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Texas Instruments INA240A2PWR — Analog & Data Acquisition

INA240A2PWR Current-Sense Amplifier, 400 kHz Bandwidth

MPNINA240A2PWR
End of Life

Texas Instruments INA240A2PWR zero-drift current-sense amplifier, 2.7 V to 5.5 V supply, 400 kHz bandwidth, 5 µV input offset, 2 V/µs slew rate, -40°C to 125°C, 8-TSSOP package.

$3.4900Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

INA240A2PWR 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

Zero-drift current sense for shunt monitoring

Its 5 µV input offset voltage and 400 kHz bandwidth make it suited for precision monitoring in motor-drive phase currents, solenoid loads, and power-supply output rails where the shunt drop must be resolved down to microvolt levels without external trimming.

The 400 kHz -3 dB bandwidth supports current-loop bandwidths up to several tens of kHz, adequate for PWM-switched loads at typical switching frequencies below 200 kHz. The 2 V/µs slew rate ensures the output settles within one switching cycle when the shunt voltage steps from zero to full-scale, avoiding measurement lag in fast-overcurrent detection paths.

Supply rails and temperature range — deployment envelope

The 1.8 mA quiescent supply current keeps the thermal budget light in densely populated boards.

Package and footprint — 8-TSSOP

The 90 µA input bias current is typical for a bipolar-input current-sense amplifier; the shunt resistor value should be chosen so that the bias current does not introduce a significant voltage drop error at the sense nodes.

Frequently asked questions

Is the INA240A2PWR obsolete?

No.

How does the INA240A2PWR compare to the INA240A1PWR?

Both are pin-compatible zero-drift current-sense amplifiers in the INA240 family. The A2 variant has a gain of 50 V/V, while the A1 variant has a gain of 20 V/V. The A2's higher gain resolves smaller shunt voltages at the expense of a proportionally reduced full-scale input range.