INA2191A2IYBJR

Overview

The INA2191A2IYBJR is a dual-channel, bidirectional current sense amplifier from Texas Instruments. It features a gain of 50 V/V and operates with a supply voltage between 1.7 V and 5.5 V. The device supports common-mode voltages from -0.2 V to 40 V. Key electrical specifications include a maximum gain error of ±0.25%, an input offset voltage of ±12 µV, and a typical input bias current of 3 nA. It utilizes a DSBGA-12 package.

Feature Summary

• Dual-channel architecture with independent enable pins for each channel
• Bidirectional sensing capability using external reference voltages
• Ultra-low input bias current enabling microamp-level measurement accuracy
• Zero-drift architecture providing high precision across temperature ranges

Applications

• Notebook computers
• Cell phones
• Battery-powered devices
• Telecom equipment
• Power management systems

Procurement Notes

Verify the specific suffix IYBJR against the manufacturer's official package option addendum to confirm the DSBGA-12 physical dimensions and pinout configuration. Ensure that the A2 designation corresponds to the required 50 V/V gain setting for your circuit design. Cross-reference the datasheet revision history to confirm production data status and any recent parameter updates.

Selection Notes

Select this component when bidirectional current monitoring is required in space-constrained designs. The dual-channel configuration allows simultaneous monitoring of two separate power rails within a single small footprint. The low quiescent current makes it suitable for battery-operated applications where power efficiency is critical. Verify that the system's common-mode voltage remains within the specified -0.2 V to 40 V range.

Part Context

This device belongs to the INAx191 family of ultra-precise current sense amplifiers. While the single-channel INA191 variant uses a smaller DSBGA-6 package, the INA2191 provides dual channels in a DSBGA-12 package. Both variants share similar electrical characteristics, including low bias currents and wide common-mode voltage capabilities, but differ in channel count and physical size.

Replacement Considerations

Direct substitutes within the same family include the INA2191A1IYBJR (25 V/V gain), INA2191A3IYBJR (100 V/V gain), INA2191A4IYBJR (200 V/V gain), and INA2191A5IYBJR (500 V/V gain). Single-channel alternatives are available as the INA191 series with identical gain options.