INA185A3IDCKR

Overview

The INA185A3IDCKR is a bidirectional, high-precision current sense amplifier from Texas Instruments. It features a fixed gain of 100 V/V and operates with a supply voltage range of 2.7 V to 5.5 V. The device supports a common-mode input voltage range from -0.2 V to +26 V. Key electrical specifications include a maximum offset voltage of ±55 µV at 0 V common-mode and ±130 µV at 12 V common-mode. It offers a bandwidth of 150 kHz and a slew rate of 2 V/µs. The quiescent current is typically 200 µA, with a maximum of 300 µA across the operating temperature range of -40°C to +125°C.

Feature Summary

• Bidirectional current sensing capability for monitoring charge and discharge cycles
• Integrated matched resistor network ensures low gain error and reduced temperature drift
• Wide common-mode voltage range independent of the single power supply voltage
• Rail-to-rail output swing allows linear operation close to supply rails

Applications

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

Procurement Notes

Verify the specific suffix IDCKR corresponds to the SC-70-6 package variant when sourcing. Confirm that the A3 designation matches the required 100 V/V gain for the design. Ensure the component meets RoHS compliance requirements for the target assembly process. Cross-reference the datasheet revision date to ensure all electrical characteristics align with the latest production data.

Selection Notes

Select this part when a fixed 100 V/V gain is required for bidirectional current monitoring. The SC-70-6 package provides space efficiency compared to larger footprints. Consider the 150 kHz bandwidth for applications requiring moderate response speeds. Verify that the 26 V common-mode limit accommodates the highest bus voltage in the system without exceeding absolute maximum ratings.

Part Context

This component belongs to the INA185 family of high-precision current sense amplifiers. The series includes variants with different gains (A1: 20 V/V, A2: 50 V/V, A3: 100 V/V, A4: 200 V/V) and packages (SC-70 and SOT-563). The INA185 is designed for cost-sensitive, space-constrained applications requiring accurate current measurement on both high-side and low-side configurations.

Replacement Considerations

INA185A3IDCKT is the tape-and-reel version of the same device in the SC-70-6 package.