1

LT1031/LH0070

1031fb

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Pin Compatible with LH0070 and AD581*

°C Max Slope

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Operates in Series or Shunt Mode

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> 100dB Ripple Rejection

The LT

drift and noise, extremely good long term stability, and

almost total immunity to input voltage variations. The

reference output will both source and sink up to 10mA and

can be used as a shunt regulator (two terminal Zener) with

the same precision characteristics as the three terminal

connection. Special care has been taken to minimize

thermal regulation effects and temperature induced

hysteresis.

The LT1031 reference is based on a buried Zener diode

structure which eliminates noise and stability problems

associated with surface breakdown devices. Further, a

subsurface Zener exhibits better temperature drift and

time stability than even the best band-gap references.

Unique circuit design makes the LT1031 the first three

terminal IC reference to offer ultralow drift without the

use of high power on-chip heaters. Output voltage is

pretrimmed to 0.05% accuracy.

The LT1031 can be used as a plug-in replacement for

the AD581 and LH0070,* with improved electrical and

thermal performance.

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Precision Regulators

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Precision Scales

Basic Positive and

Negative Connections

Precision 10V Reference

Distribution of Output Accuracy

FEATURES

APPLICATIO S

DESCRIPTIO

LT1031

LT1031

IN

OUT

R1 =

R1

OUT

GND

GND

LT1031 • TA01

OUTPUT ACCURACY (%)

–0.10

15

20

25

0

0.06

LT1031 TA02

10

5

0

–0.06

–0.02

0.02

30

35

40

0.10

DISTRIBUTION

FROM 5 RUNS

TYPICAL APPLICATIO

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

All other trademarks are the property of their respective owners.

*See LH0070 Electrical Characteristics table and AD581 cross reference guide.