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Texas Instruments INA240A1PWR — Analog & Data Acquisition

INA240A1PWR Current-Sense Amplifier, 400 kHz, 2 V/µs

MPNINA240A1PWR
Active

Texas Instruments INA240A1PWR, current-sense amplifier, 400 kHz -3dB bandwidth, 2 V/µs slew rate, 5 µV input offset, 2.7 V to 5.5 V supply, -40°C to 125°C, 8-TSSOP package.

$3.3900Ref. price · indicative, final on quote
Texas Instruments INA240A1PWR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

INA240A1PWR specifications
ParameterValue
MountingSurface Mount
Amplifier typeCurrent Sense
Voltage - input offset5 µV
Voltage - supply span5.5 V
Current - supply1.8mA
Current - input bias90 µA
Operating temperature-40°C~125°C
-3db bandwidth400 kHz
PackageTape & Reel (TR); Cut Tape (CT)
Slew rate2V/µs
Case8-TSSOP (0.173\", 4.40mm Width)
Number of circuits1

Product details

Current-sense amplifier with 5 µV offset — what that buys you

The INA240A1PWR: Its 5 µV typical input offset voltage means you can resolve a 50 mV full-scale shunt drop with 0.01% error contribution from the amplifier alone — important when the shunt is sized for minimal power dissipation in a 5.5 V system.

Bandwidth and slew rate — transient response matters

The 400 kHz -3 dB bandwidth and 2 V/µs slew rate let this part track current waveforms in switching converters operating at a few hundred kilohertz without significant gain roll-off or slew-induced distortion. For a 12 V/µs edge on the shunt voltage, the amplifier slews at its limit, so budget settling time if the signal chain includes a fast ADC.

The 8-TSSOP is a common pinout for current-sense amplifiers, so board layout reuse across alternate suppliers is straightforward.

Frequently asked questions

What is the gain of INA240A1PWR?

The INA240A1PWR is a fixed-gain current-sense amplifier; its gain is set internally by the device variant. The A1 variant provides a gain of 20 V/V. No external gain-setting resistors are needed.

Does INA240A1PWR work with a 5 V supply?

Yes.

Is INA240A1PWR compatible with 3.3 V logic?

Yes. With a minimum supply of 2.7 V, the INA240A1PWR can run from a 3.3 V rail. Its output voltage swings within the supply rails, so it interfaces directly with 3.3 V logic inputs.