MAX9812/MAX9813
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
Typical Operating Characteristics
(V
= 3.3V (MAX9812L/MAX9813L), V
= 5V (MAX9812H/MAX9813H), V
= 0V, R = 10kΩ to V /2, SHDN = V , T = +25°C,
GND
L CC CC A
CC
CC
unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO
(V TO BIAS) vs. FREQUENCY
CC
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
GAIN vs. FREQUENCY
0
-10
-20
-30
-40
-50
-60
-70
-80
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
40
30
20
10
0
R = OPEN
V
= 200mV
P-P
L
V
= 200mV
RIPPLE P-P
RIPPLE
V
= 10mV
OUT
P-P
INPUT REFERRED
-90
-100
-110
-120
-130
-140
-150
-10
-20
10
100
1k
10k
100k
1M
10M
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
1k
FREQUENCY (Hz)
10k
100k
FREQUENCY (Hz)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
SUPPLY CURRENT
vs. TEMPERATURE
300
280
260
240
220
200
180
160
140
120
100
0.15
0.14
0.13
0.12
0.11
0.10
0.09
0.08
0.07
0.06
0.05
250
245
240
235
230
225
220
215
210
205
200
MAX9812L
MAX9812H
MAX9812H
MAX9812L
2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6 6.0
SUPPLY VOLTAGE (V)
-40 -25 -10
5
20 35 50 65 80
-40 -25 -10
5
20 35 50 65 80
TEMPERATURE (°C)
TEMPERATURE (°C)
V
BIAS
vs. TEMPERATURE
V vs. I
BIAS BIAS
MAX9812 toc07
MAX9812 toc08
4.03
4.02
2.3002
2.3001
2.3000
2.2999
2.2998
2.2997
4.0002
4.0001
2.33
2.32
2.31
2.30
2.29
2.28
2.27
4.01
4.00
3.99
MAX9812H
MAX9812L
4.0000
3.9999
MAX9812L
MAX9812H
3.98
3.97
3.96
3.9998
-40 -25 -10
5
20 35 50 65 80
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
TEMPERATURE (°C)
I
(mA)
BIAS
Maxim Integrated
4
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
