1FEATURES
23• LOW NOISE
– 0.4μVPP, 0.1Hz to 10Hz
– 20nV/√Hz at 1kHz
• ZERØ-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 Zerø-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.