INA191A3IYFDR

Overview

The INA191A3IYFDR 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 100 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 a quiescent current of 43µA (typical). It is housed in a DSBGA-6 package and rated for operation between -40°C and +125°C.

Feature Summary

• Zero-drift architecture minimizes offset voltage drift to extend dynamic range
• Low input bias current enables precise measurement using larger sense resistors
• Wide common-mode voltage range allows high-side or low-side monitoring

Applications

• Overcurrent protection circuits
• Precision current measurement systems
• Closed-loop feedback control applications

Procurement Notes

Verify the specific suffix 'IYFDR' corresponds to the DSBGA-6 package and tape-and-reel orientation. Confirm that the A3 designation matches the required 100 V/V gain for your circuit design. Ensure compatibility with the specified -40°C to +125°C operating temperature range for your environment.

Selection Notes

Select this component when a fixed 100 V/V gain is required for bidirectional current sensing. It is suitable for designs needing low static power consumption and high precision without external trimming. Consider the DSBGA-6 footprint constraints and the wide common-mode voltage capability relative to other family members.

Part Context

This part belongs to the INA191 series of current shunt monitors. It shares the zero-drift technology and low-power characteristics of the family but is distinguished by its fixed 100 V/V gain configuration. The series offers various gain options to suit different signal conditioning requirements while maintaining high accuracy.

Replacement Considerations

Other INA191 variants with different gain suffixes (e.g., A2 for 50 V/V, A4 for 200 V/V) may serve as functional substitutes if gain adjustments are permissible. Verify pinout and package compatibility before substitution.