INA185A3IDRLR

Overview

The INA185A3IDRLR is a precision, high-speed current sense amplifier from Texas Instruments housed in a 6-pin SOT-563 package. It features a gain of 100 V/V, a bandwidth of 350 kHz, and a maximum gain error of 0.2%. The device supports bidirectional sensing with low-side capability, operating within a common mode voltage range of -0.2 V to 26 V. It functions on a supply voltage between 2.7 V and 5.5 V, drawing a maximum quiescent current of 0.3 mA. Key electrical specifications include a minimum CMRR of 96 dB, an input offset voltage of 55 uV max, and operation across a temperature range of -40°C to 125°C.

Feature Summary

• Bi-directional current sensing capability allows for accurate measurement of current flow in both directions.
• Low-side capable design enables flexible integration into ground-referenced shunt configurations.
• High-speed performance with 350 kHz bandwidth supports rapid transient detection in power systems.

Applications

• Battery management systems requiring precise bidirectional current monitoring
• Overcurrent protection circuits in portable electronics
• Load switch control applications

Procurement Notes

Verify the specific suffix IDRLR corresponds to the SOT-563 package and tape-and-reel shipping configuration. Confirm that the A3 designation matches the required 100 V/V fixed gain for your circuit design. Ensure the component meets the -40°C to 125°C operating temperature range specified for industrial or automotive environments. Cross-reference the datasheet revision date to ensure compatibility with your design constraints.

Selection Notes

Select this component when a compact SOT-563 footprint is required alongside high-speed response characteristics. The 100 V/V gain is suitable for detecting small voltage drops across low-value shunt resistors. Consider the 26 V common mode limit; higher voltage applications may require alternative devices from the INA185 family with different voltage ratings. The low quiescent current makes it appropriate for battery-powered designs.

Part Context

This part belongs to the INA185 series of ultra-small current sense amplifiers. The series offers various gain options (20, 50, 100, 200 V/V) and bandwidths tailored for space-constrained applications. The INA185A3 variant specifically provides a fixed gain of 100 V/V, balancing precision and speed for general-purpose current sensing tasks in modern electronic systems.

Replacement Considerations

Other gains in the INA185A series (INA185A2, INA185A4) share the same package and pinout but offer different fixed gains. Verify if the system requires a different amplification factor before substituting. No direct cross-manufacturer equivalents are confirmed in the provided data.