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Texas Instruments INA199A2RSWT — Analog & Data Acquisition

INA199A2RSWT Current Sense Amplifier, ±1.5% Accuracy

MPNINA199A2RSWT
End of Life

Texas Instruments INA199A2RSWT, Current Sense Amplifier, ±1.5% accuracy, High/Low-Side sensing, -0.3V to 26V input, 14kHz bandwidth, 10-UQFN (1.8x1.4), -40°C to 125°C.

$1.35Ref. price · indicative, final on quote
Texas Instruments INA199A2RSWT datasheet (PDF)
Packaging10-UFQFN
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

INA199A2RSWT specifications
ParameterValue
MountingSurface Mount
Voltage - input-0.3V ~ 26V
Operating temperature-40°C ~ 125°C
PackageTape & Reel (TR); Cut Tape (CT)
Accuracy±1.5%
FunctionCurrent Sense
Case10-UFQFN
Sensing methodHigh/Low-Side

Product details

What this current sense amplifier does on your board

The Texas Instruments INA199A2RSWT is a current-sense amplifier that measures voltage across a shunt resistor on either the high side or low side of the supply rail. The ±1.5% accuracy over the full temperature range keeps the power-monitoring budget tight enough for most industrial and automotive loads without requiring a precision instrumentation amplifier.

No separate automotive-grade variant is needed for most chassis and cabin-domain applications.

It is ROHS3 compliant.

Frequently asked questions

What is the accuracy of INA199A2RSWT?

The accuracy is ±1.5%, which is the maximum error over the full temperature range. This is the figure to use for worst-case power-budget calculations.

What is the closest functional alternative to INA199A2RSWT?

The INA199B2QDCKRQ1 is an automotive-qualified (AEC-Q100) zero-drift variant with the same ±1.5% accuracy and high/low-side sensing. It operates down to 0.1V input and shares the same -40°C to 125°C range, making it a drop-in replacement for designs needing automotive certification or lower offset drift.