Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
MAX9812/MAX9813
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND)
V
CC
........................................................................-0.3V to +6.0V
All Other Pins..............................................-0.3V to (V
CC
+ 0.3V)
Continuous Current (IN,
SHDN,
IN1, IN2, IN1/IN2)...........±20mA
OUT, BIAS Short-Circuit Duration (to GND or V
CC
) ...Continuous
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW
8-Pin SOT23 (derate 8.9mw/°C above +70°C) ............714mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
= 3.3V, I
BIAS
= 500µA (MAX9812L/MAX9813L), V
CC
= 5V, I
BIAS
= 800µA (MAX9812H/MAX9813H), GND = 0V, R
L
= open,
SHDN
= V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
GENERAL
Supply Voltage Range
Supply Current
Shutdown Supply Current
Amplifier Output Bias Voltage
Input Resistance
Voltage Gain
V
CC
I
CC
I
CC_SHDN
V
OUT_DC
R
IN
A
V
DC
Power-Supply Rejection Ratio
PSRR
OUT
Input referred, T
A
= +25°C
f = 217Hz
f = 1kHz
f = 10kHz
R
L
= 10kΩ to V
CC
/2
V
OH
Output Voltage Swing
V
OL
Output Short-Circuit Current
Small-Signal -3dB Bandwidth
Output Capacitive-Load Stability
Output Impedance
Output Slew Rate
I
OUT_SC
BW
C
L
Z
OUT
SR
R
L
= 1kΩ to V
CC
/2
R
L
= 10kΩ to V
CC
/2
R
L
= 1kΩ to V
CC
/2
Sinking or sourcing
V
OUT
= 10mV
P-P
No sustained oscillations
f = 1kHz
V
OUT
= 1V step
3
V
CC
-
0.25V
19
90
MAX9812L/MAX9813L
MAX9812H/MAX9813H
I
BIAS
= 0
SHDN
= GND
MAX9812L/MAX9813L
MAX9812H/MAX9813H
1.35
2.25
Inferred from
PSRR test
2.7
4.5
230
0.1
1.5
2.5
85
20
100
100
100
90
V
CC
-
0.1
V
CC
-
0.1V
0.1
0.1
12
400
50
0.5
1
0.25
24
mA
kHz
pF
Ω
V/µs
V
dB
21
3.6
5.5
400
1
1.65
2.75
V
µA
µA
V
kΩ
dB
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
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DALLAS [ DALLAS SEMICONDUCTOR ]
