1

LT1797

s

Rail-to-Rail Input and Output

s

Small SOT-23 Package

s

Gain Bandwidth Product: 10MHz

s

–40

°C to 85°C Operation

s

Slew Rate: 2.25V/

µs

s

Low Input Offset Voltage: 1.5mV Max

s

High Output Current: 25mA Min

s

Specified on 3V, 5V and

±5V Supplies

s

High Voltage Gain: 1000V/mV 10k Load

s

High CMRR: 88dB Min

s

High PSRR: 80dB Min

s

Input Bias Current: 300nA Max

s

Input Offset Current: 25nA Max

The LT

able in the small SOT-23 package that operates on all

single and split supplies with a total voltage of 2.7V to 12V.

The amplifier draws 1mA of quiescent current and has a

slew rate of 2.25V/

µs.

The input common mode range of the LT1797 includes

both rails, making it ideal for current sensing applications.

The input stage incorporates phase reversal protection to

prevent false outputs from occurring when the inputs are

driven beyond the supplies. Protective resistors are in-

cluded in the input leads so that current does not become

excessive when the inputs are forced above or below the

supplies.

condition. The amplifier can drive loads up to 25mA and

still maintain rail-to-rail capability.

The LT1797 op amp is available in the space saving 5-lead

SOT-23 package.

s

Portable Instrumentation

s

Rail-to-Rail Buffer Amplifiers

s

Low Voltage Signal Processing

s

Driving A/D Converters

s

Battery-Powered Systems

10MHz, Rail-to-Rail

Input and Output

Op Amp in SOT-23

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

LT1797

0.1

µF

R1 REDUCES Q1 DISSIPATION

Q1

FMMT493

0.003

Ω

1% 3W

BZX84C6V8

–48V SUPPLY

(–42V TO –56V)

3.3k

0805

×3

30.1

Ω

1%

+

–

R1

4.7k

1k

1%

ACCURACY

≈ 3%

–48V LOAD

1797 TA01

SETTLES TO 1% IN 2

µs,

1V OUTPUT STEP

Fast Compact – 48V Current Sense

FEATURES

DESCRIPTIO

APPLICATIO S