INA2191A5IYBJR

Overview

The INA2191A5IYBJR is a dual-channel, bidirectional current-sense amplifier from Texas Instruments. It operates with a supply voltage of 1.7 V to 5.5 V and supports common-mode voltages from -0.2 V to +40 V. The device features a fixed gain of 500 V/V, a maximum gain error of ±0.25%, and a typical input bias current of 3 nA. It utilizes a DSBGA-12 package and includes independent enable pins for each channel.

Feature Summary

• Dual-channel architecture with independent digital enable control for power management
• Bidirectional sensing capability using external reference voltage inputs
• Ultra-low input bias current enabling microamp-level measurement accuracy
• Zero-drift architecture providing high precision with minimal offset voltage

Applications

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

Procurement Notes

Verify the specific ordering suffix IYBJR corresponds to the DSBGA-12 package variant. Confirm that the A5 designation matches the required 500 V/V gain setting for your circuit design. Ensure the component meets RoHS compliance requirements for your manufacturing process.

Selection Notes

Select this component when bidirectional current monitoring is required in space-constrained designs. The 500 V/V gain is suitable for applications involving very small shunt resistors or low-voltage signals. Verify that the system can accommodate the necessary reference voltage inputs for bidirectional operation.

Part Context

This part belongs to the INAx191 family of ultra-precise current sense amplifiers. It shares architectural similarities with the single-channel INA191 but provides two channels in a larger footprint. The family is designed for high-side and low-side sensing applications requiring low power consumption and high accuracy.

Replacement Considerations

Direct substitutes within the same family include other gain variants such as INA2191A1IYBJR, INA2191A2IYBJR, INA2191A3IYBJR, and INA2191A4IYBJR. These parts share identical pinouts and packages but offer different fixed gains ranging from 25 V/V to 200 V/V.