MAX9812/MAX9813
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
V
DD
0.1µF
V
PV
DD
DD
0.047µF
BIAS
SV
27.4kΩ
DD
33.2kΩ
15kΩ
1µF
GAINLB
V
DD
220µF
10kΩ
0.1µF
GAINLA
OUTL+
220kΩ
15kΩ
0.1µF
V
CC
IN1/IN2
INL1
INL2
INR1
INR2
OUT
0.1µF
0.68µF
0.68µF
IN1
OUTL-
15kΩ
15kΩ
15kΩ
HPF
22kΩ
MAX9813
CODEC
IN2
MAX9760
0.68µF
0.68µF
2.2kΩ
BIAS
SHDN
OUTR-
GND
HPF
2.2kΩ
OUTR+
V
DD
0.1µF
220µF
10kΩ
15kΩ
V
GAINRA
GAINRB
DD
33.2kΩ
27.4kΩ
1kΩ
1kΩ
10kΩ
680kΩ
SCL
SDA
ADD
INT
0.047µF
47kΩ
HPS
MICROCONTROLLER
SHDN
Figure 1. Typical Application Circuit
Maxim Integrated
8