INA4181A2QPWRQ1

Instrumentation, Op Amps, Buffer Amps Overview

The INA4181A2QPWRQ1 is a quad-channel, bidirectional current-sense amplifier designed for automotive applications. It operates with a supply voltage range of 2.7 V to 5.5 V and supports common-mode voltages from –0.2 V to 26 V. The device features a fixed gain of 50 V/V, a maximum quiescent current of 900 µA, and an output slew rate of 2 V/µs. It is housed in a 20-pin TSSOP package and meets AEC-Q100 Grade 1 qualification standards.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 standards
• Bidirectional sensing capability for both high-side and low-side configurations
• Integrated matched resistor network for minimized gain error and temperature drift
• Functional safety capable with documentation available for system design

Instrumentation, Op Amps, Buffer Amps Applications

• Motor control systems
• Battery monitors and balancers
• Power management circuits
• Lighting control units

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'Q1' confirms automotive grade status and 'A2' denotes the 50 V/V gain option. Ensure the PW package corresponds to the required 20-pin TSSOP footprint. Confirm RoHS compliance and check for functional safety documentation requirements if deploying in safety-critical environments.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when multiple independent current channels are required within a single package. The 50 V/V gain suits applications needing moderate amplification without excessive output saturation. Consider the 26 V common-mode range for high-side monitoring on standard automotive bus architectures.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the INAx181-Q1 family, which includes single (INA181), dual (INA2181), and quad (INA4181) channel variants. All members share identical electrical characteristics and pinout logic but differ in channel count and package options. The family targets cost-optimized, high-performance automotive current sensing.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Compatible substitutes include other parts within the INAx181-Q1 family such as INA4181A1QPWRQ1 or INA4181A3QPWRQ1, provided the gain difference is acceptable. Cross-family replacements require verification of pin compatibility and electrical parameter alignment.