June 2005
LM136-2.5/LM236-2.5/LM336-2.5V
Reference Diode
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.
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-
Features
temperature-coefficient 2.5V zener with 0.2Ω dynamic im-
pedance. A third terminal on the LM136-2.5 allows the refer-
ence voltage and temperature coefficient to be trimmed
easily.
n Low temperature coefficient
n Wide operating current of 400 µA to 10 mA
n 0.2Ω dynamic impedance
n
1% initial tolerance available
The LM136-2.5 series is useful as a precision 2.5V low
voltage 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.
n Guaranteed temperature stability
n Easily trimmed for minimum temperature drift
n Fast turn-on
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.
Connection Diagrams
SO Package
TO-92
Plastic Package
00571508
Bottom View
Order Number LM336Z-2.5 or LM336BZ-2.5
See NS Package Number Z03A
00571512
Top View
TO-46
Metal Can Package
Order Number LM236M-2.5,
LM236AM-2.5, LM336M-2.5
or LM336BM-2.5
See NS Package Number M08A
00571520
Bottom View
Order Number LM136H-2.5,
LM136H-2.5/883, LM236H-2.5,
or LM236AH-2.5
See NS Package Number H03H
© 2005 National Semiconductor Corporation
DS005715
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