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參數(shù)資料
| 型號： | AKD4353VF |
| 英文描述： | Consumer IC |
| 中文描述： | 消費性IC |
| 文件頁數(shù)： | 31/33頁 |
| 文件大小： | 251K |
| 代理商： | AKD4353VF |
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ASAHI KASEI
[AK4353]
MS0016-E-02
2001/05
- 31 -
Analog Ground
Digital Ground
System
Controller
MCKO
1
TX
2
DVDD
3
DVSS
4
MCKI
5
BICK
6
SDTI
7
LRCK
8
PDN
9
CSN
10
SCL
11
SDA
12
DZF
24
NC
23
AVDD
22
AVSS
21
VCOM
20
AOUTL
19
AOUTR
18
CAD1
17
CAD0
16
I2C
15
TTL
14
TST
13
AK4353
Figure 14. Ground Layout
Note: AVSS and DVSS must be connected to the same analog ground plane.
1. Grounding and Power Supply Decoupling
The AK4353 requires careful attention to power supply and grounding arrangements. AVDD and DVDD are usually
supplied from analog supply in system. Alternatively if AVDD and DVDD are supplied separately, the power up
sequence is not critical.
AVSS and DVSS of the AK4353 must be connected to analog ground plane.
System analog
ground and digital ground should be connected together near to where the supplies are brought onto the printed circuit
board. Decoupling capacitors should be near to the AK4353 as possible, with the small value ceramic capacitors being the
nearest.
2. Voltage Reference Inputs
The differential voltage between AVDD and AVSS sets the analog output range. VCOM is AVDD/2 and normally
connected to AVDD with a 0.1
μ
F ceramic capacitor. An electrolytic capacitor 10
μ
F 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 these
pins. All signals, especially clocks, should be kept away from the VCOM pin in order to avoid unwanted coupling into the
AK4353.
3. Analog Outputs
The analog outputs are single-ended outputs and 0.6x(AVDD-AVSS) Vpp (typ) centered around the VCOM voltage. The
internal switched-capacitor filter and continuous-time filter attenuate the noise generated by the delta-sigma modulator
beyond the audio passband. The input data format is 2’s complement. The output voltage is a positive full scale for
7FFFFF(@24bit) and a negative full scale for 800000H(@24bit). The ideal output
is 0V for 000000H(@24bit).
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