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100nV/div
Time(1s/div)Time(1s/div)
0.1HzTO10HzNOISE
Frequency(Hz)
NOISESPECTRALDENSITYvsFREQUENCY
1
VoltageNoiseDensity(nV/ )Ö
Hz
CurrentNoise(fA/ )Ö
Hz
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
– 0.4μV
PP
, 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
(20μV) and offset voltage drift (0.1μV/°C). The
– LOW OFFSET VOLTAGE: 20μV combination of low input voltage noise, high gain
bandwidth (900kHz), and low power (150μA max)
– LOW OFFSET DRIFT: 0.1μV/°C
enable these devices to achieve optimum
• QUIESCENT CURRENT: 125μA
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.
2microPOWER is a trademark of Texas Instruments Incorporated.
3All 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.
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