4.0V LOW POWER
PRECISION REFERENCE SOURCE
ZRT040
ISSUE 3 - JANUARY 2003
DEVICE DESCRIPTION
FEATURES
The ZRT040 is a monolithic integrated circuit
providing a precise stable reference voltage
of 4.01V 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 three temperature ranges
1 and 2% initial voltage tolerance
versions available
The ZRT040 is available in a SOT223 package
for surface mount applications. This device
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
•
•
SOT223 small outline packages
SCHEMATIC DIAGRAM
R
R
V
CC
V
CC
R
R=V -V
T
R =100k
R
I
(Optional trim facility)
nd
G
nd
G
Figure 1:
This circuit will allow the reference to be
trimmed over a wide range. The device is
specified over a 65% trim range.
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