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Texas Instruments INA190A2IDDFR — Analog & Data Acquisition

INA190A2IDDFR Current Sense Amplifier, Zero-Drift, 37 kHz

MPNINA190A2IDDFR
End of Life

Texas Instruments Zero-Drift series, INA190A2IDDFR current sense amplifier, single circuit, 37 kHz gain-bandwidth, 0.3 V/µs slew rate, rail-to-rail output, 1.7 V to 5.5 V supply, TSOT-23-8 package, -40°C to 125°C.

$2.92Ref. price · indicative, final on quote
Texas Instruments INA190A2IDDFR datasheet (PDF)
PackagingSOT-23-8
RoHSROHS3 Compliant
SeriesZero-Drift
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

INA190A2IDDFR specifications
ParameterValue
SeriesZero-Drift
Output typeRail-to-Rail
MountingSurface Mount
Amplifier typeCurrent Sense
Voltage - input offset3 µV
Voltage - supply span5.5 V
Current - supply48µA
Current - input bias500 pA
Operating temperature-40°C ~ 125°C (TA)
Gain bandwidth product37 kHz
PackageTape & Reel (TR); Cut Tape (CT)
Slew rate0.3V/µs
CaseSOT-23-8
Number of circuits1

Product details

What this current sense amplifier does

The Texas Instruments INA190A2IDDFR is a single-channel, zero-drift current sense amplifier in a TSOT-23-8 package. It measures the voltage drop across a shunt resistor and outputs a rail-to-rail voltage proportional to the load current.

Where it fits in a design

This part is built for high-side or low-side current sensing. The rail-to-rail output means the amplifier can swing its output close to the supply rails, preserving dynamic range when the shunt voltage is small. The 48 µA supply current makes it a candidate for always-on monitoring in battery-powered systems — a fuel-gauge front end, for example, or a solar charge controller that needs to log current around the clock.

The TSOT-23-8 package (supplier device package TSOT-23-8) is a surface-mount footprint.

Frequently asked questions

What is the typical application for INA190A2IDDFR?

This current sense amplifier is used for high-side or low-side current measurement in battery monitoring, motor current sensing, power-supply output monitoring, and solar charge controllers. Its zero-drift architecture and low 48 µA supply current suit always-on precision monitoring in industrial and automotive environments.

Is INA190A2IDDFR suitable for high-side current sensing?

Yes, the rail-to-rail output and wide common-mode input range (implied by the current-sense topology) make it suitable for high-side sensing. The 1.7 V to 5.5 V supply range and 3 µV offset support accurate measurements across the full shunt voltage range.