INA190A4IDCKR

Overview

The INA190A4IDCKR is a bidirectional current sense amplifier from Texas Instruments, designed for high-precision applications. It operates with a supply voltage range of 1.7 V to 5.5 V and supports common-mode voltages from -200 mV to 40 V. The device features a fixed gain of 200 V/V, a gain error of -0.06%, and an input offset voltage of -3 µV. Key electrical specifications include a gain-bandwidth product of 33 kHz, a common-mode rejection ratio of 150 dB, and an input bias current of 500 pA. It consumes 65 µA of operating supply current and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Bidirectional sensing capability allows detection of current flow in both directions across the shunt resistor.
• Ultra-low input bias current minimizes measurement errors when monitoring low-current signals.
• High common-mode rejection ratio ensures accurate signal extraction despite significant common-mode voltage variations.

Applications

• Battery management systems requiring precise bidirectional current monitoring
• Industrial process control loops with high-side or low-side current sensing
• Overcurrent protection circuits in portable electronic devices

Procurement Notes

Verify the specific suffix IDCKR corresponds to the SC-70-6 package variant. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure design compatibility with the specified 1.7 V to 5.5 V supply range and thermal operating limits. Cross-reference datasheet revisions to validate pinout and electrical characteristics against current production versions.

Selection Notes

Select this component when bidirectional current measurement is required alongside ultra-low offset voltage specifications. The 200 V/V gain suits applications needing moderate amplification without external resistors. Consider the SC-70-6 package for space-constrained designs. Evaluate the 65 µA quiescent current against battery life requirements for portable equipment.

Part Context

This part belongs to the INA190 family of zero-drift current sense amplifiers. The series emphasizes precision and low power consumption for modern embedded systems. The A4 designation typically indicates a specific gain setting within the lineup. The IDCKR suffix defines the commercial temperature grade and surface-mount packaging configuration.

Replacement Considerations

INA190A4IDCKRG4: Same functional specifications with tape-and-reel packaging instead of cut tape.