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Texas Instruments INA281B2IDBVR — Analog & Data Acquisition

TI INA281B2IDBVR Current Sense Amplifier, 1.3 MHz, SOT-23-5

MPNINA281B2IDBVR
End of Life

Texas Instruments INA281B2IDBVR, Current Sense Amplifier, 1 Circuit, SOT-23-5, 2.7 V to 20 V supply, 1.3 MHz GBW, 2.5 V/µs slew rate, -40°C to 125°C.

$2.63Ref. price · indicative, final on quote
Texas Instruments INA281B2IDBVR datasheet (PDF)
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

INA281B2IDBVR specifications
ParameterValue
MountingSurface Mount
Amplifier typeCurrent Sense
Voltage - input offset55 µV
Voltage - supply span2.7 V
Current - supply1.5mA
Current - input bias20 µA
Operating temperature-40°C ~ 125°C (TA)
Gain bandwidth product1.3 MHz
PackageTape & Reel (TR); Cut Tape (CT)
Slew rate2.5V/µs
CaseSC-74A, SOT-753
Number of circuits1

Product details

It operates from a 2.7 V to 20 V supply span and delivers a gain-bandwidth product of 1.3 MHz with a 2.5 V/µs slew rate. It is a current-sense amplifier, so its primary role is to amplify the voltage across a shunt resistor for load-current monitoring in power supplies, motor drives, and battery chargers.

The 1.3 MHz gain-bandwidth product sets the usable bandwidth for the current-sense signal.

The 2.7 V to 20 V supply span means this amplifier can run off a 2.7 V to 20 V supply.

The INA281B2IDBVR is offered in a SOT-23-5 package. It is surface-mount only.

Frequently asked questions

What is the replacement for INA281B2IDBVR if end-of-life?

There is no end-of-life notice for this part. If a replacement were needed, the INA281A2IDBVR (different gain) or the INA4290A2IRGVR (four-channel, similar bandwidth) are functional alternatives, but verify the gain and channel count for your application.

What is INA281B2IDBVR's listed slew rate?

The slew rate is 2.5 V/µs.