INA185A3IDRLT

Overview

The INA185A3IDRLT is a precision, high-speed current sense amplifier from Texas Instruments. It features a bidirectional architecture and low-side capability within an ultra-small SOT-563 package. Key electrical parameters include a maximum gain error of 0.2%, a minimum common-mode rejection ratio (CMRR) of 96 dB, and a maximum input offset voltage of 55 uV. The device operates with a supply voltage range of 2.7 V to 5.5 V and draws a maximum quiescent current of 0.3 mA. It supports gains of 100, 20, 200, and 50 V/V, with bandwidths ranging from 105 kHz to 350 kHz depending on the selected gain. The operating temperature range extends from -40°C to 125°C.

Feature Summary

• Bidirectional current sensing capability allows detection of current flow in both directions.
• Low-side capable design enables direct connection to ground-referenced shunt resistors.
• Ultra-small SOT-563 packaging facilitates space-constrained board layouts.

Applications

• Battery management systems
• Load switch control circuits
• Overcurrent protection designs

Procurement Notes

Verify the specific suffix IDRLT corresponds to the tape-and-reel packaging variant rather than the cut-tape IDRLR version. Confirm the A3 grade designation matches the required gain accuracy specifications for your application. Ensure the SOT-563 footprint aligns with your PCB assembly capabilities. Cross-reference the manufacturer's latest datasheet revision to confirm pinout consistency and thermal characteristics before finalizing procurement orders.

Selection Notes

Select this component when bidirectional sensing is required in a minimal footprint. The A3 grade offers a balance of precision and speed suitable for general-purpose applications. Consider the available gain options against the expected signal amplitude. Evaluate the 350 kHz bandwidth requirement against noise filtering needs. Verify that the 2.7 V minimum supply voltage meets system power constraints.

Part Context

This part belongs to the INA185 family of current sense amplifiers designed for high-precision measurements. The family includes variants with different packages and grades. The IDRLT suffix indicates a reel-based packaging format. It shares architectural similarities with other TI current sense amplifiers but distinguishes itself through its specific combination of bidirectional operation and small form factor.

Replacement Considerations

INA185A3IDRLR is a verified substitute offering identical electrical performance in a compatible tape-and-reel format. Check for minor differences in reel quantity or handling requirements between the LT and R suffixes.