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LT1637

The LT

and split supplies with a total voltage of 2.7V to 44V. The

LT1637 has a gain-bandwidth product of 1.1MHz while

drawing less than 250

µAofquiescentcurrent.TheLT1637

can be shut down, making the output high impedance and

reducing the quiescent current to only 3

µA. The LT1637 is

reverse supply protected: it draws virtually no current for

reverse supply up to 25V. The input range of the LT1637

includes both supplies and the output swings to both

supplies. Unlike most micropower op amps, the LT1637

can drive heavy loads; its rail-to-rail output drives 25mA.

The LT1637 is unity-gain stable into all capacitive loads up

to 4700pF when optional 0.22

µF and 150Ω compensation

is used.

The LT1637 has a unique input stage that operates and

remains high impedance when above the positive supply.

The inputs take 44V both differential and common mode,

even when operating on a 3V supply. Built-in resistors

protect the inputs for faults below the negative supply up

to 22V. There is no phase reversal of the output for inputs

The LT1637 op amp is available in the 8-pin MSOP, PDIP

and SO packages.

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Battery or Solar Powered Systems:

Portable Instrumentation

Sensor Conditioning

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Supply Current Sensing

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Battery Monitoring

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MUX Amplifiers

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4mA to 25mA Transmitters

, LTC and LT are registered trademarks of Linear Technology Corporation.

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Rail-to-Rail Input and Output

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Micropower: 250

µA Supply Current Max

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Gain-Bandwidth Product: 1.1MHz

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Slew Rate: 0.4V/

µs

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Low Input Offset Voltage: 350

µV Max

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Single Supply Input Range: – 0.4V to 44V

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High Output Current: 25mA Min

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Specified on 3V, 5V and

±15V Supplies

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Output Shutdown

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Output Drives 4700pF with Output Compensation

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Reverse Battery Protection to 25V

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High Voltage Gain: 800V/mV

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High CMRR: 110dB

Over-The-Top is a trademark of Linear Technology Corporation.

Over-The-Top

SHDN

LT1004-1.2

4.7

µF

2k

*OPTIONAL FOR LOW OUTPUT CURRENTS,

R* = R

R

4V TO 44V

TP0610

1637 TA01

R*

–

+

LT1637

e.g., 10mA = 120

Ω

1.2

R

+

6V

4V

2V

0V

10mA

5mA

0mA

100

µs/DIV

1637 TA01b

Switchable Precision Current Source

Current Source Timing

APPLICATIO S

TYPICAL APPLICATIO

1.1MHz, 0.4V/

µs

Over-The-Top Micropower, Rail-To-Rail

Input and Output Op Amp

FEATURES

DESCRIPTIO