INA191A2IYFDR

Overview

The INA191A2IYFDR is a low-power, voltage-output current shunt monitor manufactured by Texas Instruments. It operates on a single supply voltage ranging from 1.7V to 5.5V and features a fixed gain of 50 V/V. The device supports bidirectional current sensing with a common-mode voltage range extending from -0.2V to +40V, independent of the supply voltage. Key electrical specifications include a maximum gain error of 0.25%, an input bias current of 100pA typical, and an input offset voltage of ±12µV maximum. It functions within an industrial temperature range of -40°C to +125°C.

Feature Summary

• Zero-drift architecture minimizes offset voltage drift for extended dynamic range in precision measurements
• Low quiescent current consumption enables efficient power management in battery-operated systems
• Wide common-mode voltage range allows high-side or low-side sensing without level shifting

Applications

• Overcurrent protection circuits
• Precision current measurement for system optimization
• Closed-loop feedback control applications

Procurement Notes

Verify the specific suffix 'IYFDR' corresponds to the DSBGA-6 package and tape-and-reel delivery format. Confirm that the 'A2' designation strictly indicates the 50 V/V fixed gain configuration. Ensure compliance with RoHS directives as specified in the manufacturer's documentation before integration into production assemblies.

Selection Notes

Select this component when precise microampere-level current monitoring is required using larger sense resistors due to low input bias current. The zero-drift technology is critical for applications demanding high accuracy over wide temperature variations. Compare against other INA191 variants if different gain factors such as 25 V/V or 100 V/V are needed.

Part Context

This part belongs to the INA191 family of current shunt monitors designed for low-power applications. Unlike digital interfaces found in other series, this analog output device provides direct voltage proportional to sensed current. It complements higher-channel count devices like the INA2191 by offering a cost-effective solution for single-channel monitoring tasks.

Replacement Considerations

Other gains within the INA191 family (INA191A1, A3, A4, A5) share identical pinouts and functionality but differ in fixed gain values. Verify that the 50 V/V gain meets the system's signal conditioning requirements before substituting with adjacent gain variants.