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1FEATURES

23? LOW NOISE

– 0.4μVPP, 0.1Hz to 10Hz

– 20nV/√Hz at 1kHz

? ZER?-DRIFT SERIES

– LOW OFFSET VOLTAGE: 20μV

– LOW OFFSET DRIFT: 0.1μV/°C

? QUIESCENT CURRENT: 125μA

? GAIN BANDWIDTH: 900kHz

? RAIL-TO-RAIL INPUT/OUTPUT

? EMI FILTERING

? SUPPLY VOLTAGE: 2.2V to 5.5V

? microSIZE PACKAGES: SC70 and SOT23

APPLICATIONS

? PORTABLE MEDICAL DEVICES

– GLUCOSE METERS

– OXYGEN METERING

– HEART RATE MONITORS

? WEIGH SCALES

? BATTERY-POWERED INSTRUMENTS

? THERMOPILE MODULES

? HANDHELD TEST EQUIPMENT

? SENSOR SIGNAL CONDITIONING

DESCRIPTION

The OPA378 and OPA2378 represent a new

generation of Zer?-Drift, microPOWER? operational

amplifiers that use a proprietary auto-calibration

technique to provide minimal input offset voltage

(20μV) and offset voltage drift (0.1μV/°C). The

combination of low input voltage noise, high gain

bandwidth (900kHz), and low power (150μA max)

enable these devices to achieve optimum

performance for low-power precision applications. In

addition, the excellent PSRR performance, coupled

with a wide input supply range of 2.2V to 5.5V and

rail-to-rail input and output, makes it an outstanding

choice for single-supply applications that run directly

from batteries without regulation.

The OPA378 (single version) is available in both a

microSIZE SC70-5 and a SOT23-5 package. The

OPA2378 (dual version) is offered in a SOT23-8

package. All versions are specified for operation from

–40°C to +125°C.