INA185A2IDRLT

Overview

The INA185A2IDRLT is a bidirectional current sense amplifier from Texas Instruments, designed for cost-sensitive and space-constrained applications. It operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device features a fixed gain of 50 V/V, enabling precise measurement of voltage drops across shunt resistors. It supports a common-mode voltage range from -0.2 V to +26 V, independent of the supply voltage. Key electrical specifications include a maximum gain error of 0.05%, an input offset voltage of 25 µV, and a bandwidth of 210 kHz. The package is SC-70-6.

Feature Summary

• Bidirectional current sensing capability allows detection of current flow in both directions.
• Integrated matched resistor network minimizes gain error and temperature drift.
• Low quiescent current consumption suitable for battery-powered systems.
• High-speed operation with wide bandwidth for dynamic load monitoring.

Applications

• Motor control systems
• Battery monitoring circuits
• Power management units
• Overcurrent protection detection

Procurement Notes

Verify the specific suffix IDRLT corresponds to the tape-and-reel packaging format as indicated by standard TI naming conventions. Confirm the A2 grade accuracy requirements match the application's precision needs. Ensure the SC-70-6 footprint aligns with the PCB layout constraints. Check RoHS compliance status through official manufacturer documentation before finalizing procurement.

Selection Notes

Select this component when a compact solution is required for bidirectional current monitoring. The 50 V/V gain is optimal for detecting small voltage drops while maintaining signal integrity. Consider the 210 kHz bandwidth for applications requiring faster response times than lower-bandwidth alternatives. The low power consumption makes it suitable for portable devices where energy efficiency is critical.

Part Context

This part belongs to the INA185 family of ultra-small, high-speed current sense amplifiers. It shares architectural similarities with other members like the INA185A1 and INA185A3 but differs in fixed gain settings. The family is designed to replace discrete solutions in space-limited designs, offering integrated precision resistors for improved performance over external resistor networks.

Replacement Considerations

Direct substitutes within the same family include INA185A1IDRLT (20 V/V gain) and INA185A3IDRLT (100 V/V gain). Verify that the gain difference does not impact the system's dynamic range. Other packages such as DCKR may require footprint adaptation. Cross-reference datasheets for thermal and electrical parameter compatibility.