[AKD4628A-B]
AKD4628A-B
AK4628A Evaluation Board Rev.1
GENERAL DESCRIPTION
The AKD4628A-B is an evaluation board for the AK4628A, a single chip CODEC that includes two
channels of ADC and eight channels of DAC. The AKD4628A-B also has the digital audio interface and
can achieve the interface with digital audio systems via opt-connector or BNC connector.
Ordering guide
AKD4628A-B
--- AK4628A Evaluation Board
(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
On-board analog input buffer circuit
Compatible with 2 types of interface
- DIT (AK4103A)/DIR (AK4112B) with optical output/input and BNC input
- Direct interface with AC3 decoder by 10pin header
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
AK4628A
Opt In
AK4103A(DIT)
Opt Out
ROUT2
AC3
LOUT3
10pin Header
ROUT3
LOUT4
ROUT4
Fig 1. AKD4628A-B Block Diagram
*Circuit diagram and PCB layout are attached at the end of this manual.
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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, AK4628A and TVDD of AK4112B.
+3.3V is supplied to AVDD and DVDD of AK4112B and TVDD of AK4628A.
(2) Set up the evaluation mode and jumper pins. (See p.6.)
(3) Power on.
The AK4628A, AK4112B and AK4103A should be reset once bringing PDN (SW1) “L” upon power-up.
(4) Set up software.
The control mode of AK4628A and AK4112B is fixed to “serial”.
10
<KM084901>
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9
CSN
CCLK
The AKD4628A-B 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 AKD4628A-B.
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
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[AKD4628A-B]
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. “4112B”
should be selected on JP4, 5, 6 and 7.
3) Loop back mode
Clock mode of the AK4112B should be set to PLL mode or X’tal mode. “4112B” should be selected
on JP4,5,6 and 7.
4) Evaluation of DAC using DSP
“DSP” should be selected on JP4, 5, 6 and 7.
Evaluation mode
ADC
AK4112B clock set-up
JP4, 5, 6, 7 Used I/F
CM1=”0”, CM0=”0”(PLL mode) or
Don’t care TOTX176
CM1=”0”, CM0=”1”(X’tal mode)
optical output
DAC
CM1=”0”, CM0=”0”(PLL mode)
“4112B”
Loop back
CM1=”0”, CM0=”1”(X’tal mode)
“4112B”
Using DSP
CM1=”0”, CM0=”0”(PLL mode)
“DSP”
PORT5 (10-pin Header)
(Note.) 1. Software “akd4628a-b-ak4112b.exe” packed with the AKD4628A-B 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
DIP Switch set up. (See the datasheet of AK4628A and AK4103A)
1.DFS_4628A (SW2-1) set up of AK4628A Sampling speed (fs).
DFS_4628A
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 AK4103A Validity detect.
V
OFF
ON
Validity
Default
Valid
Invalid
Table 4. Set up of Validity
3.FS3 (SW2-3), FS2 (SW2-4) set up of AK4103A 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 AK4103A System Clock.
CKS1
OFF
ON
<KM084901>
MCLK
fs
256fs
28k-108kHz Default
512fs
28k-54kz
Table 6.Set up of System Clock
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5.DIF0 (SW2-6) set up of AK4103A 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
Jumper pin set up
[JP1] (GND)
---Analog GND and Digital GND
[JP4, 5, 6, 7]
(SDTI1, 2, 3, 4) --- AK4628A SDTI1, 2, 3, 4 input source select
<DSP>
: Serial Data is input from DSP via PORT4.
<4112A>
: 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
The function of the toggle SW.
[SW1]: Resets the AK4628A, AK4112B and AK4103A. Keep “H” during normal operation.
The indication content for LED.
[LE1] (DZF1)
[LE2] (DZF2_OVF)
[LE3] (ERF)
[LE4] (FS96)
[LE5] (AUTO)
[LE6] (V)
<KM084901>
: 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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Analog input circuit
3.0Vpp
Op-amp circuit
AK4628A
330
22u
6.0Vpp
+
-
RIN 32
LIN 31
OP275GPZ
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.
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Analog output circuit
3.0Vpp
6.0Vpp
OP275GPZ
22u
AK4628A
ROUT1 28
LOUT1 27
Same circuit
ROUT2 26
Same circuit
LOUT2 25
Same circuit
ROUT3 24
Same circuit
LOUT3 23
Same circuit
ROUT4 22
Same circuit
LOUT4 21
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 AK4628A.
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.
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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
ROUT4 22
Same circuit
LOUT4 21
Same circuit
6.0Vpp
OP275GPZ
22u
AK4628A
+
-
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 AK4628A.
These filters are effective to attenuate the high frequency noise since some measurement units is sensitive for out-of-band noise.
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CONTROL SOFTWARE MANUAL
Set-up of evaluation board and control software
1. Set up the AKD4628A-B according to previous term.
2. Connect IBM-AT compatible PC with AKD4628A-B by 10-line type flat cable (packed with AKD4628A-B). 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 “AKD4628A-B Evaluation Kit” into the CD-ROM drive.
4. Access the CD-ROM drive and double-click the icon of the control files as following to set up the control program.
“akd4628a-b-ak4628a.exe” – AK4628A control program
“akd4628a-b-ak4112b.exe” – AK4112B control program
5. Then please evaluate according to the follows.
(Note) 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 and the control software packed with this do not correspond to I2C control.
Operation flow
Keep the following flow.
1. Set up the control program according to explanation above.
2. Click “Port Reset” button.
3. Click “Write default” button
Explanation of each buttons
1. [Port Reset]:
2. [Write default]:
3. [All Write]:
4. [Function1]:
5. [Function2]:
6. [Function3]:
7. [Function4]:
8. [Function5]:
9. [SAVE]:
10. [OPEN]:
11. [Write]:
Set up the USB interface board (AKDUSBIF-A) when using the board.
Initialize the register of the AK4628A, AK4112B.
Write all registers that are currently displayed.
Dialog to write data by keyboard operation.
Dialog to write data by keyboard operation.
The sequence of register setting can be set and executed.
The sequence that is created on [Function3] can be assigned to buttons and executed.
The register setting that is created by [SAVE] function on main window can be assigned to
buttons and executed.
Save the current register setting.
Write the saved values to all register.
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.
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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”.
If you want to write the input data to the AK4628A, AK4112B, click [OK] button. If not, click [Cancel] button.
2. [Function1 Dialog]: Dialog to write data by keyboard operation
Address Box:
Data Box:
Input registers address in 2 figures of hexadecimal.
Input registers data in 2 figures of hexadecimal.
If you want to write the input data to the AK4628A, AK4112B, click [OK] button. If not, click [Cancel] button.
3. [Function2 Dialog]: Dialog to evaluate DATT
There are dialogs corresponding to register of 03h and 04h.
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 the AK4628A, AK4112B 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 the AK4628A, AK4112B, click [OK] button. If not, click [Cancel] button.
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4. [SAVE] and [OPEN]
4-1. [SAVE]
All of current register setting values displayed on the main window are saved to the file. The extension of file name is
“akr”.
<Operation flow>
(1) Click [SAVE] Button.
(2) Set the file name and click [SAVE] Button. The extension of file name is “akr”.
4-2. [OPEN]
The register setting values saved by [SAVE] are written to the AK4628A, AK4112B. The file type is the same as
[SAVE].
<Operation flow>
(1) Click [OPEN] Button.
(2) Select the file (*.akr) and Click [OPEN] Button.
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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 1. Window of [F3]
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6. [Function4 Dialog]
The sequence file (*.aks) saved by [Function3] can be listed up to 10 files, assigned to buttons and then executed.
When [F4] button is clicked, the window as shown in Figure 2 opens.
Figure 2. [F4] window
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6-1. [OPEN] buttons on left side and [START] buttons
(1) Click [OPEN] button and select the sequence file (*.aks) saved by [Function3].
The sequence file name is displayed as shown in Figure 3. ( In case that the selected sequence file name is
“DAC_Stereo_ON.aks”)
Figure 3. [F4] window(2)
(2) Click [START] button, then the sequence is executed.
6-2. [SAVE] and [OPEN] buttons on right side
[SAVE] : The name assign of sequence file displayed on [Function4] window can be saved to the file. The file name
is “*.ak4”.
[OPEN] : The name assign of sequence file(*.ak4) saved by [SAVE] is loaded.
6-3. Note
(1) This function doesn't support the pause function of sequence function.
(2) All files used by [SAVE] and [OPEN] function on right side need to be in the same folder.
(3) When the sequence is changed in [Function3], the sequence file (*.aks) should be loaded again in order to reflect the
change.
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7. [Function5 Dialog]
The register setting file(*.akr) saved by [SAVE] function on main window can be listed up to 10 files, assigned to
buttons and then executed. When [F5] button is clicked, the window as shown in Figure 4 opens.
Figure 4. [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 name assign of register setting file displayed on [Function5] window can be saved to the file. The file
name is “*.ak5”.
[OPEN] : The name assign of register setting file(*.ak5) saved by [SAVE] is loaded.
7-3. Note
(1) All files used by [SAVE] and [OPEN] function on right side need to be in the same folder.
(2) When the register setting is changed by [SAVE] Button on the main window, the register setting file (*.akr) should be
loaded again in order to reflect the change.
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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)
• Bit
: 24bit
: AVDD=DVDD= TVDD=5V
• Power Supply
: DIT(AK4103)
• Interface
: Room
• Temperature
fs=48kHz
Parameter
S/(N+D)
DR
S/N
fs=96kHz
Parameter
S/(N+D)
DR
S/N
<KM084901>
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
Measurement filter
fs/2
fs/2
fs/2+A-weighted
fs/2
fs/2+A-weighted
-15-
Lch
95.6dB
99.3dB
101.8dB
99.5dB
101.8dB
Rch
95.7dB
99.0dB
101.2dB
99.4dB
101.2dB
Lch
91.7dB
96.3dB
99.0dB
96.3dB
99.1dB
Rch
92.2dB
95.9dB
98.1dB
95.9dB
98.1dB
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[AKD4628A-B]
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= TVDD=5V
• 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
<KM084901>
Input signal
1kHz, 0dB
1kHz, -60dB
No signal
Input signal
1kHz, 0dB
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
40kHz +A-weighted
40kHz
40kHz +A-weighted
Lch
92.7dB
100.3dB
105.7dB
100.7dB
106.1dB
Rch
92.7dB
100.3dB
105.9dB
100.8dB
106.3dB
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1.ADC
(ADC fs=48kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, -0.5dBr input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
F
S
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
5k
10k
20k
5k
10k
20k
Hz
FFT (Input=-0.5dBr, fin=1kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, -60dBr input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
F
S
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
Hz
FFT (Input=-60dBr, fin=1kHz)
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(ADC fs=48kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, No signal input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
F
S
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
FFT (noise floor)
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(ADC fs=48kHz)
AKM
AK4628A THD+N vs. Input Level
AVDD=DVDD=5V, fs=96kHz, fin=1kHz
-70
-75
-80
-85
-90
d
B
F
S
-95
-100
-105
-110
-115
-120
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBr
THD + N vs Amplitude (fin=1kHz)
AKM
AK4628A THD+N vs. Input Frequency
AVDD=DVDD=5V, -0.5dBr input, fs=48kHz
-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=-0.5dBr)
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(ADC fs=48kHz)
AKM
AK4628A Linearity
AVDD=DVDD=5V, fs=48kHz, fin=1kHz
+0
-10
-20
-30
-40
-50
d
B
F
S
-60
-70
-80
-90
-100
-110
-120
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBr
Linearity(fin=1kHz)
AKM
AK4628A Frequency Response
AVDD=DVDD=5V, -0.5dBr input, fs=48kHz
+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=-0.5dBr)
(including input RC filter)
<KM084901>
-20-
2007/07
[AKD4628A-B]
(ADC fs=48kHz)
AKM
AK4628A Crosstalk
DVDD=AVDD=5V, -0.5dBr input, fs=48kHz
-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 (Blue= Rch, Red = Lch)
<KM084901>
-21-
2007/07
[AKD4628A-B]
(ADC fs=96kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=96kHz, -0.5dBr input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
F
S
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
10k
20k
40k
Hz
FFT(Input=-0.5dBr, fin=1kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=96kHz, -60dBr input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
F
S
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
Hz
FFT(Input=-60dBr, fin=1kHz)
<KM084901>
-22-
2007/07
[AKD4628A-B]
(ADC fs=96kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=96kHz, No signal input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
F
S
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
FFT(Noise floor)
<KM084901>
-23-
2007/07
[AKD4628A-B]
(ADC fs=96kHz)
AKM
AK4628A THD+N vs. Input Level
AVDD=DVDD=5V, fs=96kHz, fin=1kHz
-70
-75
-80
-85
-90
d
B
F
S
-95
-100
-105
-110
-115
-120
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBr
THD + N vs Amplitude(fin=1kHz)
AKM
AK4628A THD+N vs. Input Frequency
AVDD=DVDD=5V, -0.5dBr input, fs=96kHz
-70
-75
-80
-85
-90
d
B
F
S
-95
-100
-105
-110
-115
-120
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
THD + N vs Input Frequency(Input Level=-0.5dBr)
<KM084901>
-24-
2007/07
[AKD4628A-B]
(ADC fs=96kHz)
AKM
AK4628A Linearity
AVDD=DVDD=5V, fs=96kHz, fin=1kHz
+0
-10
-20
-30
-40
-50
d
B
F
S
-60
-70
-80
-90
-100
-110
-120
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBr
Linearity(fin=1kHz)
AKM
AK4628A Frequency Response
AVDD=DVDD=5V, -0.5dBr input, fs=96kHz
+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=-0.5dBr)
(including input RC filter)
<KM084901>
-25-
2007/07
[AKD4628A-B]
(ADC fs=96kHz)
AKM
AK4628A Crosstalk
DVDD=AVDD=5V, -0.5dBr input, fs=96kHz
-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 (Blue= Rch, Red = Lch)
<KM084901>
-26-
2007/07
[AKD4628A-B]
2.DAC
(DAC fs=48kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, MCLK=512, 0dBFS input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
5k
10k
20k
10k
20k
Hz
FFT (Input=0dBFS, fin=1kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, MCLK=512, -60dBFS input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
5k
Hz
FFT (Input=-60dBFS, fin=1kHz)
<KM084901>
-27-
2007/07
[AKD4628A-B]
(DAC fs=48kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, fin=No signal
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
FFT (Noise floor)
AKM
AK4628A FFT Out-of-band noise
AVDD=DVDD=5V, fs=48kHz, MCLK=512fs, fin=No signal
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
5k
10k
20k
50k
100k
Hz
FFT (Out-of-band noise)
<KM084901>
-28-
2007/07
[AKD4628A-B]
(DAC fs=48kHz)
AKM
AK4628A THD+N vs. Input Level
AVDD=DVDD=5V, fs=48kHz, MCLK=512fs, fin=1kHz
-70
-75
-80
-85
-90
d
B
r
-95
A
-100
-105
-110
-115
-120
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
THD + N vs Amplitude(fin=1kHz)
AKM
AK4628A THD+N vs. Input Frequency
AVDD=DVDD=5V, fs=48kHz, MCLK=512fs, 0dBFS input
-70
-75
-80
-85
-90
d
B
r
-95
A
-100
-105
-110
-115
-120
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
THD + N vs Input Frequency (Input=0dBFS)
<KM084901>
-29-
2007/07
[AKD4628A-B]
(DAC fs=48kHz)
AKM
AK4628A Linearity
AVDD=DVDD=5V, fs=48kHz, MCLK=512fs, fin=1kHz
+0
-10
-20
-30
-40
d
B
r
A
-50
-60
-70
-80
-90
-100
-110
-120
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
Linearity(fin=1kHz)
AKM
AK4628A Frequency Response
AVDD=DVDD=5V, fs=48kkHz, MCLK=512fs, 0dBFS input
+1
+0.9
+0.8
+0.7
+0.6
+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
-0.6
-0.7
-0.8
-0.9
-1
2k
4k
6k
8k
10k
12k
14k
16k
18k
20k
Hz
Frequency Response(Input Level=0dBFS)
(including external RC filter)
<KM084901>
-30-
2007/07
[AKD4628A-B]
(DAC fs=48kHz)
AKM
AK4628A Crosstalk (Red=Lch, Blue=Rch)
AVDD=DVDD=5V, fs=8kHz, MCLK=512fs, 0dBFS input
-80
-85
-90
-95
-100
-105
d
B
-110
-115
-120
-125
-130
-135
-140
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
Crosstalk(Red=Rch, Blue=Lch)
<KM084901>
-31-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
AK4628 FFT
AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
10k
20k
40k
Hz
FFT (Input=0dBFS, fin=1kHz)
AKM
AK4628A FFT
fs=96kHz, MCLK=256fs, fin=1kHz, 0dBFS input, Notch=ON
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
Hz
FFT (Input=0dBFS, fin=1kHz, Notch)
<KM084901>
-32-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input, fin=1kHz
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
10k
20k
40k
20k
40k
Hz
FFT (Input=-60dBFS,fin=1kHz)
AKM
AK4628A FFT
AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, fin=No signal input
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
40
50
100
200
500
1k
2k
5k
10k
Hz
FFT (Noise floor)
<KM084901>
-33-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
AK4626A FFT Out-of-band noise
AVDD=DVDD=5V, fs=44.1kHz, MCLK=512fs, fin=No signal
+0
-10
-20
-30
-40
-50
-60
-70
d
B
r
-80
A
-100
-90
-110
-120
-130
-140
-150
-160
-170
-180
20
50
100
200
500
1k
2k
5k
10k
20k
50k
100k
Hz
FFT (Out-of-band noise)
<KM084901>
-34-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
AK4626A THD+N vs. Input Level
AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, fin=1kHz
-70
-75
-80
-85
-90
d
B
r
-95
A
-100
-105
-110
-115
-120
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
THD + N vs Amplitude (fin=1kHz)
AKM
AK4628A THD+N vs. Input Frequency
VDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input
-70
-75
-80
-85
-90
d
B
r
-95
A
-100
-105
-110
-115
-120
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
THD + N vs Input Frequency (Input=0dBFS)
<KM084901>
-35-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
AK4628A Linearity
AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, fin=1kHz
+0
-10
-20
-30
-40
d
B
r
A
-50
-60
-70
-80
-90
-100
-110
-120
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
Linearity(fin=1kHz)
AKM
AK4628A Frequency Response
AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input
+1
+0.9
+0.8
+0.7
+0.6
+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
-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
37.5k
40k
Hz
Frequency Response(Input Level=0dBFS)
(including external RC filter)
<KM084901>
-36-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
AK4628A Crosstalk (Red=Lch, Blue=Rch)
AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input
-80
-85
-90
-95
-100
-105
d
B
-110
-115
-120
-125
-130
-135
-140
40
50
100
200
500
1k
2k
5k
10k
20k
40k
Hz
Crosstalk (Red=Rch, Blue=Lch)
<KM084901>
-37-
2007/07
[AKD4628A-B]
Revision History
Date
Manual
Board
Reason
Contents
(YY/MM/DD) Revision
Revision
06/08/29
KM084900
0
First Edition
07/07/03
KM084901
1
Circuit Change U2, U4, U5, U6, U7: OPAmp Change:
NJM4580 OP275GPZ
IMPORTANT NOTICE
These products and their specifications are subject to change without notice.
When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei EMD
Corporation (AKEMD) or authorized distributors as to current status of the products.
AKEMD assumes no liability for infringement of any patent, intellectual property, or other rights 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.
AKEMD products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support, or other hazard
related device or systemNote2), and AKEMD assumes no responsibility for such use, except for the use approved with the express
written consent by Representative Director of AKEMD. As used here:
Note1) 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.
Note2) 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.
It is the responsibility of the buyer or distributor of AKEMD products, who distributes, disposes of, or otherwise places the product
with a third party, to notify such third 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 AKEMD harmless from any and all claims arising from the use of said
product in the absence of such notification.
<KM084901>
-38-
2007/07
R6
10k
CDTO
R2 470
R3 470
R5 470
CSN
CCLK
CDTI
CDTO
1
19
R1251
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
18
17
16
15
14
13
12
11
AVDD1
C1
10u
CSN
CCLK
CDTI
C4
0.1u
G1
G2
74HCT541
R9
100
R11
100
R13
100
+12V
C2
2.2u
C3
22u
C5
0.1u
U2A
8
10k
U1
A1
A2
A3
A4
A5
A6
A7
A8
+
R4
2
3
4
5
6
7
8
9
1
R7
330
1
R10
330
+
OP275GPZ
3
-
2
J1
RIN
R8
(open)
4
PORT1
10
9
8
7
6
10k
2
+
D
1
2
3
4
5
R1
3
DZF1
L5V
4
+
5
-12V
D
uP-I/F
U3
SMUTE
100
LRCK
TST2
R20
100
SDTI1
ROUT1
ROUT1
SDTI2
R22
100
SDTI2
LOUT1
LOUT1
SDTI3
R23
100
SDTI3
ROUT2
ROUT2
4529_SDTO
R25
100
SDTO
LOUT2
LOUT2
SDTI4
R26
100
DAUX
ROUT3
ROUT3
DFS0
LOUT3
LOUT3
+
1
1
(short)
2
1
AVDD2
+
ROUT4
LOUT4
CAD0
CAD1
TST1
PDN
2
1
DZF2/OVF
8
+
6 -
ROUT2
5 +
ROUT3
6 -
R37
10k
U6B
R34
OP275GPZ 220
7
5 +
J5
ROUT3
-12V
4
2 -
-12V
8
3 +
2 -
R54
10k
R57
4.7k
330p C27
R61
4.7K
R58
4.7k
2 -
R48
10k
J10
LOUT3
U7A
R47
OP275GPZ 220
1
-12V
A
R62
4.7K
R56
4.7K
R59
4.7k
R55
4.7k
Title
A3
Date:
4
LOUT4
-12V
Size
5
J7
330p C25
330p C28
R60
4.7K
8
+
U6A
R53
OP275GPZ 220
1
3 +
LOUT4
+12V
C24
22u
LOUT2
LOUT3
-12V
C26
330p
A
J9
+12V
C21
22u
R44
4.7k
R39
4.7k
4
R52
10k
U5A
R51
OP275GPZ 220
1
+
8
3 +
4
2 -
R50
10k
LOUT2
R46
4.7K
+12V
C23
22u
J8
LOUT1
R42
4.7k
R40
4.7K
4
R45
4.7K
+
8
+
LOUT1
B
330p C19
+12V
U4A
R49
OP275GPZ 220
1
ROUT4
330p C17
-12V
R41
4.7k
3 +
J3
-12V
330p C20
C22
22u
6 -
R32
10k
U7B
R31
OP275GPZ 220
7
4
-12V
4
U5B
R36
OP275GPZ 220
7
8
8
5 +
R38
10k
330p C18
R43
4.7K
AVDD2
DZF2/OVF
TR2
RN1202
(10k,10k)
4
ROUT1 ROUT2
LE2
+12V
ROUT4
+12V
C15
22u
J6
4
6 -
R35
10k
+12V
C16
22u
J4
C
C12
10u
+
8
+
5 +
ROUT1
U4B
R33
OP275GPZ 220
7
DZF1
PDN
10u
R30
7.5
+
+12V
C14
22u
AVDD2
TR1
RN1202
(10k,10k)
3
R29
100
C11
0.1u
C13
22u
B
R16
(open)
+
2
AVDD1
DVSS
DVDD
DZFE
C9
0.1u
C10 +
10u
6
J2
LIN
LE1
R28
1k
+3.3V
L3
3
DZF1
ROUT4
LOUT4
L2
R24
1k
L5V
10u
C8
47u
-
2
L1
2
TVDD
AK4628A
SDTI4
3
8
VCOM
AVDD
VREFH
DZF1
AVSS
R19
SDTI1
OUT
OP275GPZ
5
NC
1
C7
0.1u
P/S
4112A_LRCK
GND
IN
MCLK
BICK
2
+12V
+
-12V
100
T1
NJM78M05FA
7
LIN
R18
DFS_4529
U2B
R17
330
RIN
4112A_BICK
C
1
DZF2/OVF
DZF2/OVF
R15
330
4
I2C
DIF0/CSN
SDOS
DIF1/SCL/CCLK
TDM0
100
LOOP0/SDA/CDTI
R14
4112A_MCKO1
+12V
C6
22u
3
2
AKD4628A-B
Document Number
Rev
AK4628A
Monday, June 11, 2007
Sheet
1
1
1
of
3
5
4
3
2
1
JP1
GND
D
D
T2
DA02-F
R63
TX
TX
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
2
U8
240
5
XTI
MCKO1
24
4112A_MCKO1
1
R64
150
6
XTO
MCKO2
23
4112A_MCKO2
7
PDN
DAUX
22
4529_SDTO
8
R
BICK
21
4112A_BICK
SDTO
20
LRCK
19
ERF
18
FS96
17
P/SN
16
+3.3V
C29
10u
1:1
C31
10u
+
C30
0.1u
C32
0.1u
+
J11
(TX)
L5V
V/TX
X1
5p C3311.2896MHz
L5V
C
5p
C
C34
PDN
U9A
1
74HCT14
R66
1
L5V
18k +3.3V
L4
10u
5
PORT2
6 GND
VCC
GND
5 OUT
4
3
2
1
OPT
2
6
C37
0.1u
+ C38
10u
TORX176
R69
9
C35 +
10u
C36
0.1u
JP2
OPT/COAX
11
COAX
12
470
13
+3.3V
B
J12
COAX
D1
C39
0.1u
1S1588
10
14
AVDD
AVSS
RX1
RX2/DIF0
RX3/DIF1
RX4/DIF2
AUTO
4112A_SDTO
4112A_LRCK
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
AK4112B
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
AKD4628A-B
Document Number
Rev
AK4112B
Monday, June 11, 2007
Sheet
1
1
2
of
3
5
4
3
2
1
L5V
L5V
PORT3
5
IN 4
3
VCC 2
IF 1
6 6 GND
TOTX176(ADC)
5
D
R73
1k
1
2
3
4
5
6
L5V
C42
0.1u
SW2
FS2
FS3
1
2
3
4
5
6
7
8
9
10
11
12
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
24
23
22
21
20
19
18
17
16
15
14
13
L5V
DIF0
CKS1
C48
0.1u
+
V
PDN
4112A_MCKO1
4529_SDTO
4112A_BICK
4112A_LRCK
6
5
4
3
2
1
R74
10k
D
U9F
13
H
MDOE
RP1
U10
D2
1S1588
12
11
10
9
8
7
L
12
11
74HCT14
U9E
10
PDN
74HCT14
C43
0.1u
SW1
PDN
DFS_4529
V
FS3
FS2
CKS1
DIF0
47k
C49
10u
L5V
AK4103A
C
C
-12V
for OP275GPZ x5
R76 100
2
R77 100
SDTI1
SDTI2
SDTI3
SDTI4
AC3
DSP
C50
47u
+
4112A_MCKO2
L5
1
-12V
(short)
+
R80 100
PORT4
10MCKO2
9 GND
8 SDTI1
7 SDTI2
6 SDTI3
C51
0.1u
DSP
+
R79 100
4112A_LRCK
1
2
3
4
5
C52
10u
C53
0.1u
+
4112A_BICK
MCKO1
BICK
LRCK
SDTO
SDTI4
C54
10u
C55
0.1u
+
R78 100
C56
10u
C57
0.1u
+
4112A_MCKO1
C58
10u
C59
0.1u
C60
10u
DSP
DSP
JP6
SDTI4
4112A
JP7
SDTI1
JP4
SDTI2
4112A
JP5
SDTI3
+12V
4112A
2
4112A
C61
47u
R81 100
4112A_SDTO
for OP275GPZ x5
L6
1
+12V
+ (short)
+
C62
0.1u
+
C63
10u
C64
0.1u
C65
10u
+
C66
0.1u
C67
10u
+
C68
0.1u
+
C69
10u
C70
0.1u
C71
10u
B
B
for 74HCT14,
74HCT541
L5V
C72
0.1u
C73
0.1u
A
A
Title
Size
AKD4628A-B
Document Number
A3
Date:
5
4
3
2
Monday, June 11, 2007
Rev
Interface
Sheet
1
1
3
of
3