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  3. AK4628AVQ

AKM AK4628AVQ Evaluation Board Manual

  • こんにちは！AKM AKD4628A-BオーディオCODEC評価ボードの説明書について、ご質問にお答えします。この説明書には、ボードの機能、操作手順、ソフトウェアの使い方、測定結果などが詳しく記載されています。どんなことでもお気軽にご質問ください！
  • この評価ボードはどのOSに対応していますか？
    AK4628A-Bのコントロール方法は？
    評価ボードの電源電圧は？
    どのようなインターフェースがありますか？
    付属のソフトウェアは何ですか？
[AKD4628A-B]
<KM084901> 2007/07
- 1 -
AKD4628A-B CODEC AK4628A
BNC
AKD4628A-B --- AK4628A
IBM-AT
Windows NT
-DIT(AK4103A),DIR(AK4112B) BNC
-AC3 10
10
Input
Buffer
LIN
RIN
LOUT1
ROUT1
LOUT2
ROUT2
LOUT3
ROUT3
GND
AK4628A
AK4103A(DIT)
AK4112B(DIR)
10pin Header
10pin Header
Control Data
BNC In
Opt In
Opt Out
A
C3
-15V +15V
Output
Buffer
Regulator
LOUT4
ROUT4
1. AKD4628A-B
*
AK4628A Rev.1
AKD4628A-B
[AKD4628A-B]
<KM084901> 2007/07
- 2 -
PORT1
uP-I/F
1
2
910
CSN
CCLK
CDTI
CDTO
[+12V] ( ) = +12 +15V
[-12V] ( ) = -12 -15V
[AGND] ( ) = 0V
[DGND] ( ) = 0V
12V
+12V (T1,T2) +5V, +3.3V
+5V AK4628A AK4112B TVDD
+3.3V AK4628A TVDD AK4112B AVDD DVDD
AK4628A AK4112B AK4103A SW1 ”L”
AK4628A AK4112B
(POTR1 )
AKD4628A-B
IBM-AT
10 PORT1(uP-I/F)
PC
1 2. PORT1
PORT1 2
[AKD4628A-B]
<KM084901> 2007/07
- 3 -
( 2 )
(1) ADC
TOTX176 AK4112B PLL X’tal
(2) DAC
TORX or BNC AK4112B PLL JP4, 5, 6, 7 4112B
(3) 1
AK4112B PLL X’tal JP4, 5, 6, 7 4112B
(4) DSP
10 PORT4 JP4,5,6,7 DSP
AK4112B
JP4, 5, 6, 7
I/F
ADC CM1=”0”, CM0=”0”(PLL mode) or
CM1=”0”, CM0=”1”(X’tal mode)
Don’t care
TOTX176
DAC CM1=”0”, CM0=”0”(PLL mode) “4112B” TORX176 or BNC
CM1=”0”, CM0=”1”(X’tal mode) “4112B”
DSP
CM1=”0”, CM0=”0”(PLL mode) “DSP” PORT5 (10-pin Header)
( )1.AK4112B ”akd4628a-b-ak4112b.exe”
2.CM1,0 Addr=00H D5,4
2.
DIP SW2 ( AK4628A, AK4103A )
1.DFS_4529(SW2-1) AK4628A
DFS_4529 Sampling Speed (fs)
OFF Normal Speed Mode 32kHz~48kHz
ON Double Speed Mode 64kHz~96kHz
Default
3.
2.V(SW2-2) AK4103A Validity
V Validity
OFF Valid
ON Invalid
Default
4. Validity
3.FS3(SW2-3), FS2(SW2-4) AK4103A
FS3 FS2 Sampling frequency setting
OFF OFF 44.1kHz
OFF ON 48kHz
ON OFF Reserved
ON ON 32kHz
Default
5.
[AKD4628A-B]
<KM084901> 2007/07
- 4 -
4.CKS0(SW2-5) AK4103A
CKS1 MCLK fs
OFF 256fs 28k-108kHz
ON 512fs 28k-54kHz
Default
6.
5.DIF0(SW2-6) AK4103A
DIF0
LRCK BICK
OFF 24bit, Left justified H/L 48fs-128fs
ON 24bit, I
2
S L/H 48fs-128fs
Default
7.
[JP1] (GND)---
[JP4, 5, 6, 7] (SDTI1, 2, 3, 4)--- AK4628A SDTI1,2,3,4
<DSP> : PORT4 DSP
<4112A> : AK4112B SDTO <Default>
[JP3] (V/TX) --- AK4112B V/TX
<V> : Validity <Default>
<TX> :
[JP2] (OPT/COAX) --- BNC AK4112B RX1
<OPT_IN> : AK4112B RX1 <Default>
<RX12> : AK4112B RX1 BNC
[SW1] : AK4628A AK4112B AK4103A “H”
[LE1] (DZF1) :
[LE2] (DZF2_OVF) :
[LE3] (ERF) : AK4112B
[LE4] (FS96) : AK4112B 96kHz
[LE5] (AUTO) : AK4112B AC-3/MPEG
[LE4] (V) : AK4112B
Validity
[AKD4628A-B]
<KM084901> 2007/07
- 5 -
AK4628A
Signal
22u
32 RIN
Same circuit
3.0Vpp
OP275GPZ
-
+
Op-amp circuit
31 LIN
6.0Vpp
330
330
1)
330/(330+330) = -6.02dB
+0.51dBV(=3.0Vpp)+6.02dB
= +6.53dBV = 6.00Vpp = 2.12Vrms
[AKD4628A-B]
<KM084901> 2007/07
- 6 -
A
K4628A
22u
Signal
6.0Vpp
28
27
26
25
ROUT1
Same circuit
3.0Vpp
OP275GPZ
+
-
LOUT1
ROUT2
LOUT2
ROUT3
LOUT3
24
23
Same circuit
Same circuit
Same circuit
Same circuit
10k
4.7k
4.7k
330p
220
ROUT4
LOUT4
22
21
Same circuit
Same circuit
1 LPF
1) HPF F
AK4628A DC HPF
1 HPF F
| |
2
= 1/{1+(fc/f)
2
}; fc=1/2πRC=0.7Hz@R=10k,C=22u
fin 20Hz
Frequency Response
-0.006dB
2) S/N F
AK4628A 2 1
a)
1+4.7k/4.7k = +6.02dB
0.51dBV(=3.0Vpp) + 6.02dB
= 6.53dBV = 6.00Vpp = 2.12Vrms
[AKD4628A-B]
<KM084901> 2007/07
- 7 -
c) F
F
| |
2
= K*{1+(f/fc
2
)
2
}/{1+(f/fc
1
)
2
};
K = 1+4.7k/4.7k = 2,
fc
1
= 1/2πRC = 102.7kHz@R=4.7k,C=330p,
fc
2
= K*fc
1
= 205.3kHz
fin DC 20kHz 40kHz 80kHz 145kHz
∞
Frequency Response 0dB
-0.121dB -0.452dB -1.448dB
-3dB -6dB
F 1 LPF
A
K4628A
22u
Signal
6.0Vpp
28
27
26
25
ROUT1
Same circuit
3.0Vpp
OP275GPZ
+
-
LOUT1
ROUT2
LOUT2
ROUT3
LOUT3
24
23
Same circuit
Same circuit
Same circuit
Same circuit
10k
4.7k
4.7k
3300p
220
LPF
ROUT4
LOUT4
22
21
Same circuit
Same circuit
1 LPF
F
| |
2
= 1/{1+(f/fc)
2
};
fc = 1/2πRC = 219kHz@R=220,C=3300p,
fin DC 20kHz 40kHz 80kHz 219kHz
∞
Frequency Response 0dB
-0.036dB -0.142dB -0.543dB
-3dB
-∞dB
F F AK4628A LPF
[AKD4628A-B]
<KM084901> 2007/07
- 8 -
1. AKD4628A-B
2. IBM-AT AKD4628A-B 10 10
(Windows 2000/XP
AKM
Windows95/98/ME
Windows NT )
3. “AKD4628A-B Evaluation Kit” CD-ROM CD-ROM
4. CD-ROM
“akd4628a-b-ak4628a.exe” --- AK4628A
“akd4628a-b-ak4112b.exe” --- AK4112B
5.
AK4112B DIR DSP 10 PORT4
X’tal (P3. (4) )
1.
2. Port Reset
1. [Port Reset] : USB I/F (AKDUSBIF-A)
2. [Write Default] : AK4628A, AK4112B
3. [All Write] :
4. [Function1] :
5. [Function2] :
6. [Function3] :
7. [Function4] : [Function3]
8. [Function5] : [Save]
9. [Save] :
10. [Open]
11. [Write]:
“H” “1” “L” “0”
[AKD4628A-B]
<KM084901> 2007/07
- 9 -
1. [Write ]:
[Write]
(9 ) “H” “1”
“L” “0”
AK4628A, AK4112B [OK] [Cancel]
2. [Function1 ]:
Address : 16 2
Data : 16 2
AK4628A, AK4112B [OK] [Cancel]
3. [Function2 ]: ATT
03H, 04H
Address : 16 2
Start Data : Start Data 16 2
End Data : End Data 16 2
Interval : Interval AK4628A, AK4112B
Step : Step
Mode Select : 9
: Start Data End Data Start Data
[ ] Start Data = 00, End Data = 09
: 00 01 02 03 04 05 06 07 08 09 09 08 07 06 05 04 03 02 01 00
: Start Data End Data Start Data
[ ] Start Data = 00, End Data = 09
: 00 01 02 03 04 05 06 07 08 09
AK4628A, AK4112B [OK] [Cancel]
[AKD4628A-B]
<KM084901> 2007/07
- 10 -
4. [Save] [Open]
4-1. [Save]
“akr”
(1)[Save]
(2) [Save] “akr”
4-2. [Open]
[Save] AK4628A, AK4112B [Save]
(1) [Open]
(2) ( “akr ”) [Open]
[AKD4628A-B]
<KM084901> 2007/07
- 11 -
5. [Function3 ]
(1) [F3]
(2)
“-1”
(3) [Start]
“-1” [START]
[Function3] Window [Save] [Open]
“aks”
Figure 1. Window of [F3]
[AKD4628A-B]
<KM084901> 2007/07
- 12 -
6. [Function4 ]
[Function3] [F4]
Figure 2 window
Figure 2. [F4] window
[AKD4628A-B]
<KM084901> 2007/07
- 13 -
6-1. [OPEN] [START]
(1) [OPEN] (*.aks)
Figure 3
Figure 3. [F4] window(2)
(2) [START]
6-2. [SAVE] [OPEN]
[SAVE] : “*.ak4”
[OPEN] :
6-3.
(1) [Function4]
(2) [SAVE] [OPEN]
(3)[Function3]
[AKD4628A-B]
<KM084901> 2007/07
- 14 -
7. [Function5 ]
[SAVE]
[F5] Figure 4 Window
Figure 4. [F5] window
7-1. [OPEN] [WRITE]
(1) [OPEN] (*.akr)
(2) [WRITE]
7-2. [SAVE] [OPEN]
[SAVE] : “*.ak5”
[OPEN] : “*.ak5”
7-3.
(1) [SAVE] [OPEN]
(2) [Save]
[AKD4628A-B]
<KM084901> 2007/07
- 15 -
MEASUREMENT RESULTS
1) ADC part
[Measurement condition]
• Measurement unit : Audio Precision, System two, Cascade
• MCLK : 256fs
• BICK : 64fs
• fs : 48kHz, 96kHz
• BW : 10Hz∼20kHz(fs=48kHz), 10Hz∼48kHz(fs=96kHz)
• Bit : 24bit
• Power Supply : AVDD=DVDD= TVDD=5V
• Interface : DIT(AK4103)
• Temperature : Room
fs=48kHz
Parameter Input signal Measurement filter Lch Rch
S/(N+D) 1kHz, -0.5dB 20kLPF 95.6dB 95.7dB
20kLPF 99.3dB 99.0dBDR 1kHz, -60dB
20kLPF+A-weighted 101.8dB 101.2dB
20kLPF 99.5dB 99.4dBS/N No signal
20kLPF+A-weighted 101.8dB 101.2dB
fs=96kHz
Parameter Input signal Measurement filter Lch Rch
S/(N+D) 1kHz, -0.5dB fs/2 91.7dB 92.2dB
fs/2 96.3dB 95.9dBDR 1kHz, -60dB
fs/2+A-weighted 99.0dB 98.1dB
fs/2 96.3dB 95.9dBS/N No signal
fs/2+A-weighted 99.1dB 98.1dB
[AKD4628A-B]
<KM084901> 2007/07
- 16 -
2) DAC part
[Measurement condition]
• Measurement unit : Audio Precision, System two, Cascade(fs=48kHz, 96kHz)
• MCLK : 256fs
• BICK : 64fs
• fs : 48kHz, 96kHz
• BW : 10Hz∼22kHz (fs=48kHz), 10Hz∼40kHz (fs=96kHz)
• Bit : 24bit
• Power Supply : AVDD=DVDD= TVDD=5V
• Interface : DIR(AK4112B)
• Temperature : Room
fs=48kHz
Parameter Input signal Measurement filter Lch Rch
S/(N+D) 1kHz, 0dB 20kLPF 94.9dB 94.3dB
20kLPF 103.2dB 103.2dBDR 1kHz, -60dB
22kLPF+A-weighted 106.1dB 106.3dB
20kLPF 103.2dB 103.4dBS/N No signal
22kLPF+A-weighted 106.1dB 106.3dB
fs=96kHz
Parameter Input signal Measurement filter Lch Rch
S/(N+D) 1kHz, 0dB 40kHzLPF 92.7dB 92.7dB
40kHzLPF 100.3dB 100.3dBDR 1kHz, -60dB
40kHz +A-weighted 105.7dB 105.9dB
40kHz 100.7dB 100.8dBS/N No signal
40kHz +A-weighted 106.1dB 106.3dB
[AKD4628A-B]
<KM084901> 2007/07
- 17 -
1.ADC
(ADC fs=48kHz)
AKM AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, -0.5dBr input, fin=1kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
FFT (Input=-0.5dBr, fin=1kHz)
AKM AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, -60dBr input, fin=1kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
FFT (Input=-60dBr, fin=1kHz)
[AKD4628A-B]
<KM084901> 2007/07
- 18 -
(ADC fs=48kHz)
AKM AK4628A FFT
AVDD=DVDD=5V, fs=48kHz, No signal input, fin=1kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-180
+0
-170
-160
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
FFT (noise floor)
[AKD4628A-B]
<KM084901> 2007/07
- 19 -
(ADC fs=48kHz)
AKM AK4628A THD+N vs. Input Level
AVDD=DVDD=5V, fs=96kHz, fin=1kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBr
-120
-70
-115
-110
-105
-100
-95
-90
-85
-80
-75
d
B
F
S
THD + N vs Amplitude (fin=1kHz)
AKM AK4628A THD+N vs. Input Frequency
AVDD=DVDD=5V, -0.5dBr input, fs=48kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-120
-70
-115
-110
-105
-100
-95
-90
-85
-80
-75
d
B
F
S
THD + N vs Input Frequency (Input=-0.5dBr)
[AKD4628A-B]
<KM084901> 2007/07
- 20 -
(ADC fs=48kHz)
AKM AK4628A Linearity
AVDD=DVDD=5V, fs=48kHz, fin=1kHz
-120 +0-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
dBr
-120
+0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
Linearity(fin=1kHz)
AKM AK4628A Frequency Response
AVDD=DVDD=5V, -0.5dBr input, fs=48kHz
20 20k50 100 200 500 1k 2k 5k 10k
Hz
-1
+0
-0.9
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
d
B
F
S
Frequency Response(Input Level=-0.5dBr)
(including input RC filter)
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