DIR (44.1kHz, 96kHz, 192kHz)
•Temperature : Room
fs=44.1kHz
Parameter Input signal Measurement filter Lch Rch
S/(N+D) 1kHz, 0dB 20kLPF 93.5 dB 94.1 dB
DR 1kHz, -60dB 22kLPF, A-weighted 112.5 dB 112.5 dB
S/N “0” data 22kLPF, A-weighted 112.5 dB 112.4 dB
fs=96kHz
Parameter Input signal Measurement filter Lch Rch
S/(N+D) 1kHz, 0dB 40kLPF 92.1 dB 92.6 dB
40kLPF 105.0 dB 104.9 dB
DR 1kHz, -60dB
22kLPF, A-weighted 112.6 dB 112.6 dB
40kLPF 105.1 dB 105.0 dB
S/N “0” data
22kLPF, A-weighted 112.9 dB 112.9 dB
fs=192kHz
Parameter Input signal Measurement filter Lch Rch
S/(N+D) 1kHz, 0dB 40kLPF 91.0 dB 91.5 dB
40kLPF 104.3 dB 104.3 dB
DR 1kHz, -60dB
22kLPF, A-weighted 111.6 dB 111.6 dB
40kLPF 105.0 dB 104.9 dB
S/N “0” data
22kLPF, A-weighted 112.7 dB 112.6 dB

[AKD4382A-SB]
<KM089400> 13 2007/06
Plots (fs=44.1kHz)
AKM AK4382A FFT
VDD=5V, fs=44.1kHz, fin=1kHz, 0dBFS input
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
Hz
Figure 9. FFT (fin=1kHz, 0dBFS input)
AKM AK4382A FFT
VDD=5V, fs=44.1kHz, fin=1kHz, -60dBFS input
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
Hz
Figure 10. FFT (fin=1kHz, -60dBFS input)

[AKD4382A-SB]
<KM089400> 14 2007/06
(fs=44.1kHz)
AKM AK4382A FFT
VDD=5V, fs=44.1kHz, No signal input
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
Hz
Figure 11. FFT (Noise Floor)
AKM AK4382A FFT Out of band noise
VDD=5V, fs=44.1kHz, No signal input
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 100k50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
Figure 12. FFT (Out of band noise)

[AKD4382A-SB]
<KM089400> 15 2007/06
(fs=44.1kHz)
AKM AK4382A THD+N vs. Input Level
VDD=5V, fs=44.1kHz, fin=1kHz
-120
-70
-115
-110
-105
-100
-95
-90
-85
-80
-75
d
B
r
A
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
Figure 13 . THD+N vs. Input level (fin=1kHz)
AKM AK4382A THD+N vs. Input Frequency
VDD=5V, fs=44.1kHz, 0dBFS input
-120
-70
-115
-110
-105
-100
-95
-90
-85
-80
-75
d
B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
Hz
Figure 14 . THD+N vs. Input Frequency (0dBFS input)

[AKD4382A-SB]
<KM089400> 16 2007/06
(fs=44.1kHz)
AKM AK4382A Linearity
VDD=5V, fs=44.1kHz, fin=1kHz
-120
+0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
Figure 15. Linearity (fin=1kHz)
AKM AK4382A Frequency Response
VDD=5V, fs=44.1kHz, 0dBFS input
-1
+1
-0.9
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
+0
+0.1
+0.2
+0.3
+0.4
+0.5
+0.6
+0.7
+0.8
+0.9
d
B
r
A
2k 20k4k 6k 8k 10k 12k 14k 16k 18k
Hz
Figure 16. Frequency Response (0dBFS input)

[AKD4382A-SB]
<KM089400> 17 2007/06
(fs=44.1kHz)
AKM AK4382A Crosstalk (Red=Lch, Blue=Rch)
VDD=5V, fs=44.1kHz, 0dBFS input
-140
-70
-135
-130
-125
-120
-115
-110
-105
-100
-95
-90
-85
-80
-75
d
B
20 20k50 100 200 500 1k 2k 5k 10k
Hz
Figure 17. Crosstalk (0dBFS input)

[AKD4382A-SB]
<KM089400> 18 2007/06
(fs=96kHz)
AKM AK4382A FFT
VDD=5V, fs=96kHz, fin=1kHz, 0dBFS input
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
40 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
Figure 18. FFT (fin=1kHz, 0dBFS input)
AKM AK4382A FFT NotchFilter = ON
VDD=5V, fs=96kHz, fin=1kHz, 0dBFS input
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
40 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
Figure 19. FFT(fin=1kHz, 0dBFS input, Notch)

[AKD4382A-SB]
<KM089400> 19 2007/06
(fs=96kHz)
AKM AK4382A FFT
VDD=5V, fs=96kHz, fin=1kHz, -60dBFS input
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
40 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
Figure 20. FFT (fin=1kHz, -60dBFS input)
AKM AK4382A FFT
VDD=5V, fs=96kHz, No signal input
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
40 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
Figure 21. FFT (Noise Floor)

[AKD4382A-SB]
<KM089400> 20 2007/06
(fs=96kHz)
AKM AK4382A THD+N vs. Input Level
VDD=5V, fs=96kHz, fin=1kHz
-120
-70
-115
-110
-105
-100
-95
-90
-85
-80
-75
d
B
r
A
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
Figure 22. THD+N vs. Input level (fin=1kHz)
AKM AK4382A THD+N vs. Input Frequency
VDD=5V, fs=96kHz, 0dBFS input
-120
-70
-115
-110
-105
-100
-95
-90
-85
-80
-75
d
B
r
A
40 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
Figure 23. THD+N vs. Input Frequency (0dBFS input)