INA181A2QDCKRQ1

Overview

The INA181A2QDCKRQ1 is a single-channel, bidirectional current-sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 Grade 1 qualification. It operates over an extended temperature range of -40°C to +125°C and supports a common-mode voltage range from -0.2V to 26V, independent of the supply voltage. The device features a fixed gain of 50 V/V, a bandwidth of 210 kHz, and a maximum quiescent current of 260 µA. It utilizes a SC-70-6 package.

Feature Summary

• Bidirectional current sensing capability allows detection of current flow in both directions by offsetting the output voltage via the REF pin.
• Integrated matched resistor gain network minimizes gain error and reduces temperature drift for high precision.
• Wide common-mode input range enables operation in both high-side and low-side configurations without restriction from the power-supply voltage.

Applications

• Motor control
• Battery monitors and balancers
• Power management
• Lighting control

Procurement Notes

Verify that the specific part number suffix matches the required package type (SC-70-6) and automotive grade (Q1). Confirm that the gain option corresponds to the 'A2' designation for 50 V/V. Ensure compatibility with the target system's common-mode voltage limits and supply voltage requirements before procurement.

Selection Notes

Select this component when a single-channel, bidirectional current sense amplifier with a fixed gain of 50 V/V is required. It is suitable for designs needing a 210 kHz bandwidth and operation within a -0.2V to 26V common-mode range. Consider the SC-70-6 package size constraints and the 260 µA maximum quiescent current limit during system power budgeting.

Part Context

This device belongs to the INAx181-Q1 family of automotive-grade current-sense amplifiers. The family includes single-channel (INA181), dual-channel (INA2181), and quad-channel (INA4181) variants. All devices share similar electrical characteristics but differ in channel count and package options, such as SOT-23 or TSSOP.

Replacement Considerations

Other members of the INA181-Q1 family may serve as alternatives if different channel counts or gain settings are acceptable. Verify package compatibility and ensure that the replacement device meets the same AEC-Q100 qualification and thermal specifications.

FAQ

Can the INA181A2QDCKRQ1 be used for high-side current sensing?

Yes, the device supports both high-side and low-side current sensing due to its wide common-mode voltage range of -0.2V to 26V.

What is the fixed gain of the INA181A2QDCKRQ1?

The INA181A2QDCKRQ1 has a fixed internal gain of 50 V/V.