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9V TO 40V
R
S
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-
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• 0.6 mA to 15 mA Operating Current
compensated 6.9V zener reference with dynamic
• 0.8Ω 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
• 7μV 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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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
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.
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