INA191A1IYFDR

Overview

The INA191A1IYFDR 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 consumes a maximum of 65µA when enabled. The device features a fixed gain of 25V/V (INA191A1) and supports bidirectional current sensing with a common-mode voltage range of –0.2V to +40V, independent of the supply voltage. It utilizes a zero-drift architecture with a maximum offset voltage of ±12µV and a maximum gain error of ±0.25%. The component is rated for operation between -40°C and +125°C and is housed in a DSBGA-6 package.

Feature Summary

• Zero-drift architecture minimizes offset voltage drift to extend dynamic range for precise measurements
• Wide common-mode voltage range allows detection across high-side or low-side configurations
• Low quiescent current consumption supports battery-powered applications
• Fixed gain options eliminate external resistor requirements for simplified design

Applications

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

Procurement Notes

Verify the specific suffix 'A1' confirms the 25V/V gain setting required for the application. Ensure the DSBGA-6 package footprint matches the PCB layout constraints. Confirm RoHS compliance status if environmental regulations apply. Check for any specific tape-and-reel specifications if automated assembly is planned. Validate that the operating temperature range meets the system's thermal requirements.

Selection Notes

Select this component when a fixed gain of 25V/V is sufficient for the signal conditioning needs. Consider the zero-drift technology if long-term stability and minimal calibration are priorities over speed. Evaluate the trade-off between the low power consumption and the bandwidth limitations inherent to chopper-stabilized amplifiers. Ensure the common-mode voltage does not exceed the specified limits during fault conditions.

Part Context

This part belongs to the INA191 family of current shunt monitors designed for precision monitoring tasks. The family offers various gain options to accommodate different signal levels while maintaining low power consumption. The INA191 series is engineered for applications requiring high accuracy in harsh environments, leveraging advanced analog design techniques to achieve low noise and drift characteristics within a compact form factor.

Replacement Considerations

Direct substitutes include other INA191 variants with different gain settings, such as INA191A2 (50V/V), INA191A3 (100V/V), INA191A4 (200V/V), and INA191A5 (500V/V). These parts share identical pinouts and electrical characteristics except for the internal gain configuration.