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TL/H/8446
L
December 1994
LM368-2.5 Precision Voltage Reference
General Description
The LM368-2.5 is a precision, monolithic, temperature-com-
pensated voltage reference. The LM368-2.5 makes use of
thin-film technology enhanced by the discrete laser trim-
ming of resistors to achieve excellent Temperature coeffi-
cient (Tempco) of V
OUT
(as low as 11 ppm/
§
C), along with
tight initial tolerance, (as low as 0.02%). The trim scheme is
such that individual resistors are cut open rather than being
trimmed (partially cut), to avoid resistor drift caused by elec-
tromigration in the trimmed area. The LM368-2.5 also pro-
vides excellent stability vs. changes in input voltage and
output current. The output is short circuit proof. A trim pin is
made available for fine trimming of V
OUT
or for obtaining
intermediate values without greatly affecting the Tempco of
the device.
Features
Y
400
m
A operating current
Y
Low output impedance
Y
Excellent line regulation (.0001%/V typical)
Y
Single-supply operation
Y
Externally trimmable
Y
Low temperature coefficient
Y
Excellent initial accuracy (0.02% typical)
Y
Best reference available for low-voltage operation
(V
S
e
5V, V
REF
e
2.500V)
Connection Diagram
Metal Can Package (TO-5)
TL/H/8446–1
Top View
*
case connected to V
b
Order Number LM368H-2.5 LM368YH-2.5
See NS Package Number H08C
Typical Applications
Low Voltage Reference
TL/H/8446–2
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.