INA2181A4IDSQR

Overview

The INA2181A4IDSQR is a dual-channel, bidirectional current-sense amplifier from the INAx181 family. It features a fixed gain of 200 V/V and supports common-mode voltages from -0.2 V to +26 V while operating on a single 2.7-V to 5.5-V supply. The device offers a bandwidth of 105 kHz and a slew rate of 2 V/µs. Key electrical characteristics include a maximum offset voltage of ±500 µV at 12 V common-mode, a gain error of ±1%, and a quiescent current of 500 µA. It operates within an extended temperature range of -40°C to +125°C.

Feature Summary

• Bidirectional sensing capability for monitoring current flow in both directions across sense resistors.
• Integrated matched resistor network providing fixed gain options with minimized gain error and reduced temperature drift.
• Wide common-mode input range independent of the power-supply voltage, enabling high-side and low-side configurations.

Applications

• Motor control systems
• Battery monitors and balancers
• Power management circuits
• Lighting control applications
• Solar inverters

Procurement Notes

Verify the specific package suffix 'DSQR' against the manufacturer's latest orderable part list to confirm availability and exact physical dimensions. Ensure the selected variant matches the required channel count and gain configuration for the design. Cross-reference the datasheet revision history for any updates to electrical specifications or recommended operating conditions before finalizing procurement.

Selection Notes

Select this component when dual-channel precision current monitoring is required within a 26-V common-mode window. The 200 V/V gain option is suitable for detecting small differential voltages across low-value shunt resistors. Consider the 105 kHz bandwidth and 2 V/µs slew rate for applications requiring fast transient response. Verify that the 500 µA quiescent current aligns with system power budget constraints.

Part Context

This device belongs to the INAx181 family of cost-optimized 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. The A4 designation specifically indicates the 200 V/V fixed gain configuration within this product line.

Replacement Considerations

Compatible alternatives within the same family include INA2181A1, INA2181A2, and INA2181A3, which offer different gain settings. Single-channel equivalents are available as INA181 variants. Quad-channel options exist as INA4181 parts. Ensure pin compatibility and gain requirements match when substituting.