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Texas Instruments INA138QPWRQ1 — Analog & Data Acquisition

INA138QPWRQ1 Current Monitor, ±0.5%, 8-TSSOP

MPNINA138QPWRQ1
End of Life

Texas Instruments Automotive, AEC-Q100 series, INA138QPWRQ1 Current Monitor, ±0.5% accuracy, 2.7V to 36V input, 8-TSSOP package, Tape & Reel.

$2.88Ref. price · indicative, final on quote
Texas Instruments INA138QPWRQ1 datasheet (PDF)
Packaging8-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
SeriesAutomotive, AEC-Q100
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

INA138QPWRQ1 specifications
ParameterValue
SeriesAutomotive, AEC-Q100
MountingSurface Mount
Voltage - input2.7V ~ 36V
Operating temperature-40°C ~ 125°C
PackageTape & Reel (TR); Cut Tape (CT)
Accuracy±0.5%
FunctionCurrent Monitor
Case8-TSSOP (0.173\", 4.40mm Width)
Sensing methodHigh-Side

Product details

High-side current sense with AEC-Q100 qualification

The INA138QPWRQ1 is a high-side current monitor from Texas Instruments, part of the Automotive AEC-Q100 series. It measures load current by sensing the voltage drop across a shunt resistor on the supply rail, outputting a proportional current that can be converted to a voltage with a single external resistor. Rated for a 2.7 V to 36 V input range, it monitors bus voltages from a 3.3 V logic rail up to a 24 V automotive battery line without needing an external regulator.

The part is ROHS3 compliant, so it meets the material restriction requirements for European and global markets without a waiver.

What the ±0.5% accuracy means for your BOM

The ±0.5% accuracy is the total output error over temperature, not just at 25°C. Because it is a high-side monitor, the load remains referenced to ground — no need for a separate low-side sense resistor that would lift the load's ground reference. The output current is single-ended, so a single ADC channel on the microcontroller reads the load current directly.

Frequently asked questions

Where can I order INA138QPWRQ1 and how do I get a price?

The INA138QPWRQ1 is available to order through our distribution desk. No minimum order quantity applies for standard tape-and-reel quantities.

Is INA138QPWRQ1 compatible with 3.3V logic?

Yes. The output current can be converted to a voltage with a resistor to ground that falls within a 3.3 V ADC input range.

When sourcing INA138QPWRQ1, what's the closest functional second-source — INA234BIYBJR?

The INA234BIYBJR is a functional peer with the same ±0.5% accuracy, but it operates from a 1.7 V supply and supports both high- and low-side sensing. The INA138QPWRQ1 is a high-side-only monitor with a wider 2.7 V to 36 V input range. The INA234BIYBJR is not a pin-compatible drop-in — the package and pinout differ — so a board layout change is required.