LM329_15 Datasheet, PDF (1/12 Pages) Linear Technology – 6.9V Precision Voltage Reference

LM329
www.ti.com
SNVS748F – MAY 2000 – REVISED APRIL 2013
LM329 Precision Reference
Check for Samples: LM329
FEATURES
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•2 0.6 mA to 15 mA Operating Current
• 0.8Ω Dynamic Impedance at Any Current
• Available With Temperature Coefficient of
0.01%/°C
• 7μV Wideband Noise
• 5% Initial Tolerance
• 0.002% Long Term Stability
• Low Cost
• Subsurface Zener
DESCRIPTION
The LM329 is a precision multi-current temperature-
compensated 6.9V zener reference with dynamic
impedance a factor of 10 to 100 less than discrete
diodes. Constructed in a single silicon chip, the
LM329 uses active circuitry to buffer the internal
zener allowing the device to operate over a 0.5 mA to
15 mA range with virtually no change in performance.
The LM329 is available with a temperature
coefficients of 0.01%/°C. This reference also has
excellent long term stability and low noise.
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
9V TO 40V
R_S
Figure 1. Bottom View
Plastic Package (TO-92)
See Package LP
LM329
6.9V
Figure 2. Simple Reference
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PRODUCTION DATA information is current as of publication date.
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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