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PDF AK4125-A Data sheet ( Hoja de datos )
| Número de pieza | AK4125-A | |
| Descripción | digital sample rate converter | |
| Fabricantes | Asahi Kasei Microsystems | |
| Logotipo |  |
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ASAHI KASEI
[AKD4125-A]
www.DataSheet4U.com
AKD4125-A
AK4125 Evaluation Board Rev.1
GENERAL DESCRIPTION
The AKD4125-A is an evaluation board for AK4125, the digital sample rate converter. The AKD4125-A
has the digital audio interface and can achieve the interface with digital audio system via opt-connector.
Ordering guide
AKD4125-A --- AK4125 Evaluation Board
FUNCTION
• DIR/DIT with optical input/output
• 10pin Header for AKM AD/DA evaluation board
Opt In
AK4114
5V GND
Regulator
AK4114
Opt Out
COAX
COAX
10pin
Header
DSP
Data
AK4125
10pin
Header
Figure 1. AKD4125-A Block Diagram
* Circuit diagram and PCB layout are attached at the end of this manual.
DSP
Data
<KM078701>
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2006/04
1 page  
ASAHI KASEI
[AKD4125-A]
www.DataSheet4U.com
(2) All clocks are fed through the 10pin port
When using PORT3 (OUTPUT), nothing should be connected to J2 (TX) and PORT4 (DIT).
JP6 JP7
OBICK OLRCK
• SW4 setting (See Table 6)
Upper-side is “H” and lower-side is “L”.
SW4 No.
1
2
3
4
5
6
7
Name
ODIF1
ODIF0
CMODE2
CMODE1
CMODE0
OBIT1
OBIT0
ON (“H”)
OFF (“L”)
AK4125 Output Audio I/F Format Setting
Refer to Table 7
AK4125 Mode Setting
Refer to Table 8
AK4125 Output bit Length Setting
Refer to Table 9
Table 6. SW4 Setting
Default
H
L
H
L
L
H
H
Mode ODIF1 ODIF0 SDTO Format
0L
L LSB justified
1L
H (Reserved)
2H
3H
L MSB justified
H I2S Compatible
Table 7. Output Audio Interface Format 1 (Output PORT)
Mode
0
1
2
3
4
5
6
7
CMODE2
L
L
L
L
H
H
H
H
CMODE1 CMODE0 Master / Slave
OMCLK
LL
Master
256fso
LH
Master
384fso
HL
Master
512fso
HH
Master
768fso
LL
Slave
Not used. Set to DVSS.
LH
Master
128fso
HL
Master
192fso
H H Master (Bypass) Not used. Set to DVSS.
Table 8. Master/Slave Control (Output PORT)
fso
8k ∼ 108kHz
8k ∼ 108kHz
8k ∼ 54kHz
8k ∼ 54kHz
8k ∼ 216kHz
8k ∼ 216kHz
8k ∼ 216kHz
8k ∼ 216kHz
Mode
OBIT1
OBIT0 SDTO Output
0L L
16bit
1LH
18bit
2H L
20bit
3HH
24bit
Table 9. Output Audio Interface Format 2 (Output PORT)
<KM078701>
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2006/04
5 Page 
ASAHI KASEI
[AKD4125-A]
www.DataSheet4U.com
+0
-10
-20
-30
-40
-50
-60
-70
-80
d -90
B -100
F
S -110
-120
-130
-140
-150
-160
-170
-180
-190
-200
20
AK4125 FFT Plot (fsi=48KHz,fso=44.1KHz) AVDD=DVDD=3.3V,Input=-60dBFS,fin=1KHz
50 100 200
500
Hz
1k
2k
Fig 7. FFT Plot (Input = −60dBFS)
5k 10k
20k
AK4125 Frequency_Response (Blue:fsi=48KHz, Red:fsi=96KHz, Green:fsi=192KHz) AVDD=DVDD=3.3V,fso=48KHz
+1
+0.5
-0
-0.5
-1 fsi=192kHz
-1.5
fsi=96kHz
-2
-2.5
d -3
B -3.5
F
S -4
fsi=48kHz
-4.5
-5
-5.5
-6
-6.5
-7
-7.5
-8
2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k
Hz
Fig 8. Frequency Response
<KM078701>
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11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AK4125-A.PDF ] | |
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