LM136-2.5/LM236-2.5/LM336-2.5V Reference Diode
May 1998
LM136-2.5/LM236-2.5/LM336-2.5V
Reference Diode
General Description
The LM136-2.5/LM236-2.5 and LM336-2.5 integrated cir-
cuits are precision 2.5V shunt regulator diodes. These
monolithic IC voltage references operate as a
low-temperature-coefficient 2.5V zener with 0.2Ω dynamic
impedance. A third terminal on the LM136-2.5 allows the ref-
erence voltage and temperature coefficient to be trimmed
easily.
The LM136-2.5 series is useful as a precision 2.5V low volt-
age reference for digital voltmeters, power supplies or op
amp circuitry. The 2.5V make it convenient to obtain a stable
reference from 5V logic supplies. Further, since the
LM136-2.5 operates as a shunt regulator, it can be used as
either a positive or negative voltage reference.
The LM136-2.5 is rated for operation over −55˚C to +125˚C
while the LM236-2.5 is rated over a −25˚C to +85˚C tem-
perature range.
The LM336-2.5 is rated for operation over a 0˚C to +70˚C
temperature range. See the connection diagrams for avail-
able packages.
Features
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Low temperature coefficient
Wide operating current of 400 µA to 10 mA
0.2Ω dynamic impedance
±
1% initial tolerance available
Guaranteed temperature stability
Easily trimmed for minimum temperature drift
Fast turn-on
Three lead transistor package
Connection Diagrams
TO-92
Plastic Package
TO-46
Metal Can Package
DS005715-8
Bottom View
Order Number LM236Z-2.5,
LM236AZ-2.5, LM336Z-2.5 or LM336BZ-2.5
See NS Package Number Z03A
DS005715-20
Bottom View
Order Number LM136H-2.5,
LM136H-2.5/883, LM236H-2.5,
LM136AH-2.5, LM136AH-2.5/883
or LM236AH-2.5
See NS Package Number H03H
© 1999 National Semiconductor Corporation
DS005715
www.national.com
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