PRECISION 1.25 VOLT
MICROPOWER VOLTAGE REFERENCE
ISSUE 3 - FEBRUARY 1998
DEVICE DESCRIPTION
The ZR423 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 1.25 volts. The device is
available in a TO92 style package for through
hole requirements.
The ZR423 design provides a stable voltage
without an external capacitor and is stable
wi th capaci tive loads. The ZR423 is
recommended for operation between 50µA
and 5mA and so is ideally suited to low
power and battery powered applications.
Excellent performance is maintained to an
absolute maximum of 25mA, however the
rugged design and 20 volt processing allows
the reference to withstand transient effects
and currents up to 200mA. Superior
switching capability allows the device to
reach stable operating conditions in only a
few microseconds.
ZR423
FEATURES
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TO92 style package
No stabilising capacitor required
Typical T
C
30ppm/°C
Typical slope resistance 0.65Ω
±
3% tolerance
Industrial temperature range (Military
temperature range available on request)
Operating current 50µA to 5mA
Transient response, stable in less than
10µs
Alternative package options and
tolerances available
APPLICATIONS
Battery powered and portable
equipment.
Metering and measurement systems.
Instrumentation.
Data acquisition systems.
Precision power supplies.
SCHEMATIC DIAGRAM
V
R
G
nd
4-185
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