2.5V LOW POWER
PRECISION REFERENCE SOURCE
ISSUE 1 - OCTOBER 1995
DEVICE DESCRIPTION
The ZRT025 is a monolithic integrated circuit
providing a precise stable reference voltage
of 2.5V at 500碌A(chǔ).
The circuit features a knee current of 150碌A(chǔ)
and operation over a wide range of
temperatures and currents.
The ZRT025 is available in a 3-pin metal can
package for through hole applications as
well as SOT223 and SO8 packages for
surface mount applications. Each package
option offers a trim facility whereby the
output voltage can be adjusted as shown in
F i g . 1. Thi s f a ci l i t y i s u sed w he n
compensating for system errors or setting
the reference output to a particular value.
When the trim facility is not used, the pin
should be left open circuit.
ZRT025
FEATURES
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Trimmable output
Excellent temperature stability
Low output noise figure
Available in two temperature ranges
1 and 2% initial voltage tolerance
versions available
No external stabilising capacitor
required in most cases
Low slope resistance
No derating required at low
temperatures
TO18 package
SOT223 and SO8 small outline
packages
SCHEMATIC DIAGRAM
R
V
CC
V
R
R=V
CC
-V
R
I
R
R
T
=100k
(Optional trim facility)
G
nd
G
nd
This circuit will allow the reference to be
trimmed over a wide range. The device is
specified over a 5% trim range.
4-279
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