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Texas Instruments INA185A4IDRLT — Analog & Data Acquisition

INA185A4IDRLT Current Sense Amplifier, 105 kHz, SOT-563

MPNINA185A4IDRLT
End of Life

Texas Instruments INA185A4IDRLT, Current Sense Amplifier, 1 Circuit, Rail-to-Rail Output, 105 kHz Gain Bandwidth, 2V/µs Slew Rate, 2.7V to 5.5V Supply, -40°C to 125°C, SOT-563 Package.

$1.93Ref. price · indicative, final on quote
PackagingSOT-563, SOT-666
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

INA185A4IDRLT specifications
ParameterValue
Output typeRail-to-Rail
MountingSurface Mount
Amplifier typeCurrent Sense
Voltage - input offset25 µV
Voltage - supply span5.5 V
Current - supply200µA
Current - input bias75 µA
Operating temperature-40°C ~ 125°C (TA)
Gain bandwidth product105 kHz
PackageTape & Reel (TR); Cut Tape (CT)
Slew rate2V/µs
CaseSOT-563, SOT-666
Number of circuits1

Product details

With a gain-bandwidth product of 105 kHz and a 2V/µs slew rate, it's tuned for DC and low-frequency AC current measurements — think motor-phase current monitoring, solenoid drivers, or power-supply output rails. The rail-to-rail output lets it swing close to the supply, which matters when you're running on a 2.7 V minimum rail and need every millivolt of headroom. The 25 µV input offset keeps the error floor low enough that a 10 mV drop across a 10 mΩ shunt resolves with reasonable accuracy.

The SOT-563 package is small — roughly 1.6 mm x 1.6 mm — so the PCB layout needs tight decoupling placement. The supply pins are close together; a 0.1 µF ceramic right at the pins keeps the 200 µA supply current clean. The 75 µA input bias current is non-negligible for a current-sense amp — it means the shunt resistor value should be chosen so the voltage drop dominates the bias current error, especially at low load currents.

Frequently asked questions

Is the INA185A4IDRLT obsolete?

It's ROHS3 compliant and suitable for new designs.

Where can I buy INA185A4IDRLT available via RFQ confirmation?

The INA185A4IDRLT is available through independent distribution.

Is the INA185A4IDRLT compatible with INA185A3IDRLT?

The INA185A3IDRLT is a different gain variant within the same INA185 family. Both share the same SOT-563 package, pinout, and supply range, so they are footprint-compatible — the difference is the gain setting, which affects the transfer function. Verify the gain value against your shunt and ADC range before swapping.