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[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 Regulator GND
LIN RIN
Input Buffer
Control Data
10pin Header
LOUT1 ROUT1 LOUT2 ROUT2 Output Buffer
AK4112B(DIR)
BNC In Opt In
AK4628A
AK4103A(DIT)
Opt Out
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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[AKD4628A-B]
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". 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.
2 10 PORT1 uP-I/F 9 CSN CCLK CDTI CDTO 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. 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) Evaluation mode ADC
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 MCLK fs 256fs 28k-108kHz Default 512fs 28k-54kz Table 6.Set up of System Clock

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[AKD4628A-B]
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 : Serial Data is input from DSP via PORT4. <4112A> : Serial Data is input from AK4112B SDTO. [JP3] (V/TX) --- AK4112B V/TX output select. : Validity. : Transmit channel (through data)

[JP2](OPT/COAX) --- The source of the biphase signal input to the AK4112B : Optical input to RX1 of AK4112B : 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) : 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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[AKD4628A-B]
Analog input circuit
3.0Vpp Op-amp circuit
AK4628A
22u RIN 32 LIN 31 330 330 OP275GPZ + -
6.0Vpp
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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[AKD4628A-B]
Analog output circuit
3.0Vpp 6.0Vpp 22u OP275GPZ + 4.7k 220 Signal 330p
AK4628A
ROUT1 28 LOUT1 27 ROUT2 26 LOUT2 25 ROUT3 24 LOUT3 23 ROUT4 22 LOUT4 21 Same circuit Same circuit
10k
4.7k Same circuit Same circuit Same circuit Same circuit Same circuit
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=1/2RC=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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[AKD4628A-B]
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 = 1/2RC = 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 6.0Vpp
LPF 22u OP275GPZ + 4.7k 220
AK4628A
ROUT1 28 LOUT1 27 ROUT2 26 LOUT2 25 ROUT3 24 LOUT3 23 Same circuit Same circuit
Signal 3300p
10k
4.7k Same circuit Same circuit Same circuit
ROUT4 22 LOUT4 21
Same circuit Same circuit
Example of LPF with flat response.
Frequency response of this LPF | Amplitude |2 = 1/{1+(f/fc)2}; fc = 1/2RC = 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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[AKD4628A-B]
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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[AKD4628A-B]
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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[AKD4628A-B]
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". (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]. (1) Click [OPEN] Button. (2) Select the file (*.akr) and Click [OPEN] Button.

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[AKD4628A-B]
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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[AKD4628A-B]
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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[AKD4628A-B]
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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[AKD4628A-B]
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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[AKD4628A-B]
MEASUREMENT RESULTS
1) ADC part
[Measurement condition] * Measurement unit : Audio Precision, System two, Cascade : 256fs * MCLK : 64fs * BICK * fs : 48kHz, 96kHz * BW : 10Hz20kHz(fs=48kHz), 10Hz48kHz(fs=96kHz) * Bit : 24bit : AVDD=DVDD= TVDD=5V * Power Supply : DIT(AK4103) * Interface : Room * Temperature fs=48kHz Parameter S/(N+D) DR S/N
Input signal 1kHz, -0.5dB 1kHz, -60dB No signal
Measurement filter 20kLPF 20kLPF 20kLPF+A-weighted 20kLPF 20kLPF+A-weighted
Lch 95.6dB 99.3dB 101.8dB 99.5dB 101.8dB
Rch 95.7dB 99.0dB 101.2dB 99.4dB 101.2dB
fs=96kHz Parameter S/(N+D) DR S/N
Input signal 1kHz, -0.5dB 1kHz, -60dB No signal
Measurement filter fs/2 fs/2 fs/2+A-weighted fs/2 fs/2+A-weighted
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 : 10Hz22kHz (fs=48kHz), 10Hz40kHz (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
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
fs=96kHz Parameter S/(N+D) DR S/N
Input signal 1kHz, 0dB 1kHz, -60dB No signal
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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[AKD4628A-B]
1.ADC (ADC fs=48kHz)
AKM
+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 Hz 1k 2k 5k 10k 20k
AK4628A FFT AVDD=DVDD=5V, fs=48kHz, -0.5dBr input, fin=1kHz
FFT (Input=-0.5dBr, fin=1kHz)
AKM
+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
AK4628A FFT AVDD=DVDD=5V, fs=48kHz, -60dBr input, fin=1kHz
200
500 Hz
1k
2k
5k
10k
20k
FFT (Input=-60dBr, fin=1kHz)

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2007/07
[AKD4628A-B]
(ADC fs=48kHz)
AKM
+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 Hz 1k 2k 5k 10k 20k
AK4628A FFT AVDD=DVDD=5V, fs=48kHz, No signal input, fin=1kHz
FFT (noise floor)

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2007/07
[AKD4628A-B]
(ADC fs=48kHz)
AKM
-70
AK4628A THD+N vs. Input Level AVDD=DVDD=5V, fs=96kHz, fin=1kHz
-75
-80
-85
-90 d B F S
-95
-100
-105
-110
-115
-120 -120
-110
-100
-90
-80
-70
-60 dBr
-50
-40
-30
-20
-10
+0
THD + N vs Amplitude (fin=1kHz)
AKM
-70
AK4628A THD+N vs. Input Frequency AVDD=DVDD=5V, -0.5dBr input, fs=48kHz
-75
-80
-85
-90 d B F S
-95
-100
-105
-110
-115
-120 20
50
100
200
500 Hz
1k
2k
5k
10k
20k
THD + N vs Input Frequency (Input=-0.5dBr)

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[AKD4628A-B]
(ADC fs=48kHz)
AKM
+0 -10 -20 -30 -40 -50 d B F S -60 -70 -80 -90 -100 -110 -120 -120
AK4628A Linearity AVDD=DVDD=5V, fs=48kHz, fin=1kHz
-110
-100
-90
-80
-70
-60 dBr
-50
-40
-30
-20
-10
+0
Linearity(fin=1kHz)
AKM
+0
AK4628A Frequency Response AVDD=DVDD=5V, -0.5dBr input, fs=48kHz
-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 Hz
1k
2k
5k
10k
20k
Frequency Response(Input Level=-0.5dBr) (including input RC filter)

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[AKD4628A-B]
(ADC fs=48kHz)
AKM
-80 -85 -90 -95 -100 -105 -110 d B -115 -120 -125 -130 -135 -140 -145 -150 20
AK4628A Crosstalk DVDD=AVDD=5V, -0.5dBr input, fs=48kHz
50
100
200
500 Hz
1k
2k
5k
10k
20k
Crosstalk (Blue= Rch, Red = Lch)

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[AKD4628A-B]
(ADC fs=96kHz)
AKM
+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 Hz 2k 5k 10k 20k 40k
AK4628A FFT AVDD=DVDD=5V, fs=96kHz, -0.5dBr input, fin=1kHz
FFT(Input=-0.5dBr, fin=1kHz)
AKM
+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
AK4628A FFT AVDD=DVDD=5V, fs=96kHz, -60dBr input, fin=1kHz
500
1k Hz
2k
5k
10k
20k
40k
FFT(Input=-60dBr, fin=1kHz)

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2007/07
[AKD4628A-B]
(ADC fs=96kHz)
AKM
+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 Hz 1k 2k 5k 10k 20k
AK4628A FFT AVDD=DVDD=5V, fs=96kHz, No signal input, fin=1kHz
FFT(Noise floor)

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2007/07
[AKD4628A-B]
(ADC fs=96kHz)
AKM
-70
AK4628A THD+N vs. Input Level AVDD=DVDD=5V, fs=96kHz, fin=1kHz
-75
-80
-85
-90 d B F S
-95
-100
-105
-110
-115
-120 -120
-110
-100
-90
-80
-70
-60 dBr
-50
-40
-30
-20
-10
+0
THD + N vs Amplitude(fin=1kHz)
AKM
-70
AK4628A THD+N vs. Input Frequency AVDD=DVDD=5V, -0.5dBr input, fs=96kHz
-75
-80
-85
-90 d B F S
-95
-100
-105
-110
-115
-120 40
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
THD + N vs Input Frequency(Input Level=-0.5dBr)

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[AKD4628A-B]
(ADC fs=96kHz)
AKM
+0 -10 -20 -30 -40 -50 d B F S -60 -70 -80 -90 -100 -110 -120 -120
AK4628A Linearity AVDD=DVDD=5V, fs=96kHz, fin=1kHz
-110
-100
-90
-80
-70
-60 dBr
-50
-40
-30
-20
-10
+0
Linearity(fin=1kHz)
AKM
+0
AK4628A Frequency Response AVDD=DVDD=5V, -0.5dBr input, fs=96kHz
-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 Hz
2k
5k
10k
20k
40k
Frequency Response(Input Level=-0.5dBr) (including input RC filter)

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2007/07
[AKD4628A-B]
(ADC fs=96kHz)
AKM
-80 -85 -90 -95 -100 -105 -110 d B -115 -120 -125 -130 -135 -140 -145 -150 40
AK4628A Crosstalk DVDD=AVDD=5V, -0.5dBr input, fs=96kHz
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
Crosstalk (Blue= Rch, Red = Lch)

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2007/07
[AKD4628A-B]
2.DAC (DAC fs=48kHz)
AKM
+0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100 200 500 Hz 1k 2k 5k 10k 20k
AK4628A FFT AVDD=DVDD=5V, fs=48kHz, MCLK=512, 0dBFS input, fin=1kHz
FFT (Input=0dBFS, fin=1kHz)
AKM
+0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50
AK4628A FFT AVDD=DVDD=5V, fs=48kHz, MCLK=512, -60dBFS input, fin=1kHz
100
200
500 Hz
1k
2k
5k
10k
20k
FFT (Input=-60dBFS, fin=1kHz)

-27-
2007/07
[AKD4628A-B]
(DAC fs=48kHz)
AKM
+0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100 200 500 Hz 1k 2k 5k 10k 20k
AK4628A FFT AVDD=DVDD=5V, fs=48kHz, fin=No signal
FFT (Noise floor)
AKM
+0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100
AK4628A FFT Out-of-band noise AVDD=DVDD=5V, fs=48kHz, MCLK=512fs, fin=No signal
200
500
1k Hz
2k
5k
10k
20k
50k
100k
FFT (Out-of-band noise)

-28-
2007/07
[AKD4628A-B]
(DAC fs=48kHz)
AKM
-70
AK4628A THD+N vs. Input Level AVDD=DVDD=5V, fs=48kHz, MCLK=512fs, fin=1kHz
-75
-80
-85
-90 d B r A -100
-95
-105
-110
-115
-120 -120
-110
-100
-90
-80
-70
-60 dBFS
-50
-40
-30
-20
-10
+0
THD + N vs Amplitude(fin=1kHz)
AKM
-70
AK4628A THD+N vs. Input Frequency AVDD=DVDD=5V, fs=48kHz, MCLK=512fs, 0dBFS input
-75
-80
-85
-90 d B r A -100
-95
-105
-110
-115
-120 20
50
100
200
500 Hz
1k
2k
5k
10k
20k
THD + N vs Input Frequency (Input=0dBFS)

-29-
2007/07
[AKD4628A-B]
(DAC fs=48kHz)
AKM
+0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -120
AK4628A Linearity AVDD=DVDD=5V, fs=48kHz, MCLK=512fs, fin=1kHz
d B r A
-110
-100
-90
-80
-70
-60 dBFS
-50
-40
-30
-20
-10
+0
Linearity(fin=1kHz)
AKM
+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
AK4628A Frequency Response AVDD=DVDD=5V, fs=48kkHz, MCLK=512fs, 0dBFS input
6k
8k
10k Hz
12k
14k
16k
18k
20k
Frequency Response(Input Level=0dBFS) (including external RC filter)

-30-
2007/07
[AKD4628A-B]
(DAC fs=48kHz)
AKM
-80 -85 -90 -95 -100 -105 d B -110 -115 -120 -125 -130 -135 -140 20
AK4628A Crosstalk (Red=Lch, Blue=Rch) AVDD=DVDD=5V, fs=8kHz, MCLK=512fs, 0dBFS input
50
100
200
500 Hz
1k
2k
5k
10k
20k
Crosstalk(Red=Rch, Blue=Lch)

-31-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
+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 Hz 2k 5k 10k 20k 40k
AK4628 FFT AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input, fin=1kHz
FFT (Input=0dBFS, fin=1kHz)
AKM
+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
AK4628A FFT fs=96kHz, MCLK=256fs, fin=1kHz, 0dBFS input, Notch=ON
200
500
1k Hz
2k
5k
10k
20k
40k
FFT (Input=0dBFS, fin=1kHz, Notch)

-32-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
+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 Hz 2k 5k 10k 20k 40k
AK4628A FFT AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input, fin=1kHz
FFT (Input=-60dBFS,fin=1kHz)
AKM
+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
AK4628A FFT AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, fin=No signal input
200
500
1k Hz
2k
5k
10k
20k
40k
FFT (Noise floor)

-33-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
+0 -10 -20 -30 -40 -50 -60 -70 d B r A -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 20 50 100 200 500 1k Hz 2k 5k 10k 20k 50k 100k
AK4626A FFT Out-of-band noise AVDD=DVDD=5V, fs=44.1kHz, MCLK=512fs, fin=No signal
FFT (Out-of-band noise)

-34-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
-70
AK4626A THD+N vs. Input Level AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, fin=1kHz
-75
-80
-85
-90 d B r A -100
-95
-105
-110
-115
-120 -120
-110
-100
-90
-80
-70
-60 dBFS
-50
-40
-30
-20
-10
+0
THD + N vs Amplitude (fin=1kHz)
AKM
-70
AK4628A THD+N vs. Input Frequency VDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input
-75
-80
-85
-90 d B r A -100
-95
-105
-110
-115
-120 40
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
THD + N vs Input Frequency (Input=0dBFS)

-35-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
+0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -120
AK4628A Linearity AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, fin=1kHz
d B r A
-110
-100
-90
-80
-70
-60 dBFS
-50
-40
-30
-20
-10
+0
Linearity(fin=1kHz)
AKM
+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
AK4628A Frequency Response AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input
10k
12.5k
15k
17.5k
20k Hz
22.5k
25k
27.5k
30k
32.5k
35k
37.5k
40k
Frequency Response(Input Level=0dBFS) (including external RC filter)

-36-
2007/07
[AKD4628A-B]
(DAC fs=96kHz)
AKM
-80 -85 -90 -95 -100 -105 d B -110 -115 -120 -125 -130 -135 -140 40
AK4628A Crosstalk (Red=Lch, Blue=Rch) AVDD=DVDD=5V, fs=96kHz, MCLK=256fs, 0dBFS input
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
Crosstalk (Red=Rch, Blue=Lch)

-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.

-38-
2007/07
5
4
3
2
1
8
L5V
R1 R4 R6
10k 10k 10k CDTO R2 470 R3 470 R5 470
D
1 2 3 4 5
PORT1 10 9 8 7 6 uP-I/F
1 19
R1251
G1 G2 74HCT541
R11 R13
100 100
DZF1
CSN CCLK CDTI CDTO
-12V
D
U3
+12V
4
2 3 4 5 6 7 8 9
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
CSN CCLK CDTI
+
AVDD1 C1 10u
C2 2.2u C3 22u + R7 330
+12V
U2A + OP275GPZ 3
J1 RIN
C4 0.1u R9 100
+
1
C5 0.1u
2
R8 (open)
R10 330
U2B + OP275GPZ 5 J2 LIN
P/S
MCLK
TDM0
DIF1/SCL/CCLK
AVSS
DZF1
DIF0/CSN
LOOP0/SDA/CDTI
VREFH
VCOM
AVDD
4112A_MCKO1
R14
100
C6 22u + DZF2/OVF
R15 330
7
8
SDOS I2C SMUTE
4112A_BICK 4112A_LRCK SDTI1 SDTI2 SDTI3 4529_SDTO
C
DZF2/OVF RIN LIN NC TST2
6
R16 (open)
R17 330 -12V
R18 R19 R20 R22 R23 R25 R26
100 100 100 100 100 100 100 DFS_4529
BICK LRCK SDTI1 SDTI2 SDTI3 SDTO DAUX DFS0 LOUT4 SDTI4 DVDD TVDD DVSS CAD1 CAD0 DZFE TST1 PDN
AK4628A
ROUT1 LOUT1 ROUT2 LOUT2 ROUT3 ROUT4 LOUT3
ROUT1 LOUT1 ROUT2 R24 1k LE1 AVDD2 TR1 RN1202 (10k,10k) DZF1
C
LOUT2 ROUT3 LOUT3
DZF1
3 1
SDTI4
T1 NJM78M05FA +12V
1
C7 0.1u
GND
2
IN
OUT
3
+ C8 47u
2
L1 10u
2
1
L5V ROUT4 LOUT4 +3.3V C9 0.1u C10 + 10u C11 0.1u + DZF2/OVF
R28 1k
LE2 AVDD2 DZF2/OVF
2
3 1
AVDD1
2
L2 (short)
1
2
L3
1
R29 100 PDN
TR2 RN1202 (10k,10k)
AVDD2
10u R30 7.5
C12 10u C13 22u + +12V
8
B
8
ROUT1 R35 10k
5+ 64
U4B R33 OP275GPZ 220 7 -12V
ROUT1 ROUT2
5+
R38 10k
64
U5B R36 OP275GPZ 220 7
8
C14 22u +
+12V J4
8
C16 22u +
+12V J6 ROUT2 ROUT3
C15 22u +
+12V
ROUT4 J5 ROUT3 R32 10k
5+ 64
U7B R31 OP275GPZ 220 7
J3 ROUT4
B
5+
R37 10k
64
U6B R34 OP275GPZ 220 7
-12V 330p C17
330p C18
-12V 330p C19 330p C20
-12V R40 4.7K C21 22u + +12V LOUT4 J10 LOUT3 R48 10k R39 4.7k +12V
R43 4.7K C22 22u + LOUT1 R50 10k
R41 4.7k +12V
8
R45 4.7K J8 LOUT1 LOUT2 C23 22u +
R42 4.7k +12V
R46 4.7K J9 LOUT2 LOUT3 C24 22u +
R44 4.7k
3+ 24
8
3+ 24
U4A R49 OP275GPZ 220 1 -12V
8
U7A R47 OP275GPZ 220 1
J7 LOUT4
3+
R52 10k
24
U5A R51 OP275GPZ 220 1
8
3+
R54 10k
24
U6A R53 OP275GPZ 220 1
-12V 330p C25
A
C26 330p
-12V 330p C27
-12V 330p C28 R56 4.7K R55 4.7k
4
A
R60 4.7K
R57 4.7k
R61 4.7K
R58 4.7k
R62 4.7K
R59 4.7k
Title Size
Document Number
AKD4628A-B
AK4628A
Sheet
1
Rev
A3
Date:
5 4 3 2
1
1
of
Monday, June 11, 2007
3
5
4
3
2
1
JP1 GND
D
D
J11 (TX)
T2 DA02-F
R63
TX
TX +3.3V C29 10u C31 10u L5V + C30 0.1u C32 0.1u
U8
R64 150 1:1
240
1
DVDD
CM0/CDTO
28
CDTO
2
DVSS
CM1/CDTI
27
CDTI
X1 5p C3311.2896MHz
2
1
C
5p
C34 PDN
R66 L5V L4 10u 18k +3.3V
C35 + 10u JP2 OPT/COAX
1
2
6 5
PORT2 6 GND VCC GND 5 OUT
4 3 2 1
OPT C37 0.1u + C38 10u
TORX176
R69 470
COAX
B
+3.3V J12 COAX D1 1S1588 R71 75 C39 0.1u
T3
LP2950A +3.3V
1
C40 47u +
GND
OUT
IN
3
L5V C41 0.1u
A
2
5
4
+ V/TX
3
TVDD
OCKS1/CCLK
26
CCLK
4
V/TX
OCKS0/CSN
25
CSN
5
XTI
MCKO1
24
4112A_MCKO1 L5V
C
6
XTO
MCKO2
23
4112A_MCKO2
7
PDN
DAUX
22
4529_SDTO
8
R
BICK
21
1
4112A_BICK
U9A
R65
LE3
2
1k R67 ERF LE4
74HCT14
9
C36 0.1u
AVDD
SDTO
20
4112A_SDTO
10
AVSS
LRCK
19
3
4112A_LRCK
U9B
4
1k R68 FS96 LE5
74HCT14
11
RX1
ERF
18 5
U9C
12
RX2/DIF0
FS96
17
6
1k R70 AUTO
B
74HCT14
13
RX3/DIF1
P/SN
16
V/TX JP3
14
RX4/DIF2
AK4112B
AUTO
15
V/TX
2
3V 1
TX TX
9
U9D
LE6
8
1k V
74HCT14
R72 47k
A
Title Size
AKD4628A-B
Document Number
A3
Date:
3 2
AK4112B
Sheet
1
Rev
1
2
of
Monday, June 11, 2007
3
5
4
3
2
1
L5V PORT3 5 IN 4 3 VCC 2 IF 6 6 GND 1 TOTX176(ADC) L5V R73 1k C42 0.1u L5V
5
D
1 2 3 4 5 6
SW2
12 11 10 9 8 7
1S1588
D2
R74 10k
D
13
H L
U9F
12
11
U9E
10
PDN
74HCT14 C43 0.1u
74HCT14
MDOE U10 V PDN 4112A_MCKO1 4529_SDTO 4112A_BICK 4112A_LRCK FS2 FS3 RP1
CKS1
AK4103A
C
R76 100 4112A_MCKO1 R78 100 4112A_BICK R79 100 4112A_LRCK R80 100
MCKO1 BICK LRCK SDTO SDTI4
AC3
DSP DSP DSP DSP
SDTI1 SDTI2 SDTI3 SDTI4
C51 0.1u
C52 10u
C53 0.1u
C54 10u
C55 0.1u
C56 10u
C57 0.1u
C58 10u
C59 0.1u
JP6 SDTI4
4112A
JP7 SDTI1
4112A
JP4 SDTI2
4112A
JP5 SDTI3
4112A
+12V
for OP275GPZ x5 L6
2
C61 47u
1
+ + + + +
+ (short)
R81 100 4112A_SDTO
C62 0.1u
B
C63 10u
C64 0.1u
C65 10u
C66 0.1u
C67 10u
C68 0.1u
C69 10u
C70 0.1u
C71 10u
B
for 74HCT14, 74HCT541 L5V
C72 0.1u
C73 0.1u
A
Title Size
AKD4628A-B
Document Number
A3
Date:
5 4 3 2
Monday, June 11, 2007
+ +
+ +
+ +
+ +
+ +
+
1 2 3 4 5
PORT4 10MCKO2 9 GND 8 SDTI1 7 SDTI2 6 SDTI3
R77 100 4112A_MCKO2 C50 47u
+
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 C48 0.1u C49 10u L5V 47k
6 5 4 3 2 1
SW1 PDN
DFS_4529 V FS3 FS2 CKS1 DIF0
C
-12V
for OP275GPZ x5 L5 (short)
2
1
-12V
C60 10u
+12V
A
Interface
Sheet
1
Rev
1
3
of
3

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