ASAHI KASEI
[AKD4626]
AKD4626
Evaluation board Rev.B for AK4626
GENERAL DESCRIPTION
The AKD4626 is an evaluation board for the AK4626, a single chip CODEC that includes two channels of
ADC and six channels of DAC. The AKD4626 also has the digital audio interface and can achieve the
interface with digital audio systems via opt-connector or BNC connector.
n Ordering guide
AKD4626
---
Evaluation board for AK4626
(Cable for connecting with printer port of IBM-AT compatible PC
and control software are packed with this.) This control software can’t operate
on Windows NT.
FUNCTION
o On-board analog input buffer circuit
o Compatible with 2 types of interface
- DIT(AK4103)/DIR(AK4112B) with optical output/input and BNC input
- Direct interface with AC3 decoder by 10pin header
o 10pin header for serial control interface
-15V +15V
LIN
Regulator
GND
Input
Buffer
RIN
Control Data
10pin Header
LOUT1
ROUT1
LOUT2
BNC In
AK4112B(DIR)
Output
Buffer
AK4626
Opt In
AK4103(DIT)
Opt Out
ROUT2
AC3
LOUT3
10pin Header
ROUT3
Fig 1. AKD4626 Block Diagram
*Circuit diagram and PCB layout are attached at the end of this manual.
<KM071600>
-1-
2003/4
ASAHI KASEI
[AKD4626]
n Operation sequence
(1) Set up the power supply lines.
[+12V]
(orange jack)
= +12 ∼ +15V
[-12V]
(blue jack)
= -12 ∼ -15V
[AGND] (black jack)
= 0V
[DGND] (black jack)
= 0V
Each supply line should be distributed from the power supply unit.
±12V are supplied to analog interface.
+12V is regulated to +5V and +3.3V by regulators(T1,T2).
+5V is supplied to digital interface, AK4626 and TVDD of AK4112B.
+3.3V is supplied to AVDD and DVDD of AK4112B and TVDD of AK4626.
(2) Set up the evaluation mode and jumper pins. (See p.6.)
(3) Power on.
The AK4626, AK4112B and AK4103 should be reset once bringing PDN(SW1) “L” upon power-up.
(4) Set up software.
The control mode of AK4626 and AK4112B is fixed to “serial”.
10
<KM071600>
-2-
9
CSN
CCLK
The AKD4626 can be controlled via the printer port (parallel port) of IBM-AT
compatible PC. Connect PORT1(uP-I/F) with PC by 10-line flat cable
packed with the AKD4626.
Take care of the direction of connector. There is a mark at pin#1.
The pin layout of PORT1 is as Figure 2.
PORT1
uP-I/F
CDTI
CDTO
2
1
Figure 2. PORT1 pin layout
2003/4
ASAHI KASEI
[AKD4626]
n Evaluation mode
1) Evaluation of ADC
TOTX176 is used for digital output. Clock mode of the AK4112B should be set to PLL mode or X’tal mode.
2) Evaluation of DAC
TORX176 or BNC is used for digital input. Clock mode of the AK4112B should be set to PLL mode. “4112A”
should be selected on JP4,5 and 7.
3) Loopback mode
Clock mode of the AK4112B should be set to PLL mode or X’tal mode. “4112A” should be selected
on JP4,5 and 7.
4) Evaluation of DAC using DSP
“DSP” should be selected on JP4,5 and 7.
Evaluation mode
ADC
AK4112B clock set-up
JP4,5,7
Used I/F
CM1=”0”, CM0=”0”(PLL mode) or
Don’t
TOTX176
CM1=”0”, CM0=”1”(X’tal mode)
care
optical output
DAC
CM1=”0”, CM0=”0”(PLL mode)
“4112A”
Loopback
CM1=”0”, CM0=”1”(X’tal mode)
“4112A”
Using DSP
CM1=”0”, CM0=”0”(PLL mode)
“DSP”
PORT5(10-pin Header)
(Note.)1. Software “4112.exe” packed with the AKD4626 is used for set-up of the AK4112B.
2. CM1 and CM0 bits are D5 and D4 of Addr=00H, respectively
Table 2.Evalution mode
n DIP Switch set up. (See the datasheet of AK4626 and AK4103)
1.DFS_4529(SW2-1) set up of AK4626 Sampling speed(fs).
DFS_4529
OFF
ON
Sampling Speed (fs)
Normal Speed Mode
32kHz~48kHz
Double Speed Mode
64kHz~96kHz
Table 3. Set up of Sampling Speed (fs)
Default
2.V(SW2-2) set up of for AK4103Validity detect.
V
OFF
ON
Validity
Default
Valid
Invalid
Table 4. Set up of Validity
3.FS3(SW2-3) FS2(SW2-4) set up of AK4103 sampling frequency setting.
FS3
OFF
OFF
ON
ON
FS2
Sampling frequency setting
Default
OFF
44.1kHz
ON
48kHz
OFF
Reserved
ON
32kHz
Table 5. Set up of sampling frequency setting
4.CKS0(SW2-5) set up of AK4103 System Clock .
CKS1
OFF
ON
<KM071600>
MCLK
fs
256fs
28k-108kHz Default
512fs
28k-54kz
Table 6.Set up of System Clock
-3-
2003/4
ASAHI KASEI
[AKD4626]
5.DIF0(SW2-6) set up of AK4103 Audio Serial Interface Format.
DIF0
OFF
ON
Audio Serial
LRCK
BICK
Interface Format
24bit, Left justified
H/L
48fs-128fs
24bit, I2S
L/H
48fs-128fs
Table 7. Set up of Audio Serial Interface Format
Default
n Jumper pin set up
[JP1] (GND)
---Analog GND and Digital GND
[JP4,5,7]
(SDTI1,2,3)
<DSP>
<4112A>
--- AK4626 SDTI1,2,3 input source select
: Serial Data is input from DSP via PORT4.
: Serial Data is input from AK4112B SDTO. <default>
[JP3] (V/TX)
<V>
<TX>
--- AK4112B V/TX output select.
: Validity.
: Transmit channel (through data)
<default>
[JP2](OPT/COAX) --- The source of the biphase signal input to the AK4112B
<OPT_IN>
: Optical input to RX1 of AK4112B
<default>
<RX2>
: BNC input to RX1 of AK4112B
n The function of the toggle SW.
[SW1] : Resets the AK4626, AK4112B and AK4103. Keep “H” during normal operation.
n The indication content for LED.
[LE1] (DZF1)
[LE2] (DZF2_OVF)
[LE3] (ERF)
[LE4] (FS96)
[LE5] (AUTO)
[LE6] (V)
<KM071600>
: Zero detection
: Zero detection or Overflow Detection
: AK4112B unlock and parity error output.
: AK4112B 96kHz sampling detect.
: AK4112B AC-3/MPEG detect.
: AK4112B Validity detect
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2003/4
ASAHI KASEI
[AKD4626]
n Analog input circuit
3.0Vpp
Op-amp circuit
AK4626
330
22u
6.0Vpp
+
-
RIN 32
LIN 31
4580
330
Signal
Same circuit
1) Gain
Gain of analog input circuit is
330/(330+330) = -6.02dB.
Therefore input level for this board is
+0.51dBV(=3.0Vpp)+6.02dB
= +6.53dBV = 6.00Vpp = 2.12Vrms.
<KM071600>
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2003/4
ASAHI KASEI
[AKD4626]
n Analog output circuit
3.0Vpp
6.0Vpp
NJM4580
22u
AK4626
ROUT1 28
LOUT1 27
Same circuit
ROUT2 26
Same circuit
LOUT2 25
Same circuit
ROUT3 24
Same circuit
LOUT3 23
Same circuit
220
+
-
10k
4.7k
Signal
330p
4.7k
1st order LPF on this board
1) Frequency response of HPF
The HPF is implemented on board to cancel the DC offset of analog output of AK4626.
Frequency response of 1st-order HPF
| Amplitude |2 = 1/{1+(fc/f)2}; fc=1/2πRC=0.7Hz@R=10k,C=22u
fin
20Hz
Frequency Response
-0.006dB
2) Gain, S/N and frequency response of op-amp circuit
1st-order filter with non-inverting amp is implemented on board to double the analog output level and attenuate out-of-band
noise.
a) Gain
The gain is
1+4.7k/4.7k = +6.02dB.
Therefore the output level of this board is
0.51dBV(=3.0Vpp) + 6.02dB
= 6.53dBV = 6.00Vpp = 2.12Vrms.
<KM071600>
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2003/4
ASAHI KASEI
[AKD4626]
c) Frequency response of filter
Frequency response of the 1st-order filter
| Amplitude |2 = K*{1+(f/fc2)2}/{1+(f/fc1)2};
K = 1+4.7k/4.7k = 2,
fc1 = 1/2πRC = 102.7kHz@R=4.7k,C=330p,
fc2 = K*fc1 = 205.3kHz
Frequency response referenced to output level of this board is as following table:
fin
DC
20kHz
40kHz
80kHz
Frequency Response
0dB
-0.121dB
-0.452dB
-1.448dB
145kHz
-3dB
∞
-6dB
If the frequency response of filter influences the system, 1st-order LPF is also available as the following figure:
3.0Vpp
LPF
ROUT1 28
LOUT1 27
Same circuit
ROUT2 26
Same circuit
LOUT2 25
Same circuit
ROUT3 24
Same circuit
LOUT3 23
Same circuit
6.0Vpp
4580
22u
AK4626
+
-
10k
4.7k
220
Signal
3300p
4.7k
Example of LPF with flat response.
Frequency response of this LPF
| Amplitude |2 = 1/{1+(f/fc)2};
fc = 1/2πRC = 219kHz@R=220,C=3300p
Frequency response referenced to output level of this board is as following table:
fin
DC
20kHz
40kHz
80kHz
Frequency Response
0dB
-0.036dB
-0.142dB
-0.543dB
219kHz
-3dB
∞
-∞dB
The total frequency response of this board is sum of the external filter and internal LPF of AK4626.
These filters are effective to attenuate the high frequency noise since some measurement units is sensitive for out-of-band noise.
<KM071600>
-7-
2003/4
ASAHI KASEI
[AKD4626]
AK4626 Control Program operation manual
n Set-up of evaluation board and control software
This evaluation board does not support I2C control.
1. Set up the AKD4626 according to above mentioned setting.
2. Connect IBM-AT compatible PC with AKD4626 by 10-line type flat cable (packed with AKD4626). Take care of the
direction of 10pin header. (Please install the driver in the CD-ROM-disk 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-disk labeled “AK4626 Evaluation Kit” into the CD-ROM-disk drive.
4. Access the CD-ROM-disk drive and double-click the icon of “akd4626.exe” to set up the control program.
5. Then please evaluate according to the followings.
Attention: Please use fixed “CAD1-0=01”.
n Explanation of each buttons
1. [Write default] : Initialize the register of AK4626.
2. [Function1] :
Dialog to write data by keyboard operation.
3. [Function2] :
Dialog to evaluate IPGA and ATTL/ATTR/ATTM.
4. [Write] :
Write data to each register.
5. [Close]:
Control Program is closed.
<KM071600>
-8-
2003/4
ASAHI KASEI
[AKD4626]
n Explanation of each dialog
1. [Function1 Dialog] :
Address Box:
Data Box:
Dialog to write data by keyboard operation
Input register address in 2 figures of hexadecimal.
Input register data in 2 figures of hexadecimal.
When [Write] button is clicked, the input data is written to AK4626.
When [Close] button is clicked, the Dialog box is closed.
2. [Function2 Dialog] :
Dialog to evaluate IPGA and ATTL/ATTR/ATTM
This dialog supports to only addr=02H~07H.
Address Box: Input register address in 2 figures of hexadecimal.
Start Data Box: Input start data in 2 figures of hexadecimal.
End Data Box: Input end data in 2 figures of hexadecimal.
Interval Box:
Data is written to AK4626 by this interval.
Step Box:
Data changes by this step.
Mode Select Box:
If you check 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
If you do not check 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
If you want to write the input data to AK4626, click “OK” button. If not, click “Cancel” button.
3. [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”.
If you want to write the input data to AK4626, click “OK” button. If not, click “Cancel” button.
n 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.
n Attention on the operation
If you set up Function1 or Function2 dialog, input data to all boxes. Attention dialog is indicated if you input data or
address that is not specified in the datasheet or you click “OK” button before you input data. In that case set up the dialog
and input data once more again. These operations does not need if you click “Cancel” button or check the check box.
<KM071600>
-9-
2003/4
ASAHI KASEI
[AKD4626]
AK4112B Control Program ver 1.0 operation manual
n Set-up of evaluation board and control software
This board is used AK4112B as “DIR”. This software must set up when Evaluation of DAC using DSP and
Clock Mode selected X’tal.(See P3. (4)).
This evaluation board does not support I2C control.
1. Set up the AKD4626 according to above mentioned setting.
2. Connect IBM-AT compatible PC with AKD4626 by 10-line type flat cable (packed with AKD4626). Take care of the
direction of 10pin header. (Please install the driver in the CD-ROM-disk 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-disk labeled “AKD4626 Control Program ver 1.0” into the CD-ROM-disk drive.
4. Access the CD-ROM-disk drive and double-click the icon of “akd4112.exe” to set up the control program.
5. Then please evaluate according to the follows.
n Operation flow
Keep the following flow.
1.
2.
3.
Set up the control program.
Click “Port Setup” button.
Then set up the dialog and input data.
n Explanation of each buttons
1.
2.
3.
4.
5.
[Port Setup] :
set up the printer port.
[Write default] : initialize the register of AK4112.
[All read] : read all registers.
[Read] :
read data from each register.
[Write] :
write data to each register.
If you want to write the input data to AK4112, click “OK” button. If not, click “Cancel” button.
n 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.
<KM071600>
-10-
2003/4
ASAHI KASEI
[AKD4626]
MEASUREMENT RESULTS
1) ADC part
[Measurement condition]
• Measurement unit : Audio Precision, System two, Cascade
: 256fs
• MCLK
: 64fs
• BICK
• fs
: 48kHz, 96kHz
• BW
: 10Hz∼20kHz(fs=48kHz), 10Hz∼48kHz(fs=96kHz)
: 24bit
• Bit
: AVDD=DVDD=5V, TVDD=3.3V
• Power Supply
: DIT(AK4103)
• Interface
• Temperature
: Room
fs=48kHz
Parameter
S/(N+D)
DR
S/N
fs=96kHz
Parameter
S/(N+D)
DR
S/N
<KM071600>
Input signal
1kHz, -0.5dB
1kHz, -60dB
no signal
Input signal
1kHz, -0.5dB
1kHz, -60dB
no signal
Measurement filter
20kLPF
20kLPF
20kLPF+A-weighted
20kLPF
20kLPF+A-weighted
Lch
95.4dB
99.1dB
101.8dB
99.5dB
102.5dB
Rch
95.3dB
99.3dB
102.2dB
99.4dB
102.5dB
Measurement filter
fs/2
fs/2
20kHz+A-weighted
fs/2
20kHz+A-weighted
Lch
93.7dB
97.6dB
104.1dB
97.7dB
104.3dB
Rch
93.7dB
97.6dB
104.1dB
97.7dB
104.4dB
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2003/4
ASAHI KASEI
[AKD4626]
2) DAC part
[Measurement condition]
• Measurement unit : Audio Precision, System two, Cascade(fs=48kHz, 96kHz)
: 256fs
• MCLK
• BICK
: 64fs
• fs
: 48kHz, 96kHz
: 10Hz∼22kHz (fs=48kHz), 10Hz∼40kHz (fs=96kHz)
• BW
: 24bit
• Bit
: AVDD=DVDD=5V, TVDD=3.3V
• Power Supply
• Interface
: DIR(AK4112B)
• Temperature
: Room
fs=48kHz
Parameter
S/(N+D)
DR
S/N
fs=96kHz
Parameter
S/(N+D)
DR
S/N
<KM071600>
Input signal
1kHz, -0.5dB
1kHz, -60dB
no signal
Input signal
1kHz, -0.5dB
1kHz, -60dB
no signal
Measurement filter
20kLPF
20kLPF
22kLPF+A-weighted
20kLPF
22kLPF+A-weighted
Lch
97.7dB
102.6dB
105.7dB
102.5dB
105.9dB
Rch
97.4dB
102.6dB
105.5dB
102.5dB
105.9dB
Measurement filter
40kHzLPF
40kHzLPF
22kHz+A-weighted
40kHz
22kHz+A-weighted
Lch
95.6dB
100.6dB
105.5dB
102.8dB
105.9dB
Rch
95.6dB
100.7dB
105.5dB
102.5dB
105.9dB
-12-
2003/4
ASAHI KASEI
[AKD4626]
1.ADC
(ADC fs=48kHz)
AKM
AK4626 ADC FFT (fs=48kHz; fin=1kHz, 0dBFS input)
FFT points=16384, Avg.8 Window=Equiripple
+0
-20
-40
-60
d
B
F
S
-80
-100
-120
-140
-160
-180
20
50
100
200
500
1k
2k
5k
10k
20k
5k
10k
20k
Hz
FFT (Input=-0.5dBFS, fin=1kHz)
AKM
AK4626 ADC FFT (fs=48kHz; fin=1kHz,-60dBFS input )
FFT points=16384, Avg.8, Window=Equiripple
+0
-20
-40
-60
d
B
F
S
-80
-100
-120
-140
-160
-180
20
50
100
200
500
1k
2k
Hz
FFT (Input=-60dBFS, fin=1kHz)
<KM071600>
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2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=48kHz)
AKM
AK4626 ADC FFT (fs=48kHz; No signal input)
FFT points=16384, Avg.8, Window=Equripple
+0
-20
-40
-60
d
B
F
S
-80
-100
-120
-140
-160
-180
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
FFT (noise floor)
<KM071600>
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2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=48kHz)
AKM
AK4626 ADC THD+N vs. Input Level (fs=48kHz; fin=1kHz )
-70
-75
-80
-85
-90
d
B
F
S
-95
-100
-105
-110
-115
-120
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBr
THD + N vs Amplitude (fin=1kHz)
AKM
AK4626 ADC THD+N vs. Input Frequency (fs=48kHz;-0.5dBFS input)
-70
-75
-80
-85
-90
d
B
F
S
-95
-100
-105
-110
-115
-120
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
THD + N vs Input Frequency (Input=-0.5dBFS)
<KM071600>
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2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=48kHz)
AKM
AK4626 ADC Linearity (fs=48kHz; fin=1kHz)
+0
-10
-20
-30
-40
-50
d
B
F
S
-60
-70
-80
-90
-100
-110
-120
-130
-140
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBr
Linearity(fin=1kHz)
AKM
AK4626 ADC Frequency Response (fs=48kHz; -0.5dBFS input)
+0
-0.1
-0.2
-0.3
-0.4
d
B
F
S
-0.5
-0.6
-0.7
-0.8
-0.9
-1
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
Frequency Response(Input Level=-0.5dBFS)
(including input RC filter)
<KM071600>
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2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=48kHz)
AKM
AK4626 ADC Crosstalk (fs=48kHz; -0.5dBFS input)
Upper@1kHz; Lch--->Rch, Lower@1kHz; Rch--->Lch
-80
-85
-90
-95
-100
-105
-110
d
B
-115
-120
-125
-130
-135
-140
-145
-150
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
Crosstalk (Upper@1k = Rch, Lower@1k = Lch)
<KM071600>
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2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=96kHz)
AKM
AK4626 ADC FFT (fs=96kHz; fin=1kHz, -0.5dBFS Input)
FFT points=16384, Avg.8, Window=Equiripple
+0
-20
-40
-60
d
B
F
S
-80
-100
-120
-140
-160
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
FFT(Input=-0.5dBFS, fin=1kHz)
AKM
AK4626 ADC FFT (fs=96kHz; fin=1kHz, -60dBFS input)
FFT stpeps=16384, Avg.8, Window=Equiripple
+0
-20
-40
-60
d
B
F
S
-80
-100
-120
-140
-160
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
FFT(Input=-60dBFS, fin=1kHz)
<KM071600>
-18-
2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=96kHz)
AKM
AK4626 ADC FFT (fs=96kHz; No signal input)
FFT stpeps=16384, Avg.8, Window=Equiripple
+0
-20
-40
-60
d
B
F
S
-80
-100
-120
-140
-160
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
FFT(Noise floor)
<KM071600>
-19-
2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=96kHz)
AKM
AK4626 ADC THD+N vs. Input Level (fs=96kHz; fin=1kHz)
-60
-65
-70
-75
-80
-85
d
B
F
S
-90
-95
-100
-105
-110
-115
-120
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBr
THD + N vs Amplitude(fin=1kHz)
AKM
AK4626 ADC THD+N vs. Input Frequency (fs=96kHz; -0.5dBFS 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
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
THD + N vs Input Frequency(Input Level=-0.5dBFS)
<KM071600>
-20-
2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=96kHz)
AKM
AK4626 ADC Linerity (fs=96kHz; fin=1kHz)
+0
-10
-20
-30
-40
-50
d
B
F
S
-60
-70
-80
-90
-100
-110
-120
-130
-140
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBr
Linearity(fin=1kHz)
AKM
AK4626 ADC Frequency Response (fs=96kHz; -0.5dBFS input)
+0
-0.1
-0.2
-0.3
-0.4
d
B
F
S
-0.5
-0.6
-0.7
-0.8
-0.9
-1
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
Frequency Response(Input Level=-0.5dBFS)
(including input RC filter)
<KM071600>
-21-
2003/4
ASAHI KASEI
[AKD4626]
(ADC fs=96kHz)
AKM
AK4626 ADC Crosstalk (fs=96kHz; -0.5dBFS input)
Upper@1kHz; Lch--->Rch, Lower@1kHz; Rch--->Lch
-80
-85
-90
-95
-100
-105
-110
d
B
-115
-120
-125
-130
-135
-140
-145
-150
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
Crosstalk (Upper = Rch, Lower = Lch)
<KM071600>
-22-
2003/4
ASAHI KASEI
[AKD4626]
2.DAC
(DAC fs=48kHz)
AKM
AK4626 DAC FFT (fs=48kHz, fin=1kHz, 0dBFS input)
+0
-20
-40
-60
d
B
r
A
-80
-100
-120
-140
-160
-180
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
FFT (Input=0dBFS, fin=1kHz)
AKM
AK4626 DAC FFT (fs=48kHz; fin=1kHz, -60dBFS input)
FFT points=16384, Avg.8, Window=Equiripple
+0
-20
-40
-60
d
B
r
A
-80
-100
-120
-140
-160
-180
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
FFT (Input=-60dBFS, fin=1kHz)
<KM071600>
-23-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=48kHz)
AKM
AK4626 DAC FFT (No data input)
FFT points=16384, Avg.8, Window=Equiripple
+0
-20
-40
-60
d
B
r
A
-80
-100
-120
-140
-160
-180
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
FFT (Noise floor)
AKM
AK4626 DAC FFT (Outband Noise)
FFT points=16384, Avg.8, Window=Equiripple
+0
-20
-40
-60
d
B
r
A
-80
-100
-120
-140
-160
-180
100
200
500
1k
2k
5k
10k
20k
50k
100k
Hz
FFT (Outband noise)
<KM071600>
-24-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=48kHz)
AKM
AK4626 DAC THD+N vs.Input Level (fs=48kHz, fin=1kHz)
-80
-82.5
-85
-87.5
-90
-92.5
-95
d
B
r
A
-97.5
-100
-102.5
-105
-107.5
-110
-112.5
-115
-117.5
-120
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
THD + N vs Amplitude(fin=1kHz)
AKM
AK4626 DAC THD+N vs. fin (fs=48kHz, 0dBFS input)
-80
-82.5
-85
-87.5
-90
-92.5
-95
d
B
r
A
-97.5
-100
-102.5
-105
-107.5
-110
-112.5
-115
-117.5
-120
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
THD + N vs Input Frequency (Input=0dBFS)
<KM071600>
-25-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=48kHz)
AKM
AK4626 DAC Linearity (fs=48kHz, fin=1kHz)
+0
-10
-20
-30
-40
-50
d
B
r
-60
A
-80
-70
-90
-100
-110
-120
-130
-140
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
Linearity(fin=1kHz)
AKM
AK4626 DAC Frequncey Response (fs=48kHz, 0dBFS Input)
+0.5
+0.4
+0.3
+0.2
d
B
r
A
+0.1
+0
-0.1
-0.2
-0.3
-0.4
-0.5
2k
4k
6k
8k
10k
12k
14k
16k
18k
20k
Hz
Frequency Response(Input Level=0dBFS)
(including external RC filter)
<KM071600>
-26-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=48kHz)
AKM
AK4626 DAC Crosstalk (fs=48kHz, 0dBFS Input)
Upper@1kHz; Lch--->Rch, Lower@1kHz; Rch--->Lch
-80
-82.5
-85
-87.5
-90
-92.5
-95
-97.5
d
B
-100
-102.5
-105
-107.5
-110
-112.5
-115
-117.5
-120
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
Crosstalk(Upper=Rch, Lower=Lch)
<KM071600>
-27-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=96kHz)
AKM
AK4626 DAC FFT (fs=96kHz; fin=1kHz -0.5dBFS input; Notch; on)
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
A
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
FFT (Input=0dBFS, fin=1kHz, Notch)
AKM
AK4626 DAC FFT (fs=96kHz; fin=1kHz, -60dBFS input)
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
A
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
FFT (Input=-60dBFS,fin=1kHz)
<KM071600>
-28-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=96kHz)
AKM
AK4626 DAC FFT (fs=96kHz; No data input)
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
A
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
50k
100k
Hz
FFT (Noise floor)
AKM
AK4626 DAC FFT (Out of Band Noise )
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
A
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
100
200
500
1k
2k
5k
10k
20k
Hz
FFT (Outband noise)
<KM071600>
-29-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=96kHz)
AKM
AK4626 DAC THD+N vs. Input Level (fs=96kHz; fin=1kHz)
-80
-82.5
-85
-87.5
-90
-92.5
-95
d
B
r
-97.5
A
-102.5
-100
-105
-107.5
-110
-112.5
-115
-117.5
-120
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
THD + N vs Amplitude (fin=1kHz)
AKM
AK4626 DAC THD+N vs. Input Frequency (fs=96kHz; -0.5dBFS input)
-80
-82.5
-85
-87.5
-90
-92.5
-95
d
B
r
-97.5
A
-102.5
-100
-105
-107.5
-110
-112.5
-115
-117.5
-120
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
THD + N vs Input Frequency (Input=0dBFS)
<KM071600>
-30-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=96kHz)
AKM
AK4626 DAC Linearity (fs=96kHz; fin=1kHz)
+0
-10
-20
-30
-40
-50
d
B
r
-60
A
-80
-70
-90
-100
-110
-120
-130
-140
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
37.5k
40k
dBFS
Linearity(fin=1kHz)
AKM
AK4626 DAC Frequency Response (fs=96kHz; 0dBFS input)
+0.5
+0.4
+0.3
+0.2
+0.1
+0
d
B
r
-0.1
-0.2
-0.3
A
-0.4
-0.5
-0.6
-0.7
-0.8
-0.9
-1
2.5k
5k
7.5k
10k
12.5k
15k
17.5k
20k
22.5k
25k
27.5k
30k
32.5k
35k
Hz
Frequency Response(Input Level=0dBFS)
(including external RC filter)
<KM071600>
-31-
2003/4
ASAHI KASEI
[AKD4626]
(DAC fs=96kHz)
AKM
AK4626 DAC Crosstalk (fs=96kHz; 0dBFS input)
Upper@1kHz; Lch--->Rch, Lower@1kHz; Rch--->Lch
-80
-82.5
-85
-87.5
-90
-92.5
-95
-97.5
d
B
-100
-102.5
-105
-107.5
-110
-112.5
-115
-117.5
-120
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
Crosstalk (Upper=Rch, Lower=Lch)
<KM071600>
-32-
2003/4
ASAHI KASEI
[AKD4626]
IMPORTANT NOTICE
• These products and their specifications are subject to change without notice. Before considering any use or
application, consult the Asahi Kasei Microsystems Co., Ltd. (AKM) sales office or authorized distributor
concerning their current status.
• AKM assumes no liability for infringement of any patent, intellectual property, or other right in the application or
use of any information contained herein.
• Any export of these products, or devices or systems containing them, may require an export license or other
official approval under the law and regulations of the country of export pertaining to customs and tariffs,
currency exchange, or strategic materials.
• AKM products are neither intended nor authorized for use as critical components in any safety, life support, or
other hazard related device or system, and AKM assumes no responsibility relating to any such use, except
with the express written consent of the Representative Director of AKM. As used here:
(a) A hazard related device or system is one designed or intended for life support or maintenance of safety or
for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or
perform may reasonably be expected to result in loss of life or in significant injury or damage to person or
property.
(b) A critical component is one whose failure to function or perform may reasonably be expected to result,
whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it,
and which must therefore meet very high standards of performance and reliability.
• 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 content and conditions, and the
buyer or distributor agrees to assume any and all responsibility and liability for and hold AKM harmless from
any and all claims arising from the use of said product in the absence of such notification.
<KM071600>
-33-
2003/4
10k
CDTO
R2 470
R3 470
R5 470
CSN
CCLK
CDTI
CDTO
1
19
R1251
U1
A1
A2
A3
A4
A5
A6
A7
A8
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
18
17
16
15
14
13
12
11
AVDD1
C1
10u
CSN
CCLK
CDTI
G1
G2
74HCT541
R9
100
R11
100
R13
100
+12V
C2
2.2u
C3
22u
C4
0.1u
C5
0.1u
U2A
J1
RIN
8
R6
2
3
4
5
6
7
8
9
+
10k
1
R7
330
NJM4580
+ 3
1
- 2
R10
330
R8
(open)
4
PORT1
10
9
8
7
6
10k
R4
2
+
D
1
2
3
4
5
R1
3
DZF1
L5V
4
+
5
-12V
D
BICK
4112A_LRCK
R19
100
5
LRCK
SDTI1
R20
100
6
SDTI1
SDTI2
R22
100
7
SDTI3
R23
100
8
4529_SDTO
R25
100
9
10
11
6 -
2
1
ROUT1
R38
10k
4
-12V
R45
4.7K
R57
4.7k
U5B
NJM4580
7
23
LOUT3
DZF1
8
4
LE1
AVDD2
TR1
RN1202
(10k,10k)
DZF1
C
TST4
LE2
AVDD2
TR2
RN1202
(10k,10k)
DZF2/OVF
1
3
PDN
R36
220
+12V
8
C15
22u
ROUT2
5 +
ROUT3
6 -
R37
10k
U6B
NJM4580
7
B
R34
220
J5
ROUT3
-12V
330p C20
R46
4.7K
R44
4.7k
+12V
C23
22u
LOUT2
3
R28
1k
R29
100
3 +
R52
10k
J9
U5A
NJM4580
1
2 -
+12V
C24
22u
LOUT2
3 +
LOUT3
2 -
R54
10k
U6A
NJM4580
1
4
4
-12V
R51
220
8
LOUT1
R24
1k
22
TST3
CAD0
21
20
CAD1
19
TST1
18
PDN
17
16
DVSS
DVDD
15
TVDD
C9
0.1u
C11
0.1u
+
J8
R61
4.7K
R53
220
J10
LOUT3
-12V
A
330p C28
R58
4.7k
R62
4.7K
R59
4.7k
Title
Size
Document Number
AKD4626
A3
Date:
5
R16
(open)
2
LOUT3
-12V
8
R49
220
+
35
34
VCOM
DFS0
330p C27
R60
4.7K
36
ROUT3
R42
4.7k
C26
330p
A
AVDD
24
6 -
+
8
+
2 -
R50
10k
VREFH
LOUT2
ROUT3
J6
4
4
5 +
ROUT2
-12V
U4A
NJM4580
1
37
LOUT2
DAUX
+12V
C16
22u
J4
- 6
C12
10u
8
R33
220
R41
4.7k
3 +
38
SDTO
10u
R30
5.1
+12V
LOUT1
AVSS
ROUT2
25
330p C19
C22
22u
39
26
C10 +
10u
AVDD2
330p C18
R43
4.7K
DZF1
ROUT2
4
1
L3
J2
LIN
+
L2
+
8
+
5 +
R35
10k
40
LOUT1
SDTI3
DZF2/OVF
+12V
ROUT1
MCLK
41
42
ROUT1
27
10u
(short)
U4B
NJM4580
7
P/S
DIF0/CSN
43
28
LOUT1
L5V
7
-12V
SDTI2
+
2
AVDD1
C14
22u
30
29
+3.3V
B
31
NC
U2B
NJM4580
+ 5
R17
330
TST2
14
1
LIN1
DZF2/OVF
R15
330
2
C8
47u
32
ROUT1
TST1
L1
2
+
33
RIN1
AK4626
12
GND
3
DZF2/OVF
2
C7
0.1u
OUT
+12V
C6
22u
1
SMUTE
4
DIF1/SCL/CCLK
3
100
T1
NJM78M05FA
IN
I2C
R18
DFS_4529
1
SDOS
2
4112A_BICK
C
+12V
1
DZFE
4112A_MCKO1
100
13
R14
TDM0
U12
LOOP0/SDA/CDTI
44
uP-I/F
4
3
2
Friday, April 18, 2003
Rev
AK4628
Sheet
1
B
1
of
3
5
4
3
2
1
JP1
GND
D
D
T2
DA02-F
R63
TX
R64
150
1:1
TX
U8
240
+3.3V
C29
10u
C31
10u
+
C30
0.1u
C32
0.1u
+
J11
(TX)
L5V
V/TX
2
X1
5p C33 11.2896MHz
1
DVDD
CM0/CDTO
28
CDTO
2
DVSS
CM1/CDTI
27
CDTI
3
TVDD
OCKS1/CCLK
26
CCLK
4
V/TX
OCKS0/CSN
25
CSN
5
XTI
MCKO1
24
4112A_MCKO1
6
XTO
MCKO2
23
4112A_MCKO2
7
PDN
DAUX
22
4529_SDTO
8
R
BICK
21
4112A_BICK
4112A_SDTO
4112A_LRCK
L5V
1
C
5p
C
C34
PDN
U9A
1
74HCT14
R66
1
18k +3.3V
L5V
L4
10u
5
PORT2
6 GND
VCC
GND
5 OUT
4
3
2
1
OPT
C36
0.1u
C37
0.1u
+ C38
10u
TORX176
R69
COAX
470
J12
COAX
D1
C39
0.1u
1S1588
SDTO
10
AVSS
LRCK
19
ERF
18
FS96
17
P/SN
16
11
RX1
12
RX2/DIF0
13
+3.3V
B
AVDD
20
JP2
OPT/COAX
2
6
C35 +
10u
9
14
RX3/DIF1
RX4/DIF2
AUTO
U9C
5
15
V/TX
2
1k
ERF
R67
LE4
1k
FS96
R68
LE5
1k
AUTO
R70
LE6
1k
V
6
74HCT14
V/TX
JP3
LE3
4
74HCT14
B
3 V
1
TX
R71
75
U9B
3
R65
2
U9D
9
8
74HCT14
TX
AK4112A
R72
47k
T3
A
+
OUT
2
C40
47u
GND
LP2950A
1
+3.3V
IN
3
L5V
C41
A
0.1u
Title
Size
A3
Date:
5
4
3
2
AKD4626
Document Number
Rev
AK4112
Friday, April 18, 2003
Sheet
1
B
2
of
3
5
4
3
2
1
L5V
L5V
PORT3
5
IN 4
VCC 3
IF 2
6 6 GND
1
TOTX176(ADC)
5
D
R73
1
2
3
4
5
6
L5V
1k
C42
0.1u
SW2
12
11
10
9
8
7
RP1
U10
FS2
FS3
V1
U1
TRANS
DIF2
RESETN
DIF1
MCLK
DIF0
SDTI
TXP
BICK
TXN
LRCK
DVSS
FS0/CSN DVDD
FS1/CDTI CKS1
FS2/CCLK CKS0
FS3/CDTO BLS
C1
ANS
L5V
DIF0
C48
0.1u
CKS1
+
V
PDN
4112A_MCKO1
4529_SDTO
4112A_BICK
4112A_LRCK
24
23
22
21
20
19
18
17
16
15
14
13
C49
10u
6
5
4
3
2
1
R74
10k
D
U9F
13
H
MDOE
1
2
3
4
5
6
7
8
9
10
11
12
D2
1S1588
L
12
11
74HCT14
U9E
10
PDN
74HCT14
C43
0.1u
SW1
PDN
DFS_4529
V
FS3
FS2
CKS1
DIF0
47k
L5V
AK4103
for NJM4580 x4
C
C
-12V
R76 100
2
R77 100
4112A_MCKO2
SDTI1
SDTI2
SDTI3
C50
47u
L5
1
-12V
(short)
+
R80 100
PORT4
10MCKO2
9 GND
8 SDTI1
7 SDTI2
6 SDTI3
+
R79 100
4112A_LRCK
1
2
3
4
5
AC3
DSP
C51
0.1u
DSP
+
4112A_BICK
MCKO1
BICK
LRCK
SDTO
C52
10u
C53
0.1u
C54
10u
+
R78 100
C55
0.1u
C56
10u
+
4112A_MCKO1
C57
0.1u
C58
10u
DSP
JP5
SDTI3
for NJM4580 x4
-12V
2
R81 100
C61+
4112A_SDTO
L6
1
+12V
(short)
+
4112A
47u
C62
0.1u
B
+
4112A
C63
10u
C64
0.1u
C65
10u
+
JP4
SDTI2
4112A
C66
0.1u
C67
10u
+
JP7
SDTI1
C68
0.1u
C69
10u
B
for 74HCT14,
74HCT541
L5V
C72
0.1u
C73
0.1u
A
A
Title
Size
Document Number
AKD4626
A3
Date:
5
4
3
2
Friday, April 18, 2003
Rev
Interface
Sheet
1
B
3
of
3