LINEAR LT1002 Dual, Matched Precision Operational Amplifier Data Sheet

LT1002

Dual, Matched Precision Operational Amplifier

FEATURES DESCRIPTION

Guaranteed low offset voltage The LT®1002 dual, matched precision operational amplifiers LT1002A 60µV max combine excellent individual amplifier performance with tight LT1002 100µV max matching and temperature tracking between amplifiers. Guaranteed offset voltage match

In the design, processing, and testing of the device, particular

LT1002A 40µV max

attention has been paid to the optimization of the entire

LT1002 80µV max

distribution of several key parameters and their matching.

Guaranteed low drift

Consequently, the specifications of even the low cost commer-

LT1002A 0.9µV/°C max

cial grade (the LT1002C) have been spectacularly improved

LT1002 1.3µV/°C max

compared to presently available devices.

Guaranteed CMRR

LT1002A 110d B min Essentially, the input offset voltage of all units is less than LT1002 110d B min 80µV, and matching between amplifiers is consistently beter Guaranteed channel separation than 60µV (see distribution plot below). Input bias and offset LT1002A 132d B min currents, channel separation, common mode and power suply LT1002 130d B min rejections of the LT1002C are all specified at levels which were Guaranteed maching characteristics previsouly attainable only on very expensive, selected grades Low noise 0.35µV p-p of other dual devices. Power dissipation is nearly halved compared to the most popular precision duals, without ad- APPLICATIONS NU BE OF NI TS versely affecting noise or speed performance. A by-product of lower dissipation is decreased warm-up drift. For even better

Thermocouple Amplifiers

performance in a single precision op amp, refer to the LT1001

Strain Gauge Amplifiers

data sheet. A bridge signal conditioning application is shown

Low level signal processing

below. This circuit illustrates the requirement for both excel-

Medical instrumentation

lent matching and individual amplifier specifications.

Precision dual limit threshold detection

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

Strain Gauge Signal Conditioner with Bridge Excitation Distribution of Offset Voltage Match

100Ω 5W VS = ±15V

REFERENCE OUT TA = 25°C

2k TO MONITORING

1/2LT1002 2N2219

A/D CONVERTER 287 UNITS TESTED

LM329 4.99k*

IN4148

350Ω BRIDGE

0 TO 10V

10k LT1001 OUT*

IN4148 GAIN TRIM

1/2LT1002

5W INPUT OFFSET VOLTAGE MATCH (µV)

*RN60C FILM RESISTORS 1002 TA01

–15V 1002 TA02