Rainbow Electronics MAX9814 - Manual (Page 10)

MAX9814
Microphone Amplifier with AGC and
Low-Noise Microphone Bias
10 ______________________________________________________________________________________
Typical Application Circuit/Functional Diagram
AGC
MICBIAS
BIAS
R MICBIAS
2.21k Ω
R 1
150k Ω
R 2
100k Ω
MICIN
C OUT
GND
V DD
C IN
0.1 µF
A/R
MICBIAS
GAIN
TH
OUT
V
DD
V
DD
SHDN
C BYPASS
1 µF
C BIAS
0.47 µF
CG
C CG
2.2 µF
CT
C CT
47nF
REF
LNA VGA
R OUT
*THE DEVICE HAS BEEN CONFIGURED WITH AN ATTACK TIME OF 1.1ms, 40dB GAIN, AND AN ATTACK-AND-RELEASE RATIO OF 1:500.
MAX9814