AK5730 Datasheet, PDF (47/50 Pages) Asahi Kasei Microsystems – 4-Channel Differential Audio ADC for Line & Mic Inputs

SYSTEM DESIGN
Figure 45 shows the system connection diagram example.
[AK5730]
Mic
Line
Battery
2.2u
2.2u
2.2u
+
+
2.2u
1u
CP1
CN1
CP2
CN2
CVP1
CVP2
IN1P
IN1N
1u
1u
IN4P
1u
IN4N
INM1P
INM1N
INM4P
INM4N
VBATM
+
10u
0.1u
Mic
Bias,
CP
Amp
+
-
MCLK
ADC1
Amp
+
-
ADC4
1
2
MUX
7
8
9
SAR
ADC
+
10u
0.1u
SPI
VREF
MUX
PLL
HPF,
LPF,
Gain
IIS
TDM Out
Mic.
Diags
IIC or SPI
I/F
1u
MCLK
BICK
LRLK
SDTO1
SDTO2
TDMI
MSN
PDN
CAD0/CSN
CAD1/CDTO
SDA/CDTI
SCL/CCLK
INT
10k
DVDD
Figure 45. Typical Connection Diagram
■ Grounding and Power Supply Decoupling
AVDD should be supplied from an analog supply unit with low impedance and be separated from system digital supply.
An electrolytic capacitor of 10μF parallel with a 0.1μF ceramic capacitor should be attached to AVDD, DVDD, VSS1
and VSS2 pin to eliminate the effects of high frequency noise. The 0.1μF ceramic capacitor should be placed as near to
DVDD as possible.
Rev 0.8
- 47 -
2013/06