Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain

Microphone Amplifiers with Integrated Bias

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

°C.) (Note 1)

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.

(All voltages referenced to GND)

Continuous Current (IN, SHDN, IN1, IN2, IN1/IN2)...........

±20mA

°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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

GENERAL

MAX9812L/MAX9813L

2.7

3.6

Supply Voltage Range

MAX9812H/MAX9813H

Inferred from

PSRR test

4.5

5.5

V

Supply Current

230

400

µA

Shutdown Supply Current

SHDN = GND

0.1

1

µA

MAX9812L/MAX9813L

1.35

1.5

1.65

Amplifier Output Bias Voltage

MAX9812H/MAX9813H

2.25

2.5

2.75

V

Input Resistance

85

k

Ω

Voltage Gain

19

20

21

dB

DC

90

100

f = 217Hz

100

f = 1kHz

100

Power-Supply Rejection Ratio

f = 10kHz

90

dB

0.1

0.25V

0.1V

0.1

Output Voltage Swing

0.1

0.25

V

Output Short-Circuit Current

Sinking or sourcing

3

12

24

mA

Small-Signal -3dB Bandwidth

BW

400

kHz

Output Capacitive-Load Stability

No sustained oscillations

50

pF

Output Impedance

f = 1kHz

0.5

Ω

Output Slew Rate

SR

1

V/µs