LM9140

Precision Micropower Shunt Voltage Reference

General Description

The LM9140’s reverse breakdown voltage temperature coef-

The LM9140’s advanced design eliminates the need for an

external stabilizing capacitor while ensuring stability with any

capacitive load, thus making the LM9140 easy to use. Fur-

ther reducing design effort is the availability of several fixed

reverse breakdown voltages: 2.500V, 4.096V, 5.000V, and

10.000V. The minimum operating current increases from

60 µA for the LM9140-2.5 to 100 µA for the LM9140-10.0. All

versions have a maximum operating current of 15 mA.

The LM9140 utilizes fuse and zener-zap reverse breakdown

voltage trim during wafer sort to ensure that the prime parts

Bandgap reference temperature drift curvature correction

and low dynamic impedance ensure stable reverse break-

down voltage accuracy over a wide range of operating tem-

peratures and currents.

Features

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Small package: TO-92

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No output capacitor required

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Tolerates capacitive loads

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Fixed reverse breakdown voltages of 2.500V, 4.096V,

5.000V, and 10.000V

Key Specifications

(LM9140-2.5)

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Temperature coefficient:

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Output voltage tolerance:

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Low output noise (10 Hz to 10 kHz):

35 µV

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Wide operating current range:

60 µA to 15 mA

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Industrial temperature range:

−40˚C to +85˚C

Applications

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Portable, Battery-Powered Equipment

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Data Acquisition Systems

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Instrumentation

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Process Control

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Energy Management

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Product Testing

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Automotive

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Precision Audio Components

Connection Diagram

Ordering Information

Reverse Breakdown

Voltage Tolerance at 25˚C

Z (TO-92)

and Average Reverse Breakdown

Voltage Temperature Coefficient

0.5%, 25 ppm/˚C max

LM9140BYZ-2.5,

LM9140BYZ-4.1,

LM9140BYZ-5.0,

LM9140BYZ-10.0

TO-92

DS011393-2

Bottom View

See NS Package Number Z03A

April 1998

© 1998 National Semiconductor Corporation

DS011393

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