1

LT1637

1637fd

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

µA of quiescent current. The LT1637

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 re-

verse supply up to 25V. The input range of the LT1637 in-

cludes 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. For space limited applications, the

LT1637 is available in a 3mm

× 3mm × 0.8mm dual fine

pitch leadless package (DFN).

■

Battery or Solar Powered Systems:

Portable Instrumentation

Sensor Conditioning

■

Supply Current Sensing

■

4mA to 25mA Transmitters

■

Rail-to-Rail Input and Output

µA Supply Current Max

°C to 125°C

■

Gain-Bandwidth Product: 1.1MHz

µs

µV Max

■

Single Supply Input Range: – 0.4V to 44V

±15V Supplies

■

Output Shutdown

■

High Voltage Gain: 800V/mV

and a Tiny (3mm

× 3mm × 0.8mm) DFN Package

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

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

1637 TA01b

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

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

All other trademarks are the property of their respective owners.