INA4181A3QPWRQ1

Instrumentation, Op Amps, Buffer Amps Overview

The INA4181A3QPWRQ1 is an automotive-grade, bidirectional current-sense amplifier from Texas Instruments. It features a gain of 20 V/V and supports bidirectional high-side and low-side voltage outputs. The device operates with a common-mode voltage range of -26 V to +26 V and functions within a supply voltage range of 2.7 V to 5.5 V. Key electrical specifications include a gain bandwidth product of 350 kHz, a maximum input offset voltage of 100 µV, and a typical input bias current of 75 µA. It provides a common-mode rejection ratio (CMRR) of 84 dB and maintains a gain error of 0.1%. The component is housed in a TSSOP-20 package and is qualified under AEC-Q100 standards for operation between -40°C and +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Supports bidirectional current sensing with both high-side and low-side voltage output capabilities.
• Provides accurate measurement through a specified gain error of 0.1% and high common-mode rejection.
• Operates reliably across a wide common-mode voltage range extending into negative values.

Instrumentation, Op Amps, Buffer Amps Applications

• Automotive battery monitoring systems
• Motor control applications requiring bidirectional current feedback
• Industrial power management circuits

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'Q' confirms AEC-Q100 automotive qualification status before integration. Ensure the 'PWR' package designation matches the required TSSOP-20 footprint on the target PCB layout. Confirm that the design environment meets the specified operating temperature range of -40°C to +125°C. Cross-reference the datasheet revision date to ensure compatibility with latest electrical characteristics.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when bidirectional current measurement is required in automotive environments. The 20 V/V gain suits applications needing moderate amplification without excessive signal swing. Consider the 350 kHz bandwidth for dynamic load responses. Evaluate the TSSOP-20 package size against available board space constraints compared to smaller alternatives.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the INA418x family of current-sense amplifiers designed for automotive use. It complements other devices like the INA4180 by offering quad-channel configurations or different gain options within the same functional architecture. The series emphasizes precision and robustness for harsh automotive electrical environments.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Check for direct pin-compatible substitutes within the INA418x family such as the INA4181A1IPWRQ1 if different gain or channel counts are needed. Verify that any alternative maintains the same AEC-Q100 grade and TSSOP-20 package dimensions for seamless replacement.