LF355AH National Semiconductor, LF355AH Datasheet

LF355AH

Manufacturer Part Number

LF355AH

Description

Series Monolithic JFET Input Operational Amplifiers

Manufacturer

National Semiconductor

Datasheet

1.LF355AH.pdf (18 pages)

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C 1995 National Semiconductor Corporation

LF155 LF156 LF157 Series Monolithic

JFET Input Operational Amplifiers

General Description

These are the first monolithic JFET input operational ampli-

fiers to incorporate well matched high voltage JFETs on the

same chip with standard bipolar transistors (BI-FET

nology) These amplifiers feature low input bias and offset

currents low offset voltage and offset voltage drift coupled

with offset adjust which does not degrade drift or common-

mode rejection The devices are also designed for high slew

rate wide bandwidth extremely fast settling time low volt-

age and current noise and a low 1 f noise corner

Advantages

Applications

Simplified Schematic

BI-FET

3 pF in LF157 series

Replace expensive hybrid and module FET op amps

Rugged JFETs allow blow-out free handling compared

with MOSFET input devices

Excellent for low noise applications using either high or

low source impedance very low 1 f corner

Offset adjust does not degrade drift or common-mode

rejection as in most monolithic amplifiers

New output stage allows use of large capacitive loads

(5 000 pF) without stability problems

Internal compensation and large differential input volt-

age capability

Precision high speed integrators

Fast D A and A D converters

High impedance buffers

Wideband low noise low drift amplifiers

Logarithmic amplifiers

BI-FET II

are trademarks of National Semiconductor Corporation

TL H 5646

Tech-

Common Features

(LF155A LF156A LF157A)

Uncommon Features

Photocell amplifiers

Sample and Hold circuits

Low input bias current

Low Input Offset Current

High input impedance

Low input offset voltage

Low input offset voltage temp drift

Low input noise current

High common-mode rejection ratio

Large dc voltage gain

Extremely

fast settling

time to

0 01%

Fast slew

rate

Wide gain

bandwidth

Low input

noise voltage

LF155A LF156A

2 5

1 5

RRD-B30M115 Printed in U S A

TL H 5646– 1

LF157A

December 1994

1 5

0 01 pA Hz

3 V C

nV Hz

100 dB

106 dB

Units

30 pA

MHz

1 mV

3 pA

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