9V TO 40V

LM329

6.9V

LM329

www.ti.com

SNVS748F – MAY 2000 – REVISED APRIL 2013

LM329 Precision Reference

Check for Samples: LM329

1

FEATURES

DESCRIPTION

The LM329 is a precision multi-current temperature-

2

•

0.6 mA to 15 mA Operating Current

compensated 6.9V zener reference with dynamic

•

0.8

Ω Dynamic Impedance at Any Current

impedance a factor of 10 to 100 less than discrete

•

Available With Temperature Coefficient of

diodes. Constructed in a single silicon chip, the

0.01%/°C

LM329 uses active circuitry to buffer the internal

zener allowing the device to operate over a 0.5 mA to

•

7

μV Wideband Noise

15 mA range with virtually no change in performance.

•

5% Initial Tolerance

The

LM329

is

available

with

a

temperature

•

0.002% Long Term Stability

coefficients of 0.01%/°C. This reference also has

excellent long term stability and low noise.

•

Low Cost

•

Subsurface Zener

A new subsurface breakdown zener used in the

LM329 gives lower noise and better long-term

stability than conventional IC zeners. Further the

zener and temperature compensating transistor are

made by a planar process so they are immune to

problems that plague ordinary zeners. For example,

there is virtually no voltage shift in zener voltage due

to temperature cycling and the device is insensitive to

stress on the leads.

The LM329 can be used in place of conventional

zeners with improved performance. The low dynamic

impedance simplifies biasing and the wide operating

current allows the replacement of many zener types.

The LM329 for operation over 0°C to 70°C is

available in a TO-92 epoxy package.

Connection Diagram

Typical Application

Figure 1. Bottom View

Plastic Package (TO-92)

See Package LP

Figure 2. Simple Reference

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2000–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.