Time(1s/div)

Time(1s/div)

0.1HzTO10HzNOISE

Frequency(Hz)

NOISESPECTRALDENSITYvsFREQUENCY

1

Frequency(Hz)

10

100

1k

10k

1k

100

10

1

CurrentNoise

VoltageNoise

ContinueswithNo1/f(flicker)Noise

OPA378

OPA2378

www.ti.com

SBOS417D – JANUARY 2008 – REVISED OCTOBER 2009

Low-Noise, 900kHz, RRIO,

Precision OPERATIONAL AMPLIFIER

Zerø-Drift Series

Check for Samples: OPA378 OPA2378

1

FEATURES

DESCRIPTION

23

•

LOW NOISE

The

OPA378

and

OPA2378

represent

a

new

generation of Zerø-Drift, microPOWER™ operational

–

0.4

μVPP, 0.1Hz to 10Hz

amplifiers that use a proprietary auto-calibration

–

20nV/

√Hz at 1kHz

technique to provide minimal input offset voltage

•

ZERØ-DRIFT SERIES

(20

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

–

LOW OFFSET VOLTAGE: 20

μV

combination of low input voltage noise, high gain

bandwidth (900kHz), and low power (150

μA max)

–

LOW OFFSET DRIFT: 0.1

μV/°C

enable

these

devices

to

achieve

optimum

•

QUIESCENT CURRENT: 125

μA

performance for low-power precision applications. In

•

GAIN BANDWIDTH: 900kHz

addition, the excellent PSRR performance, coupled

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

•

RAIL-TO-RAIL INPUT/OUTPUT

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

•

EMI FILTERING

choice for single-supply applications that run directly

•

SUPPLY VOLTAGE: 2.2V to 5.5V

from batteries without regulation.

•

microSIZE PACKAGES: SC70 and SOT23

The OPA378 (single version) is available in both a

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

APPLICATIONS

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

package. All versions are specified for operation from

•

PORTABLE MEDICAL DEVICES

–40°C to +125°C.

–

GLUCOSE METERS

–

OXYGEN METERING

–

HEART RATE MONITORS

•

WEIGH SCALES

•

BATTERY-POWERED INSTRUMENTS

•

THERMOPILE MODULES

•

HANDHELD TEST EQUIPMENT

•

SENSOR SIGNAL CONDITIONING

1

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.

2

microPOWER is a trademark of Texas Instruments Incorporated.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.