AKM AKD4556-B User manual

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 1 -
GENERAL DESCRIPTION
The AKD4556-B is an evaluation board for the AK4556, the 24Bit A/D & D/A converter. The AKD4556-B
can evaluate A/D converter and D/A converter separately in addition to loopback mode (A/D→D/A). The
AKD4556-B also has the digital audio interface and can achieve the interface with digital audio systems
via opt-connector.
Ordering guide
AKD4556-B --- Evaluation board for AK4556
FUNCTION
Digital interface
- DIT (AK4114): optical or BNC
- DIR (AK4114): optical or BNC
10pin header for serial control interface
AK4114
(DIR&DIT)
Opt In
Opt Out
A
K4556
5V
LIN
RIN
LOUT
ROUT 10pin Header
DSP
GND
Regulator
BNC
BNC
Figure 1. AKD4556-B Block Diagram
* Circuit diagram and PCB layout are attached at the end of this manual.
AK4556 Evaluation board Rev.1
A
KD4556-B

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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Evaluation Board Manual
Operation sequence
1) Set up the power supply lines
[5V] (red) = +5V (3.3V is supplied to the AK4556 , the AK4114 , and the Digital Logic via the
regulator.)
[GND] (black) = 0V
2) Set up the evaluation modes, jumper pins and DIP switch. (See the followings.)
3) Power on
The AK4556 should be reset once bringing SW1 (PDN) “L” upon power-up.
The function of the toggle SW.
[SW1] : Resets the AK4556 & AK4114. Keep “H” during normal operation.

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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Evaluation modes
In case of the AK4556 evaluation using the AK4114, it is necessary to correspond to the audio interface format.
RX and TX use BNC connector at evaluation of Quad Speed with the AK4114.
Applicable evaluation modes
(1) Evaluation of Loopback mode using the AK4114 <default>
(2) Evaluation of DAC using DIR of the AK4114
(3) Evaluation of ADC using DIT of the AK4114
(4) All interface signals including master clock are fed externally.
(1) Evaluation of Loopback mode using the AK4114
X’tal oscillator (X1) 24.576MHz is used.
(1-1) Slave mode <Default>
JP1 : Short
JP2 : Short
SW3-1 (XTL1) : H
SW3-2 (XTL0) : L
SW3-7 (CM0) : H
For the AK4556’s sampling speed and audio interface format, refer to Table 3 on page 8.
For the AK4114’s sampling speed and audio interface format, refer to Table 6 and Table 7 on page 9.
Example . Setting of the AK4556 mode 4 (HPF:ON , Audio Format: I2S)
SW2 AK4556 SW3 AK4114
CKS3 CKS2 CKS1 CKS0 DIF1 DIF0 OCKS1 OCKS0
Speed
(SW2-3) (SW2-4) (SW2-5) (SW2-6) (SW3-3) (SW3-4) (SW3-5) (SW3-6)
Normal L H L L L H H L
Double L H L L L H L L
Quad L H L L L H H H
(1-2) Master mode
JP1 : Short
JP2 : Short
SW3-1 (XTL1) : H
SW3-2 (XTL0) : L
SW3-3 (DIF1) : H
SW3-4 (DIF0) : H
SW3-7 (CM0) : H
For the AK4556’s sampling speed and audio interface format, refer to Table 3 on page 8.
For the AK4114’s sampling speed and audio interface format, refer to Table 6 and Table 7 on page 9.
Example . Setting of the AK4556 Master mode (HPF:ON , Audio Format: I2S)
SW2 AK4556 SW3 AK4114
CKS3 CKS2 CKS1 CKS0 OCKS1 OCKS0
Speed
(SW2-3) (SW2-4) (SW2-5) (SW2-6) (SW3-5) (SW3-6)
Normal H H L H H L
Double H H L L L L
Quad H H H L H H

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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(2) Evaluation of DAC using DIR of the AK4114
DIR generates MCLK , BCLK , LRCK , and SDATA from received data via optical (PORT1) or BNC connector (J6).
(2-1) Slave mode
JP1 : Short
JP2 : Short
JP3 : OPT or BNC
SW3-1 (XTL1) : H
SW3-2 (XTL0) : H
SW3-7 (CM0) : L
For the AK4556’s sampling speed and audio interface format, refer to Table 3 on page 8.
For the AK4114’s sampling speed and audio interface format, refer to Table 6 and Table 7 on page 9.
Example . Setting of the AK4556 mode 4 (HPF:ON , Audio Format: I2S)
SW2 AK4556 SW3 AK4114
CKS3 CKS2 CKS1 CKS0 DIF1 DIF0 OCKS1 OCKS0
Speed
(SW2-3) (SW2-4) (SW2-5) (SW2-6) (SW3-3) (SW3-4) (SW3-5) (SW3-6)
Nomal L H L L L H H L
Double L H L L L H L L
Quad L H L L L H H H
(2-2) Master mode
JP1 : Short
JP2 : Short
JP3 : OPT or BNC
SW3-1 (XTL1) : H
SW3-2 (XTL0) : H
SW3-3 (DIF1) : H
SW3-4 (DIF0) : H
SW3-7 (CM0) : L
For the AK4556’s sampling speed and audio interface format, refer to Table 3 on page 8.
For the AK4114’s sampling speed and audio interface format, refer to Table 6 and Table 7 on page 9.
Example . Setting of the AK4556 Master mode (HPF:ON , Audio Format: I2S)
SW2 AK4556 SW3 AK4114
CKS3 CKS2 CKS1 CKS0 OCKS1 OCKS0
Speed
(SW2-3) (SW2-4) (SW2-5) (SW2-6) (SW3-5) (SW3-6)
Normal H H L H H L
Double H H L L L L
Quad H H H L H H

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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(3) Evaluation of ADC using DIT of the AK4114
Optical (PORT2) or BNC (J7) connector is used. DIT generates audio bi-phase signal.
(3-1) Slave mode
(3-1-1) When using the AK4114’s PLL
Optical (PORT1) or BNC (J6) connector provides access to the bi-phase signal generated by the AK4114.
JP1 : Short
JP2 : Short
JP3,JP4 : OPT or BNC
SW3-1 (XTL1) : H
SW3-2 (XTL0) : H
SW3-7 (CM0) : L
(3-1-2) When using X’tal oscillator (X1) 24.576MHz
JP1 : Short
JP2 : Short
JP4 : OPT or BNC
SW3-1 (XTL1) : H
SW3-2 (XTL0) : L
SW3-7 (CM0) : H
For the AK4556’s sampling speed and audio interface format, refer to Table 3 on page 8.
For the AK4114’s sampling speed and audio interface format, refer to Table 6 and Table 7 on page 9.
Example . Setting of the AK4556 Mode 8 (HPF:ON , Audio Format:LJ)
SW2 AK4556 SW3 AK4114
CKS3 CKS2 CKS1 CKS0 DIF1 DIF0 OCKS1 OCKS0
Speed
(SW2-3) (SW2-4) (SW2-5) (SW2-6) (SW3-3) (SW3-4) (SW3-5) (SW3-6)
Normal H L L L L L H L
Double H L L L L L L L
Quad H L L L L L H H

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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(3-2) Master mode
(3-2-1) When using the AK4114’s PLL
Optical (PORT1) or BNC (J6) connector provides access to the bi-phase signal generated by the AK4114.
JP1 : Short
JP2 : Short
JP3,JP4 : OPT or BNC
SW3-1 (XTL1) : H
SW3-2 (XTL0) : H
SW3-3 (DIF1) : H
SW3-4 (DIF0) : H
SW3-7 (CM0) : L
(3-2-2) When using X’tal oscillator (X1) 24.576MHz
JP1 : Short
JP2 : Short
JP4 : OPT or BNC
SW3-1 (XTL1) : H
SW3-2 (XTL0) : L
SW3-3 (DIF1) : H
SW3-4 (DIF0) : H
SW3-7 (CM0) : H
For the AK4556’s sampling speed and audio interface format, refer to Table 3 on page 8.
For the AK4114’s sampling speed and audio interface format, refer to Table 6 and Table 7 on page 9.
Example . Setting of the AK4556 Master Mode (HPF:ON , Audio Format: I2S)
SW2 AK4556 SW3 AK4114
CKS3 CKS2 CKS1 CKS0 OCKS1 OCKS0
Speed
(SW2-3) (SW2-4) (SW2-5) (SW2-6) (SW3-5) (SW3-6)
Normal H H L H H L
Double H H L L L L
Quad H H H L H H

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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(4) All interface signals including master clock are fed externally.
PORT3 is used.
(4-1) Slave mode
JP1 : Open
JP2 : Open
SW3-3 (DIF1) : H
SW3-4 (DIF0) : H
In slave mode , the AK4556’s sampling speed and audio interface format is set by SW2. See Table 1 on page 8 for
possible mode setting.
(4-2) Master mode
JP1 : Open
JP2 : Open
SW3-3 (DIF1) : H
SW3-4 (DIF0) : H
In master mode , the AK4556’s sampling speed and audio interface format is set by SW2. See Table 1 on page 8 for
possible mode setting.

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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Setting of DIP SW
1. Evaluation mode setting of SW2 (AK4556)
No. Name Default
1 DEM1 L
2 DEM0 H
3 CKS3 L
4 CKS2 H
5 CKS1 L
6 CKS0 L
Table 1 . SW2 AK4556 Mode Setting
DEM1 DEM0 Mode
L L 44.1kHz
L H OFF
H L 48kHz
H H 32kHz
Table 2 . De-emphasis filter control
Mode CKS3 CKS2 CKS1 CKS0 HPF M/S MCLK Audio I/F
0 L L L L ON Slave
128/192fs (Quad Speed)
256/384fs (Double Speed)
512/768fs (Normal Speed)
LJ/RJ
1 L L L H ON Slave 256/384/512/768fs
(Normal Speed) LJ/RJ
2 L L H L OFF Slave
128/192fs (Quad Speed)
256/384fs (Double Speed)
512/768fs (Normal Speed)
LJ/RJ
3 L L H H OFF Slave 256/384/512/768fs
(Normal Speed) LJ/RJ
4 L H L L ON Slave
128/192fs (Quad Speed)
256/384fs (Double Speed)
512/768fs (Normal Speed)
I2S
5 L H L H ON Slave 256/384/512/768fs
(Normal Speed) I2S
6 L H H L OFF Slave
128/192fs (Quad Speed)
256/384fs (Double Speed)
512/768fs (Normal Speed)
I2S
7 L H H H OFF Slave 256/384/512/768fs
(Normal Speed) I2S
8 H L L L ON Slave
128/192fs (Quad Speed)
256/384fs (Double Speed)
512/768fs (Normal Speed)
LJ
9 H L L H ON Slave 256/384/512/768fs
(Normal Speed) LJ
10 H L H L OFF Slave
128/192fs (Quad Speed)
256/384fs (Double Speed)
512/768fs (Normal Speed)
LJ
11 H L H H OFF Slave 256/384/512/768fs
(Normal Speed) LJ
12 H H L L ON Master 256fs (Double Speed) I2S
13 H H L H ON Master 512fs (Normal Speed) I2S
14 H H H L ON Master 128fs (Quad Speed) I2S
15 H H H H ON Master 256fs (Normal Speed) I2S
Table 3 . AK4556 Mode Settting
In case of the AK4556 evaluation using the AK4114 , LJ/RJ (Mode 0 ~ Mode 3) in Audio I/F does not support.

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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2. Evaluation mode setting of SW3 (AK4114)
No. Name Default
1 XTL1 H
2 XTL0 L
3 DIF1 L
4 DIF0 H
5 OCKS1 L
6 OCKS0 L
7 CM0 H
Table 4 . SW3 AK4114 Mode Setting
XTL1 XTL0 X’tal Frequency
L L 11.2896 MHz
L H 12.288 MHz
H L 24.576 MHz
H H OFF
Table 5 . Reference X’tal Frequency
DIF1 DIF0 DAUX SDTO LRCK,BCLK
L L 24bit LJ 24bit LJ O
L H 24bit I2S 24bit I2S O
H H 24bit I2S 24bit I2S I
Table 6. Audio Data Format
OCKS1 OCKS0 MCKO1 X’tal fs Max Speed
L L 256fs 256fs 96kHz Double
H L 512fs 512fs 48kHz Normal
H H 128fs 128fs 192kHz Quad
Table 7. Master Clock Output Frequency
CM0 PLL Clock Souce SDTO
L ON PLL RX
H OFF X’tal DAUX
Table 8 . Clock Operation Mode
Jumper pins set up
[JP1] : MCLK
Short : MCLK is supplied from the AK4114.
Open :MCLKissuppliedfromPORT3.
[JP2] : SDTI
Short : SDTI is supplied from the AK4114.
Open : SDTI is supplied from PORT3.
[JP3] : RX (DIR)
OPT : Optical connector (PORT1) is used.
BNC : BNC connector (J5) is used.
[JP4] : TX (DIT)
OPT : Optical connector (PORT2) is used.
BNC : BNC connector (J6) is used.

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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Analog input circuit
J1
RIN
+
C7
10u
J2
LIN
+
C8
10u
LIN
RIN
Figure 2. Analog Input Circuit
Analog output circuit
+
C9
22u
R8
220
J3
ROU
T
R9
10k
+
C10
22u
R10
10k
R11
220
J4
LOU
T
LOUT
ROUT
Figure 3. Analog Output Circuit

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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MEASUREMENT RESULTS
[Measurement condition]
●Measurement unit: Audio Precision, System two Cascade
●Slave Mode
●BCLK: 64fs
●Bit: 24bit
●Measurement Frequency: Nomal Speed : 20Hz ∼20kHz , Double & Quad Speed : 20Hz ∼40kHz
●Power Supply: VA=VD=3.3 V
●Temperature: Room
●Input Frequency: 1kHz
●Sampling Frequency: 48kHz , 96kHz , 192kHz
[Measurement Results]
ADC (LIN/RIN) characteristics
Sampling
Frequency Parameter Condition Filter L ch R ch Units
S / (N+D) -1dB Input 20kHzLPF 92.2 92.1 dB
DR -60dB Input 20kHzLPF 102.4 102.4 dB
DR -60dB Input A-weighted 104.8 104.8 dB
48kHz
S/N No Signal A-weighted 104.9 104.9 dB
S / (N+D) -1dB Input 40kHzLPF 90.8 90.8 dB
DR -60dB Input 40kHzLPF 98.7 98.7 dB
DR -60dB Input A-weighted 104.3 104.3 dB
96kHz
S/N No Signal A-weighted 104.4 104.4 dB
S / (N+D) -1dB Input 40kHzLPF 90.8 90.8 dB
DR -60dB Input 40kHz LPF 98.6 98.6 dB
DR -60dB Input A-weighted 103.8 103.8 dB
192kHz
S/N No Signal A-weighted 103.9 103.9 dB
DAC (LOUT/ROUT) characteristics
Sampling
Frequency Parameter Condition Filter L [dB] R [dB] Units
S / (N+D) 0dB Input 20kHzLPF 90.8 90.9 dB
DR -60dB Input 20kHzLPF 105.0 105.0 dB
DR -60dB Input A-weighted 107.5 107.5 dB
48kHz
S/N No Signal A-weighted 107.8 107.8 dB
S / (N+D) 0dB Input 40kHzLPF 89.2 89.1 dB
DR -60dB Input 40kHzLPF 102.7 102.7 dB
DR -60dB Input A-weighted 107.7 107.7 dB
96kHz
S/N No Signal A-weighted 107.7 107.7 dB
S / (N+D) 0dB Input 40kHzLPF 89.2 89.2 dB
DR -60dB Input 40kHz LPF 102.7 102.7 dB
DR -60dB Input A-weighted 107.7 107.7 dB
192kHz
S/N No Signal A-weighted 107.7 107.7 dB

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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[Plots]
ADC
fs=48kHz
AKM AK4556 ADC FFT
fs=48kHz , -1dB Input
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 4. FFT (fin=1kHz , Input Level=-1dBFS)
AKM AK4556 ADC FFT
fs=48kHz , -60dB Input
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 5. FFT (fin=1kHz , Input Level=-60dBFS)

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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AKM AK4556 ADC FFT
fs=48kHz , No Signal
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 6. FFT (fin=1kHz , No Signal)
AKM AK4556 ADC THD + N vs Input Level
fs=48kHz
-120 -10-110 -100 -90 -80 -70 -60 -50 -40 -30 -20
dBr
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
F
S
Figure 7. THD+N vs Input Level (fin=1kHz)

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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AKM AK4556 ADC THD + N vs Input Frequency
fs=48kHz
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
F
S
20 20k50 100 200 500 1k 2k 5k 10k
Hz
Figure 8. THD+N vs Input Frequency (Input Level =-1dBFS)
AKM AK4556 ADC Linearity
fs=48kHz
-120
+0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBr
Figure 9. Linearity (fin=1kHz)

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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AKM AK4556 ADC Freqency Response
fs=48kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-2
+0
-1.8
-1.6
-1.4
-1.2
-1
-0.8
-0.6
-0.4
-0.2
d
B
F
S
Figure 10. Frequency Response
AKM AK4556 ADC Crosstalk
fs=48kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-150
-80
-145
-140
-135
-130
-125
-120
-115
-110
-105
-100
-95
-90
-85
d
B
Figure 11. Crosstalk

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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fs=96kHz
AKM AK4556 ADC FFT
fs=96kHz , -1dB Input
20 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 12. FFT (fin=1kHz , Input Level=-1dBFS)
AKM AK4556 ADC FFT
fs=96kHz , -60dB Input
20 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 13. FFT (fin=1kHz , Input Level=-60dBFS)

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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AKM AK4556 ADC FFT
fs=96kHz , No Signal
20 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 14. FFT (fin=1kHz , No Signal)
AKM AK4556 ADC THD + N vs Input Level
fs=96kHz
-120 -10-110 -100 -90 -80 -70 -60 -50 -40 -30 -20
dBr
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
F
S
Figure 15. THD+N vs Input Level (fin=1kHz)

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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AKM AK4556 ADC THD + N vs Input Frequency
fs=96kHz
20 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
F
S
Figure 16. THD+N vs Input Frequency (Input Level =-1dBFS)
AKM AK4556 ADC Linearity
fs=96kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBr
-120
+0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 17. Linearity (fin=1kHz)

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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AKM AK4556 ADC Freqency Response
fs=96k
20 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
-2
+0
-1.8
-1.6
-1.4
-1.2
-1
-0.8
-0.6
-0.4
-0.2
d
B
F
S
Figure 18. Frequency Response
AKM AK4556 ADC Crosstalk
fs=96kHz
20 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
-150
-80
-145
-140
-135
-130
-125
-120
-115
-110
-105
-100
-95
-90
-85
d
B
Figure 19. Crosstalk

ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
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fs=192kHz
AKM AK4556 ADC FFT
fs=192kHz , -1dB Input
20 80k50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 20. FFT (fin=1kHz , Input Level=-1dBFS)
AKM AK4556 ADC FFT
fs=192kHz , -60dB Input
20 80k50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Figure 21. FFT (fin=1kHz , Input Level=-60dBFS)