OPA378_1 Datasheet, PDF (1/24 Pages) Texas Instruments – Low-Noise, 900kHz, RRIO, Precision OPERATIONAL AMPLIFIER Zerø-Drift Series

OPA378
OPA2378
www.ti.com ..................................................................................................................................................... SBOS417C – JANUARY 2008 – REVISED JUNE 2009
Low-Noise, 900kHz, RRIO,
Precision OPERATIONAL AMPLIFIER
Zerø-Drift Series
FEATURES
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•23 LOW NOISE
– 0.4µV_PP, 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
0.1Hz TO 10Hz NOISE
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
(50µV max) and offset voltage drift (0.25µV/°C max).
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.
NOISE SPECTRAL DENSITY vs FREQUENCY
1k
Continues with No 1/f (flicker) Noise
Current Noise
100
Voltage Noise
10
Time (1s/div)
1
1
10
100
1k
10k
Frequency (Hz)
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
microPOWER is a trademark of Texas Instruments Incorporated.
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All other trademarks are the property of their respective owners.
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UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2009, Texas Instruments Incorporated