SCHEMATIC DIAGRAM
PRECISION 1.25 VOLT
MICROPOWER VOLTAGE REFERENCE
ISSUE 2 - FEBRUARY 1997
ZRA125
V
R
G
nd
DEVICE DESCRIPTION
The ZRA125 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 1.25 volts. The device is available
in small outline surface mount packages, ideal
for applications where space saving is
important, as well as packages for through hole
requirements.
The ZRA125 design provides a stable voltage
without an external capacitor and is stable with
capacitive loads. The ZRA125 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 a
suggested 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.
FEATURES
• Small outline SOT23, SO8 and TO92 style
packages
• No stabilising capacitor required
• Typical T
C
30ppm/°C
• Typical slope resistance 0.65Ω
• ± 3%,2% and 1% tolerance
• Industrial temperature range
• Operating current 50µA to 5mA
• Transient response, stable in less than 10µs
• Optional extended current range
APPLICATIONS
• Battery powered and portable equipment.
• Metering and measurement systems.
• Instrumentation.
• Data acquisition systems.
• Precision power supplies.
• Test equipment.
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