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ASAHI KASEI
[AKD4628]
AKD4628
Evaluation board Rev.B for AK4628
GENERAL DESCRIPTION The AKD4628 is an evaluation board for the AK4628, a single chip CODEC that includes two channels of ADC and eight channels of DAC. The AKD4628 also has the digital audio interface and can achieve the interface with digital audio systems via opt-connector or BNC connector. n Ordering guide
AKD4628 --Evaluation board for AK4628 (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 Regulator GND
LIN RIN
Input Buffer
Control Data
10pin Header
LOUT1 ROUT1 LOUT2 ROUT2 Output Buffer
AK4112B(DIR)
BNC In Opt In
AK4628
AK4103(DIT)
Opt Out
AC3 LOUT3
10pin Header
ROUT3 LOUT4 ROUT4
Fig 1. AKD4628 Block Diagram *Circuit diagram and PCB layout are attached at the end of this manual.

-1-
2002/9
ASAHI KASEI
[AKD4628]
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, AK4628 and TVDD of AK4112B. +3.3V is supplied to AVDD and DVDD of AK4112B and TVDD of AK4628. (2) Set up the evaluation mode and jumper pins. (See p.6.) (3) Power on. The AK4628, AK4112B and AK4103 should be reset once bringing PDN(SW1) "L" upon power-up. (4) Set up software. The control mode of AK4628 and AK4112B is fixed to "serial". The AKD4628 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 AKD4628. 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

-2-
2002/9
ASAHI KASEI
[AKD4628]
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 JP4,5,6 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 JP4,5,6 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 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 AKD4628 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 AK4628 and AK4103) 1.DFS_4628(SW2-1) set up of AK4628 Sampling speed(fs). DFS_4628 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 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 MCLK fs 256fs 28k-108kHz Default 512fs 28k-54kz Table 6.Set up of System Clock

-3-
2002/9
ASAHI KASEI
[AKD4628]
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) [JP4,5,6,7] (SDTI1,2,3,4) <4112A> [JP3] (V/TX) ---Analog GND and Digital GND
--- AK4628 SDTI1,2,3,4 input source select : Serial Data is input from DSP via PORT4. : Serial Data is input from AK4112B SDTO. --- 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 n The function of the toggle SW. [SW1] : Resets the AK4628, 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) : 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

-4-
2002/9
ASAHI KASEI
[AKD4628]
n Analog input circuit
3.0Vpp Op-amp circuit
AK4628
22u RIN 32 LIN 31 330 330 4580 + -
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.

-5-
2002/9
ASAHI KASEI
[AKD4628]
n Analog output circuit
3.0Vpp 6.0Vpp 22u NJM4580 + 4.7k 220 Signal 330p
AK4628
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 AK4628.
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.

-6-
2002/9
ASAHI KASEI
[AKD4628]
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 LPF 22u 4580 + 4.7k 220 Signal 3300p 6.0Vpp
AK4628
ROUT1 28 LOUT1 27 ROUT2 26 LOUT2 25 ROUT3 24 LOUT3 23 Same circuit Same circuit
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 AK4628. These filters are effective to attenuate the high frequency noise since some measurement units is sensitive for out-of-band noise.

-7-
2002/9
ASAHI KASEI
[AKD4628]
AK4628 Control Program operation manual
n Set-up of evaluation board and control software
This evaluation board does not correspond to I2C control. 1. Set up the AKD4628 according to above mentioned setting. 2. Connect IBM-AT compatible PC with AKD4628 by 10-line type flat cable (packed with AKD4628). 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 "AKD4628 Control Program ver 1.0" into the CD-ROM-disk drive. 4. Access the CD-ROM-disk drive and double-click the icon of "AKD4628.exe" to set up the control program. 5. Then please evaluate according to the followings. Attention: Please use fixed "CAD1-0=01".
n Operation flow
Keep the following flow. 1. Set up the control program. 2. Click "Port Setup" button. 3. Then set up the dialog and input data.
n Explanation of each buttons
1. [Port Setup] : set up the printer port. 2. [Write default] : initialize the register of AK4628. 3. [Function1] : Dialog to write data by keyboard operation. 4. [Function2] : Dialog to evaluate IPGA and ATTL/ATTR/ATTM. 5. [Write] : write data to each register.

-8-
2002/9
ASAHI KASEI
[AKD4628]
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.
If you want to write the input data to AK4628, click "OK" button. If not, click "Cancel" button. 2. [Function2 Dialog] : Dialog to evaluate IPGA and ATTL/ATTR/ATTM
This dialog corresponds to only addr=05H, 0AH, 0BH and 0CH. 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 AK4628 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 AK4628, 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 AK4628, 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.

-9-
2002/9
ASAHI KASEI
[AKD4628]
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 correspond to I2C control. 1. Set up the AKD4628 according to above mentioned setting. 2. Connect IBM-AT compatible PC with AKD4628 by 10-line type flat cable (packed with AKD4628). 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 "AKD4628 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.

-10-
2002/9
ASAHI KASEI
[AKD4628]
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) : 24bit * Bit : AVDD=DVDD=5V, TVDD=3.3V * Power Supply : DIT(AK4103) * Interface * Temperature : Room 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 95.4dB 99.1dB 101.8dB 99.5dB 102.5dB
Rch 95.3dB 99.3dB 102.2dB 99.4dB 102.5dB
fs=96kHz Parameter S/(N+D) DR S/N
Input signal 1kHz, -0.5dB 1kHz, -60dB no signal
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

-11-
2002/9
ASAHI KASEI
[AKD4628]
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=5V, TVDD=3.3V * Power Supply * Interface : DIR(AK4112B) * Temperature : Room
fs=48kHz Parameter S/(N+D) DR S/N
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
fs=96kHz Parameter S/(N+D) DR S/N
Input signal 1kHz, -0.5dB 1kHz, -60dB no signal
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-
2002/9
ASAHI KASEI
[AKD4628]
1.ADC (ADC fs=48kHz)
AKM AK4628 ADC FFT (fs=48kHz; fin=1kHz, 0dBFS input) FFT points=16384, Avg.8 W indow=Equiripple
+0
-20
-40
-60
d B F S
-80
-100
-120
-140
-160
-180 20
50
100
200
500 Hz
1k
2k
5k
10k
20k
FFT (Input=-0.5dBFS, fin=1kHz)
AKM
AK4628 ADC FFT (fs=48kHz; fin=1kHz,-60dBFS input ) FFT points=16384, Avg.8, W indow=Equiripple
+0
-20
-40
-60
d B F S
-80
-100
-120
-140
-160
-180 20 50 100 200 500 Hz 1k 2k 5k 10k 20k
FFT (Input=-60dBFS, fin=1kHz)

-13-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=48kHz)
AKM AK4628 ADC FFT (fs=48kHz; No signal input) FFT points=16384, Avg.8, W indow=Equripple
+0
-20
-40
-60
d B F S
-80
-100
-120
-140
-160
-180 20 50 100 200 500 Hz 1k 2k 5k 10k 20k
FFT (noise floor)

-14-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=48kHz)
AKM
-70 -75
AK4628 ADC THD+N vs. Input Level (fs=48kHz; fin=1kHz )
-80
-85
-90 d B F S
-95
-100
-105
-110
-115
-120 -140
-130
-120
-110
-100
-90
-80
-70 dBr
-60
-50
-40
-30
-20
-10
+0
THD + N vs Amplitude (fin=1kHz)
AKM
-70 -75
AK4628 ADC THD+N vs. Input Frequency (fs=48kHz;-0.5dBFS input)
-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=-0.5dBFS)

-15-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=48kHz)
AKM
+0 -10 -20 -30 -40 -50 d B F S -60 -70 -80 -90 -100 -110 -120 -130 -140 -140
AK4628 ADC Linearity (fs=48kHz; fin=1kHz)
-130
-120
-110
-100
-90
-80
-70 dBr
-60
-50
-40
-30
-20
-10
+0
Linearity(fin=1kHz)
AKM
+0 -0.1
AK4628 ADC Frequency Response (fs=48kHz; -0.5dBFS input)
-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=-0.5dBFS) (including input RC filter)

-16-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=48kHz)
AKM AK4628 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 Hz
1k
2k
5k
10k
20k
Crosstalk (Upper@1k = Rch, Lower@1k = Lch)

-17-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=96kHz)
AKM AK4628 ADC FFT (fs=96kHz; fin=1kHz, -0.5dBFS Input) FFT points=16384, Avg.8, W indow=Equiripple
+0
-20
-40
-60
d B F S
-80
-100
-120
-140
-160
-180 40
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
FFT(Input=-0.5dBFS, fin=1kHz)
AKM
AK4628 ADC FFT (fs=96kHz; fin=1kHz, -60dBFS input) FFT stpeps=16384, Avg.8, W indow=Equiripple
+0
-20
-40
-60
d B F S
-80
-100
-120
-140
-160
-180 40
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
FFT(Input=-60dBFS, fin=1kHz)

-18-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=96kHz)
AKM AK4628 ADC FFT (fs=96kHz; No signal input) FFT stpeps=16384, Avg.8, W indow=Equiripple
+0
-20
-40
-60
d B F S
-80
-100
-120
-140
-160
-180 40
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
FFT(Noise floor)

-19-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=96kHz)
AKM
-60 -65 -70 -75 -80 -85 d B F S -90 -95 -100 -105 -110 -115 -120 -140
AK4628 ADC THD+N vs. Input Level (fs=96kHz; fin=1kHz)
-130
-120
-110
-100
-90
-80
-70 dBr
-60
-50
-40
-30
-20
-10
+0
THD + N vs Amplitude(fin=1kHz)
AKM
-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
AK4628 ADC THD+N vs. Input Frequency (fs=96kHz; -0.5dBFS input)
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
THD + N vs Input Frequency(Input Level=-0.5dBFS)

-20-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=96kHz)
AKM
+0 -10 -20 -30 -40 -50 d B F S -60 -70 -80 -90 -100 -110 -120 -130 -140 -140
AK4628 ADC Linerity (fs=96kHz; fin=1kHz)
-130
-120
-110
-100
-90
-80
-70 dBr
-60
-50
-40
-30
-20
-10
+0
Linearity(fin=1kHz)
AKM
+0
AK4628 ADC Frequency Response (fs=96kHz; -0.5dBFS input)
-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=-0.5dBFS) (including input RC filter)

-21-
2002/9
ASAHI KASEI
[AKD4628]
(ADC fs=96kHz)
AKM AK4628 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 Hz
2k
5k
10k
20k
40k
Crosstalk (Upper = Rch, Lower = Lch)

-22-
2002/9
ASAHI KASEI
[AKD4628]
2.DAC (DAC fs=48kHz)
AKM AK4628 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 Hz
1k
2k
5k
10k
20k
FFT (Input=0dBFS, fin=1kHz)
AKM
AK4628 DAC FFT (fs=48kHz; fin=1kHz, -60dBFS input) FFT points=16384, Avg.8, W indow=Equiripple
+0
-20
-40
-60 d B r A
-80
-100
-120
-140
-160
-180 20
50
100
200
500 Hz
1k
2k
5k
10k
20k
FFT (Input=-60dBFS, fin=1kHz)

-23-
2002/9
ASAHI KASEI
[AKD4628]
(DAC fs=48kHz)
AKM AK4628 DAC FFT (No data input) FFT points=16384, Avg.8, W indow=Equiripple
+0
-20
-40
-60 d B r A
-80
-100
-120
-140
-160
-180 20
50
100
200
500 Hz
1k
2k
5k
10k
20k
FFT (Noise floor)
AKM
AK4628 DAC FFT (Outband Noise) FFT points=16384, Avg.8, W indow=Equiripple
+0
-20
-40
-60 d B r A
-80
-100
-120
-140
-160
-180 100
200
500
1k
2k Hz
5k
10k
20k
50k
100k
FFT (Outband noise)

-24-
2002/9
ASAHI KASEI
[AKD4628]
(DAC fs=48kHz)
AKM AK4628 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 dBFS
-60
-50
-40
-30
-20
-10
+0
THD + N vs Amplitude(fin=1kHz)
AKM
AK4628 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 Hz
1k
2k
5k
10k
20k
THD + N vs Input Frequency (Input=0dBFS)

-25-
2002/9
ASAHI KASEI
[AKD4628]
(DAC fs=48kHz)
AKM AK4628 DAC Linearity (fs=48kHz, fin=1kHz)
+0 -10 -20 -30 -40 -50 d B r A -60 -70 -80 -90 -100 -110 -120 -130 -140 -140
-130
-120
-110
-100
-90
-80
-70 dBFS
-60
-50
-40
-30
-20
-10
+0
Linearity(fin=1kHz)
AKM
AK4628 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 Hz 12k 14k 16k 18k 20k
Frequency Response(Input Level=0dBFS) (including external RC filter)

-26-
2002/9
ASAHI KASEI
[AKD4628]
(DAC fs=48kHz)
AKM A K 4 6 2 8 D A C C rosstalk (fs=48kHz, 0dBFS Input) Upper@1kHz; Lch--->R c h, 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 Hz
1k
2k
5k
10k
20k
Crosstalk(Upper=Rch, Lower=Lch)

-27-
2002/9
ASAHI KASEI
[AKD4628]
(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 DAC FFT (fs=96kHz; fin=1kHz -0.5dBFS input; Notch; on)
FFT (Input=0dBFS, fin=1kHz, Notch)
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
AK4628 DAC FFT (fs=96kHz; fin=1kHz, -60dBFS input)
200
500
1k Hz
2k
5k
10k
20k
40k
FFT (Input=-60dBFS,fin=1kHz)

-28-
2002/9
ASAHI KASEI
[AKD4628]
(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 DAC FFT (fs=96kHz; No data input)
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 -180 100 200 500
AK4628 DAC FFT (Out of Band Noise )
1k
2k Hz
5k
10k
20k
50k
100k
FFT (Outband noise)

-29-
2002/9
ASAHI KASEI
[AKD4628]
(DAC fs=96kHz)
AKM
-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
AK4628 DAC THD+N vs. Input Level (fs=96kHz; fin=1kHz)
-130
-120
-110
-100
-90
-80
-70 dBFS
-60
-50
-40
-30
-20
-10
+0
THD + N vs Amplitude (fin=1kHz)
AKM
-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 40
AK4628 DAC THD+N vs. Input Frequency (fs=96kHz; -0.5dBFS input)
50
100
200
500
1k Hz
2k
5k
10k
20k
40k
THD + N vs Input Frequency (Input=0dBFS)

-30-
2002/9
ASAHI KASEI
[AKD4628]
(DAC fs=96kHz)
AKM
+0 -10 -20 -30 -40 -50 d B r A -60 -70 -80 -90 -100 -110 -120 -130 -140 -140
AK4628 DAC Linearity (fs=96kHz; fin=1kHz)
-130
-120
-110
-100
-90
-80
-70 dBFS
-60
-50
-40
-30
-20
-10
+0
Linearity(fin=1kHz)
AKM
AK4628 DAC Frequency Response (fs=96kHz; 0dBFS input)
+0.5 +0.4 +0.3 +0.2 +0.1 +0 d B r A -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 Hz 22.5k 25k 27.5k 30k 32.5k 35k 37.5k 40k
Frequency Response(Input Level=0dBFS) (including external RC filter)

-31-
2002/9
ASAHI KASEI
[AKD4628]
(DAC fs=96kHz)
AKM AK4628 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 Hz
2k
5k
10k
20k
40k
Crosstalk (Upper=Rch, Lower=Lch)

-32-
2002/9
ASAHI KASEI
[AKD4628]
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.

-33-
2002/9
5
4
3
2
1
+
R4 R6 1 2 3 4 5 PORT1 10 9 8 7 6 uP-I/F CSN CCLK CDTI CDTO
10k 10k CDTO R2 470 R3 470 R5 470
C3 22u +
R7 330
1
R9 R11 R13
100 DZF1 100 100
C4 0.1u
C5 0.1u
8
L5V
R1
10k
2 3 4 5 6 7 8 9 1 19
D
R1251
G1 G2 74HCT541
-12V
D
44
43
42
41
40
39
38
37
36
35
U3
34
+12V C6 22u + 33 32 31 30 29 28 27 26 25 24 23 ROUT1 LOUT1 ROUT2 2 LOUT2 ROUT3 LOUT3 DZF1 3 1 TR1 RN1202 (10k,10k) R24 1k LE1 DZF2/OVF R15 330 8
4
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
+12V
U2A NJM4580 +3 -2 R8 (open)
J1 RIN
+
R10 330
U2B NJM4580 +5 -6 R16 (open)
TDM0
DZF1
VREFH
DIF0/CSN
LOOP0/SDA/CDTI
DIF1/SCL/CCLK
4112A_MCKO1
R14
100 1 2 3 SDOS I2C SMUTE BICK LRCK SDTI1 SDTI2 SDTI3 SDTO DAUX DFS0
VCOM
AVDD
MCLK
AVSS
P/S
J2 LIN
7
DZF2/OVF RIN1 LIN1 NC TST2
R17 330 -12V
4112A_BICK 4112A_LRCK SDTI1 SDTI2 SDTI3 4529_SDTO
C
R18 R19 R20 R22 R23 R25 R26
100 100 100 100 100 100 100 DFS_4529
4 5 6 7 8 9 10 11
AK4628
ROUT1 LOUT1 ROUT2 LOUT2 ROUT3 ROUT4 LOUT3 LOUT4
4
AVDD2 DZF1
C
SDTI4
SDTI4
DVDD
DVSS
TVDD
CAD1
T1 NJM78M05FA +12V 1 C7 0.1u GND IN OUT 3 + 2 C8 47u 2
12
13
14
15
16
17
18
19
20
21
22
L1 10u
CAD0
DZFE
TST1
PDN
1
L5V
R28 1k ROUT4 LOUT4 DZF2/OVF 3 1 2 TR2 RN1202 (10k,10k)
LE2 AVDD2 DZF2/OVF
+3.3V AVDD1 2 L2 (short) 1 2 L3 1 AVDD2 C10 + 10u C11 0.1u
C9 0.1u +
R29 100 PDN
10u R30 5.1
C12 10u +12V 8 C13 22u + J3 U7B NJM4580 7 -12V R31 220 ROUT4
B
B
8
ROUT1 R35 10k
5+ 64
U4B NJM4580 7 -12V
+
R33 220
+
8
ROUT1 ROUT2
5+ R38 10k 64
U5B NJM4580 7 -12V
R36 220
+
J6 ROUT2 ROUT3
8
C14 22u
+12V J4 C16 22u
+12V
C15 22u
+12V 5+ U6B NJM4580 7 -12V R34 220 J5 ROUT3
ROUT4 R32 10k
5+ 64 R40 4.7K C21 22u +
R37 10k
64
330p C17
330p C18
330p C19 R43 4.7K C22 22u + LOUT1 R50 10k R41 4.7k +12V 8 J8 U4A NJM4580 1 -12V R49 220 LOUT1 LOUT2 3+ 24
330p C20
R39 4.7k +12V 8 J7 U7A NJM4580 1 -12V R47 220 LOUT4 3+
R45 4.7K C23 22u +
R42 4.7k +12V 8 3+ U5A NJM4580 1 -12V R51 220 J9 LOUT2 LOUT3 C24 22u +
R46 4.7K
R44 4.7k +12V 8 3+ U6A NJM4580 1 -12V R53 220 J10 LOUT3 LOUT4
R48 10k
24
R52 10k
24
R54 10k
24
330p C25
A
A
C26 330p
330p C27
330p C28
R56 4.7K
R55 4.7k
R60 4.7K
R57 4.7k
R61 4.7K
R58 4.7k
R62 4.7K
R59 4.7k
Title Size Document Number
AKD4628
AK4628
1
of
Rev
A3
Date:
5 4 3 2
B
3
Thursday,
September 26, 2002Sheet
1
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 1
U8 DVDD CM0/CDTO 28 CDTO
1:1
R64 150
240
2
DVSS
CM1/CDTI
27
CDTI
X1 5p C33 11.2896MHz 2
C
5p
C34 PDN 7 PDN DAUX 22 4529_SDTO 1 8 R BICK 21 4112A_BICK U9A 2 1k R67 4 1k R68 6 1k R70 8 1k V AUTO
B
1
R66 L5V L4 10u 4 3 2 1 OPT 2 C37 0.1u + C38 10u 18k +3.3V 9 C35 + 10u JP2 OPT/COAX 11 COAX C36 0.1u AVDD SDTO 20 4112A_SDTO 3 4112A_LRCK
1
6 5
PORT2 6 GND VCC GND 5 OUT TORX176
R69 470
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
R65
LE3
74HCT14
ERF LE4
U9B
10
AVSS
LRCK
19
74HCT14
FS96 LE5
RX1
ERF
18 5 U9C
12
RX2/DIF0
FS96
17
74HCT14 16 V/TX JP3 15 V/TX 2 3V 1 TX TX 9 U9D
13
RX3/DIF1
P/SN
LE6
14
RX4/DIF2 AK4112A
AUTO
74HCT14
R72 47k
A
Title Size
Document Number
AKD4628
AK4112
2
of
Rev
A3
Date:
3 2
B
3
Thursday, September 26, 2002Sheet
1
5
4
3
2
1
L5V PORT3 5 IN 4 VCC 3 IF 2 6 6 GND 1 TOTX176(ADC) 5
D
L5V R73 1k C42 0.1u L5V 1 2 3 4 5 6 SW2 12 11 10 9 8 7
1S1588
D2
R74 10k 13 U9F 12 11 U9E 10 PDN
D
H
L
74HCT14 C43 0.1u
74HCT14
MDOE U10 V PDN 4112A_MCKO1 4529_SDTO 4112A_BICK 4112A_LRCK 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 AK4103 for NJM5532 x5
C
RP1 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
CKS1
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 2 C61 47u
for NJM5532 x5 L6 1 + + + + + +12V
+ (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 Document Number
AKD4628
Interface
3
of
A3
Date:
5 4 3 2
Thursday, September 26, 2002Sheet
1
+
+
+
+
+
+
1 2 3 4 5
PORT4 10MCKO2 9 GND 8 SDTI1 7 SDTI2 6 SDTI3
R77 100 4112A_MCKO2 C50 47u
+
C
-12V 2 L5 (short) 1 -12V
C60 10u
A
Rev
B
3

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