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 a udi o i nterf ace a nd ca n achieve the interface wi th digit al audi o 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
- 2 -
Evaluatio n Bo ard 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
- 3 -
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
- 4 -
(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
- 5 -
(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
- 6 -
(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
- 7 -
(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
- 8 -
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
- 9 -
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 Ope ration Mode
Jumper pins set up
[JP1] : MCLK
Short : MCLK is supplied from the AK4114.
Open : MCLK is supplied from PORT3.
[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
- 10 -
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
- 11 -
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
- 12 -
[Plots]
ADC
fs=48kHz
AKM AK4556 ADC FFT
fs=48kHz , - 1dB Inpu t
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 Inpu t
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
- 13 -
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 Inpu t Lev el
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
- 14 -
AKM AK4556 ADC THD + N vs Inpu t Fr equency
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 Lineari ty
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
- 15 -
AKM AK4556 ADC Fr eqency Respon se
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 C rosstalk
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
- 16 -
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 Inpu t
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
- 17 -
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 Inpu t Lev el
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
- 18 -
AKM AK4556 ADC THD + N vs Inpu t Fr equency
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 Lineari ty
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
- 19 -
AKM AK4556 ADC Fr eqency Respon se
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 C rosstalk
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
- 20 -
fs=192kHz
AKM AK4556 ADC FFT
fs=192kHz , - 1dB Inpu t
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)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 21 -
AKM AK4556 ADC FFT
fs=192kH z , No Si gnal
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 22. FFT (fin=1kHz , No Signal)
AKM AK4556 ADC THD + N vs Inpu t Lev el
fs=192kHz
-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 23. THD+N vs Input Level (fin=1kHz)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 22 -
AKM AK4556 ADC THD + N vs Inpu t Fr equency
fs=192kHz
20 80k50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
F
S
Figure 24. THD+N vs Input Frequency (Input Level =-1dBFS)
AKM AK4556 ADC Lineari ty
fs=192kHz
-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 25. Linearity (fin=1kHz)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 23 -
AKM AK4556 ADC Fr eqency Respon se
fs=192k
20 80k50 100 200 500 1k 2k 5k 10k 20k 50k
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 26. Frequency Response
AKM AK4556 ADC C rosstalk
fs=192kHz
20 80k50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
-150
-80
-145
-140
-135
-130
-125
-120
-115
-110
-105
-100
-95
-90
-85
d
B
Figure 27. Crosstalk
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 24 -
DAC
fs=48kHz
AKM AK4556 DAC FFT
fs=48kHz 0dB Inpu t
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
r
A
Figure 28. FFT (fin=1kHz , Input Level=0dBFS)
AKM AK4556 DAC FFT
fs=48kHz , Notch Fi lt er
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
r
A
Figure 29. FFT (fin=1kHz , Input Level=0dBFS , Notch Filter)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 25 -
AKM AK4556 DAC FFT
fs=48kHz , - 60dB Inpu t
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
r
A
Figure 30. FFT (fin=1kHz , Input Level=-60dBFS)
AKM AK4556 DAC 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
r
A
Figure 31. FFT (fin=1kHz , No Signal)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 26 -
AKM AK4556 DAC THD + N vs Input Lev el
fs=48kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
r
A
Figure 32. THD+N vs Input Level (fin=1kHz)
AKM AK4556 DAC THD + N vs Inpu t Fr equency
fs=48kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
r
A
Figure 33. THD+N vs Input Frequency (Input Level =0dBFS)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 27 -
AKM AK4556 DAC Li nearit y
fs=48kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
-120
+0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
Figure 34. Linearity (fin=1kHz)
AKM AK4556 DAC Frequ ency Respon se
fs=48kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-2
+2
-1.75
-1.5
-1.25
-1
-0.75
-0.5
-0.25
+0
+0.25
+0.5
+0.75
+1
+1.25
+1.5
+1.75
d
B
r
A
Figure 35. Frequency Response
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 28 -
AKM AK4556 DAC Cr ossta lk
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 36. Crosstalk
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 29 -
fs=96kHz
AKM AK4556 DAC FFT
fs=96kHz , 0dB 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
r
A
Figure 37. FFT (fin=1kHz , Input Level=0dBFS)
AKM AK4556 DAC FFT
fs=96kHz , N otch Filter
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
r
A
Figure 38. FFT (fin=1kHz , Input Level=0dBFS , Notch Filter)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 30 -
AKM AK4556 DAC FFT
fs=96kHz , - 60dB Inpu t
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
r
A
Figure 39. FFT (fin=1kHz , Input Level=-60dBFS)
AKM AK4556 DAC 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
r
A
Figure 40. FFT (fin=1kHz , No Signal)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 31 -
AKM AK4556 DAC THD + N vs Input Lev el
fs=96kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
r
A
Figure 41. THD+N vs Input Level (fin=1kHz)
AKM AK4556 DAC THD + N vs Inpu t Fr equency
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
r
A
Figure 42. THD+N vs Input Frequency (Input Level =-1dBFS)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 32 -
AKM AK4556 DAC Li nearit y
fs=96kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
-120
+0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
Figure 43. Linearity (fin=1kHz)
AKM AK4556 DAC Frequ ency Respon se
fs=96kHz
20 40k50 100 200 500 1k 2k 5k 10k 20k
Hz
-2
+2
-1.75
-1.5
-1.25
-1
-0.75
-0.5
-0.25
+0
+0.25
+0.5
+0.75
+1
+1.25
+1.5
+1.75
d
B
r
A
Figure 44. Frequency Response
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 33 -
AKM AK4556 DAC Crosstal k
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 45. Crosstalk
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 34 -
fs=192kHz
AKM AK4556 DAC FFT
fs=192kHz , 0dB 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
r
A
Figure 46. FFT (fin=1kHz , Input Level=0dBFS)
AKM AK4556 DAC FFT
fs=192kHz , Notch Filter
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
r
A
Figure 47. FFT (fin=1kHz , Input Level=0dBFS , Notch Filter)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 35 -
AKM AK4556 DAC 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
r
A
Figure 48. FFT (fin=1kHz , Input Level=-60dBFS)
AKM AK4556 DAC FFT
fs=192kH z , N o Signa l
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
r
A
Figure 49. FFT (fin=1kHz , No Signal)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 36 -
AKM AK4556 DAC THD + N vs Input Lev el
fs=192kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
-120
-60
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
d
B
r
A
Figure 50. THD+N vs Input Level (fin=1kHz)
AKM AK4556 DAC THD + N vs Inpu t Fr equency
fs=192kHz
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
r
A
Figure 51. THD+N vs Input Frequency (Input Level =0dBFS)
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 37 -
AKM AK4556 DAC Li nearit y
fs=192kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBFS
-120
+0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
Figure 52. Linearity (fin=1kHz)
AKM AK4556 DAC Frequ ency Respon se
fs=192kHz
20 80k50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
-2
+2
-1.75
-1.5
-1.25
-1
-0.75
-0.5
-0.25
+0
+0.25
+0.5
+0.75
+1
+1.25
+1.5
+1.75
d
B
r
A
Figure 53. Frequency Response
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 38 -
AKM AK4556 DAC Crosstal k
fs=192kHz
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 54. Crosstalk
ASAHI KASEI [AKD4556-B]
<KM082901> 2006/08
- 39 -
Date
(YY/MM/DD)
Manual
Revision
Board
Revision
Reason Contents
06/05/18 KM082900 0 First Edition
06/08/25 KM082901 1 Change device
revision
• AK4556 Rev.A → Rev.B
• Table Data & Plot Data were updated.
IMPORTANT NOTICE
• These products and their specifications are subject to change without notice. Before considering any
use or applicat ion, consult t he Asahi Kasei Microsys tems Co., Ltd. (AKM) sales off ice or authorized
distri butor concerning t heir current status.
• AKM assumes no liability for infringement of any patent, intellectual propert y, or other right in t he
application or use of any informati on contained herein.
• Any export of these produc ts, or devices or systems containing them, may require an export licens e
or other official approval under the law and regulations of the country of export pertaining to customs
and tariffs, currency exch ange, or strategic materials.
• AKM products are neither i ntended nor authorized for use as critical c omponents in any safety, life
support, or other hazard related device or system, and AKM assumes no responsibility relating to any
such use, exce pt with the express written c onsent of the Represent ative Director of AKM. As used
here:
(a) A hazard related dev ic e or syst em is one desi gned or inte nded f or lif e support o r maint enan ce of
safety or for applications in medicin e, a erospace, nuclear energy, or other fiel ds, in which its
failure to functi on or perform may reaso nably be expect ed to result in loss of life or in signifi cant
injury or damage t o person or prope rty.
(b) A critical component is one whose failure t o function or perform may reas onably be expected to
result, whether d irectly or indirect ly, in the loss of the saf ety or effectiveness of the device or
system contai ning it, and which must t herefore meet very high standards of perf ormance and
reliability.
• It is the responsi bility of the buyer or dist ributor of an AKM product who dis tributes, dispos es of, or
otherwise place s the product with a third party to notify that part y in advance of the above content
and condit ions, and the buyer or distri butor agrees to assume any and all responsib ility and liability
for and hold AKM ha rmless from any and all cl aims arising from the use of s aid product in the
absence of such notific ation.
Revision History
A
A
B
B
C
C
D
D
E
E
E E
D D
C C
B B
A A
VCC
VA
+3.3V
AVDD
VA
DEM0
DEM1
SDTO
CKS0
CKS1
PDN
BCLK
MCLK
LRCK
SDTI
CKS3
CKS2
Title
Size Document Number Rev
Date: Sheet of
AK4556
1
AKD4556-B
A3
12Friday, August 25, 2006
Title
Size Document Number Rev
Date: Sheet of
AK4556
1
AKD4556-B
A3
12Friday, August 25, 2006
Title
Size Document Number Rev
Date: Sheet of
AK4556
1
AKD4556-B
A3
12Friday, August 25, 2006
for 74HC14
DGND AGND
+
C7
10u
+
C7
10u
C14
0.1u
C14
0.1u
RIN
1
LIN
2
VSS
3
VA
4
CKS1
10
CKS0
9
VD
5
DEM0
6
DEM1
7
SDTO
8SDTI 13
LRCK 14
MCLK 15
BCLK 16
PDN 17
VCOM 18
LOUT 19
ROUT 20
CKS2 11
CKS3 12
U1
AK4556
U1
AK4556
GND
1
OUT 2
IN
3
T2LT1117-3.3
T2LT1117-3.3
C4
0.1u
C4
0.1u
R9
10k
R9
10k
+
C5
10u
+
C5
10u
J2
LIN
J2
LIN
GND
1
OUT 2
IN
3
T1LT1117-3.3
T1LT1117-3.3
+
C2
2.2u
+
C2
2.2u
+
C17
47u
+
C17
47u
+
C10
22u
+
C10
22u
+
C15
47u
+
C15
47u
+
C8
10u
+
C8
10u
C11
0.1u
C11
0.1u
+
C9
22u
+
C9
22u
R5 51R5 51
C6
0.1u
C6
0.1u
R3 51R3 51
R10
10k
R10
10k
R2 51R2 51
+C12
47u
+C12
47u
C16
0.1u
C16
0.1u
R8
220
R8
220
J1
RIN
J1
RIN
R1 51R1 51
C1
0.1u
C1
0.1u
R11
220
R11
220
+
C3
10u
+
C3
10u
C13
0.1u
C13
0.1u
J3
ROUT
J3
ROUT
R12 5.1R12 5.1
C18
0.1u
C18
0.1u
R4 51R4 51
J4
LOUT
J4
LOUT
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
DEM1
DEM0
CKS0
+3.3V
PDN
XTI
XTO
OCKS0
OCKS1
CM0
PDN
+3.3V
XTO
+3.3V
XTI
+3.3V
+3.3V
CKS1
CKS2
AVDD
+3.3V
CKS3
DIF0/RX5
OCKS1
OCKS0
CM0
DIF0/RX5
DIF1/RX6
+3.3V
XTL0
XTL1
XTL0
XTL1
+3.3V
MCLK
BCLK
LRCK
SDTI
SDTO
DIF1/RX6
+3.3V
+3.3V
Title
Size Document Number Rev
Date: Sheet of
DIT/DIR
1
AKD4556-B
A3
22
Friday, August 25, 2006
Title
Size Document Number Rev
Date: Sheet of
DIT/DIR
1
AKD4556-B
A3
22
Friday, August 25, 2006
Title
Size Document Number Rev
Date: Sheet of
DIT/DIR
1
AKD4556-B
A3
22
Friday, August 25, 2006
DEM1
DEM0
CKS2
CKS3
HL
OPT
BNC
OCKS1
OCKS0
CM0
DIF0
1:1
TX
RX
OPT
BNC
XTL1
XTL0
VCC
BICK
SDTI
MCLK
LRCK
SDTO
CKS1
CKS0
DIF1
R15
75
R15
75 R25
220k
R25
220k
C28
0.1u
C28
0.1u
R14
18k
R14
18k
13 12
147
U3FU3F
OUT 1
VCC 3
GND 2
PORT1
TORX141
PORT1
TORX141 C19
0.1u
C19
0.1u
R21
5.1
R21
5.1
IPS0/RX4
1AVSS
2DIF0/RX5
3TEST2
4DIF1/RX6
5AVSS
6DIF2/RX7
7IPS1/IIC
8P/SN
9XTL0
10 XTL1
11 VIN
12
TVDD
13 DVSS
14 TX0
15 TX1
16 BOUT
17 COUT
18 UOUT
19 VOUT
20 DVDD
21 DVSS
22 MCKO1
23 LRCK
24
SDTO 25
BICK 26
MCKO2 27
DAUX 28
XTO 29
XTI 30
PDN 31
CM0/CDTO 32
CM1/CDTI 33
OCKS1/CCLK 34
OCKS0/CSN 35
INT0 36
INT1 37
AVDD 38
R39
VCOM 40
AVSS 41
RX0 42
AVSS 43
RX1 44
TEST1 45
RX2 46
AVSS 47
RX3 48
U2
AK4114
U2
AK4114
C27
5p
C27
5p
1
2
3
4
5
6
7
14
13
12
11
10
9
8
SW3
AK4114 Mode Setting
SW3
AK4114 Mode Setting
R24
220k
R24
220k
GND 1
VCC 2
IN 3
PORT2
TOTX141
PORT2
TOTX141
1 2
L1
(short)
L1
(short)
+
C32
10u
+
C32
10u
T4
DA02
T4
DA02
R23
240
R23
240
R16
10k
R16
10k
JP3
RX
JP3
RX
+
C25
10u
+
C25
10u
5 6
147
U3C
74HC14
U3C
74HC14
C31
0.1u
C31
0.1u
1 2
X1
24.576MHz
X1
24.576MHz
+
C29
10u +
C29
10u
+
C24
10u
+
C24
10u
6
5
4
3
2
1
RP1
47k
RP1
47k
JP4
TX
JP4
TX
9 8
147
U3D
74HC14
U3D
74HC14
J6
BNC TX
J6
BNC TX
J5
BNC RX
J5
BNC RX
JP1
MCLK
JP1
MCLK
JP2
SDTI
JP2
SDTI
C33
0.1u
C33
0.1u
+
C23
0.47u
+
C23
0.47u
C265p
C265p
3 4
147
U3B
74HC14
U3B
74HC14
11 10
147
U3E
74HC14
U3E
74HC14
R20
10k
R20
10k
R27
220k
R27
220k
C20
0.1u
C20
0.1u
C22
0.1u
C22
0.1u
R22
150
R22
150
C30
0.1u
C30
0.1u
1 2
147
U3A
74HC14
U3A
74HC14
1
2
3
4
5 6
7
8
9
10
PORT3
DSP
PORT3
DSP
1
2
3
4
5
6
12
11
10
9
8
7
SW2
AK4556 Mode Setting
SW2
AK4556 Mode Setting
R26
220k
R26
220k
7
6
5
4
3
2
1
RP2
47K
RP2
47K
R13
470
R13
470
D1
1S1588
D1
1S1588
SW1
PDN
SW1
PDN
