INA186A3IDDFR

Overview

The INA186A3IDDFR is a unidirectional current sense amplifier from Texas Instruments, featuring a fixed gain of 100 V/V. It operates within a supply voltage range of 1.7 V to 5.5 V and supports common-mode voltages from -200 mV to 40 V. Key electrical specifications include a maximum input offset voltage of 3 µV, an input bias current of 500 pA, and a gain error of 0.04%. The device exhibits a gain-bandwidth product of 35 kHz, a typical power supply current of 65 µA, and an input voltage noise density of 75 nV/√Hz. It is housed in an 8-pin SOT-23-THIN package.

Feature Summary

• Provides high-precision measurement with a fixed internal gain of 100 V/V for simplified circuit design.
• Supports bidirectional sensing capabilities despite unidirectional output configuration, handling negative common-mode voltages down to -200 mV.
• Features ultra-low input bias current of 500 pA to minimize measurement errors on high-impedance shunts.
• Operates efficiently with low quiescent current consumption suitable for battery-powered applications.

Applications

• High-side current monitoring in industrial control systems
• Battery management systems requiring precise charge/discharge tracking
• Overcurrent protection circuits in portable electronic devices

Procurement Notes

Verify the specific suffix IDDFR confirms the 8-pin SOT-23-THIN package and 100 V/V gain variant. Ensure compatibility with the target PCB footprint and thermal requirements. Confirm RoHS compliance status through official manufacturer documentation before integration into regulated products.

Selection Notes

Select this component when a fixed 100 V/V gain is required for high-side current sensing. It is suitable for applications needing low quiescent current and operation with common-mode voltages extending below ground. Compare against other INA186 variants if different gain factors or packaging options are necessary for the specific design constraints.

Part Context

This part belongs to the INA186 series of precision current sense amplifiers designed for high-side measurements. The series offers various gain options and packaging styles to accommodate different space and accuracy requirements in modern electronic systems.

Replacement Considerations

Check for direct pin-compatible alternatives within the INA186 family, such as INA186A2IDDFR (50 V/V) or INA186A4IDDFR (200 V/V), ensuring the gain matches the application needs. Verify that any substitute maintains the same SOT-23-THIN package and electrical characteristics.