2.5V LOW POWER
PRECISION REFERENCE SOURCE
ISSUE 1 - OCTOBER 1995
ZRT025
DEVICE DESCRIPTION
FEATURES
The ZRT025 is a monolithic integrated circuit
providing a precise stable reference voltage
of 2.5V at 500µA.
Trimmable output
•
Excellent temperature stability
Low output noise figure
•
•
•
•
The circuit features a knee current of 150µA
and operation over a wide range of
temperatures and currents.
Available in two temperature ranges
1 and 2% initial voltage tolerance
versions available
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
Fig.1. This facility is used when
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.
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
VR
VCC
R=VCC-VR
IR
RT=100k
(Optional trim facility)
Gnd
Gnd
This circuit will allow the reference to be
trimmed over a wide range. The device is
specified over a Ϯ5% trim range.
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