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參數(shù)資料
| 型號： | AK4620A |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 24 BIT 192KHZ AUDIO CODEC WITH IPGA |
| 中文描述： | 24位192kHz的音頻編解碼器單親遺傳算法 |
| 文件頁數(shù)： | 36/42頁 |
| 文件大?。?/td> | 395K |
| 代理商： | AK4620A |
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ASAHI KASEI
[AK4620A]
MS0368-E-00
2004/12
- 36 -
1
Analog Ground
Digital Ground
System
Controller
2
3
4
5
6
7
8
9
10
11
12
30
29
28
27
26
25
24
23
22
21
20
19
13
14
18
17
VCOM
AINR+
AINR-/NC
AINL+
AINL-/NC
VREF
AGND
VA
P/S
MCLK
LRCK
BICK
AOUTR+
AOUTR-
AOUTL+
AOUTL-
DGND
VD
VT
ADMODE
DEM0
PDN
DFS0
CSN/DIF
AK4620A
SDTO
SDTI
CCLK/CKS1
CDTI/CKS0
15
16
OVFR/DZFR
OVFL/DZFL
Figure 16. Ground Layout
1. Grounding and Power Supply Decoupling
The AK4620A requires careful attention to power supply and grounding layout. To minimize coupling from digital noise,
decoupling capacitors should be connected to VA, VD and VT respectively. VA is supplied from the analog supply in the
system, and VD and VT are supplied from the digital supply in the system. Power lines of VA, VD and VT should be
distributed separately from the point with low impedance of regulator etc. The power up sequence is not critical among
VA, VD and VT.
AGND and DGND must be connected to one analog ground plane.
Decoupling capacitors
should be as near to the AK4620A as possible, with the small value ceramic capacitor being the nearest.
2. Voltage Reference
The differential voltage between VREF and AGND sets the analog input/output range. VREF pin is normally connected
to VA with a 0.1
μ
F ceramic capacitor. VCOM is the signal ground of this chip. A 10
μ
F electrolytic capacitor in parallel
with a 0.1
μ
F ceramic capacitor attached to VCOM pin eliminates the effects of high frequency noise. No load current may
be drawn from VCOM pin. All signals, especially clocks, should be kept away from the VREF and VCOM pins in order
to avoid unwanted coupling into the AK4620A.
3. ADC Output
The ADC output data format is 2’s complement. The DC offset, including the ADC’s own DC offset, is removed by the
internal HPF. The AK4620A samples the analog inputs at 128fs. The digital filter rejects noise above the stopband except
for multiples of 128fs.
相關PDF資料 |
PDF描述 |
|---|---|
| AK4620AVF | 24 BIT 192KHZ AUDIO CODEC WITH IPGA |
| AK4620B | 24-Bit 192kHz Audio CODEC with IPGA |
| AK4620BVF | 24-Bit 192kHz Audio CODEC with IPGA |
| AK4626A | High Performance Multi-channel Audio CODEC |
| AK4626AVQ | High Performance Multi-channel Audio CODEC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AK4620AVF | 制造商:AKM 制造商全稱:AKM 功能描述:24 BIT 192KHZ AUDIO CODEC WITH IPGA |
| AK4620AVFP-E2 | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
| AK4620B | 制造商:AKM 制造商全稱:AKM 功能描述:24-Bit 192kHz Audio CODEC with IPGA |
| AK4620BVF | 制造商:AKM 制造商全稱:AKM 功能描述:24-Bit 192kHz Audio CODEC with IPGA |
| AK4620BVFPE2 | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
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