INA186A4IDDFR

Overview

The INA186A4IDDFR is a single-channel, bidirectional current sense amplifier from Texas Instruments. It operates with a supply voltage range of 1.7 V to 5.5 V and supports common-mode voltages from -200 mV to 40 V. The device features a fixed gain of 200 V/V, a gain-bandwidth product of 33 kHz, and a maximum input offset voltage of 3 µV. Key electrical specifications include a typical power supply current of 90 µA, an input bias current of 500 pA, and a CMRR of 150 dB. It functions within a temperature range of -40°C to +125°C and is housed in an SOT-23-8 package.

Feature Summary

• Provides high-precision bidirectional current sensing with a fixed internal gain of 200 V/V.
• Supports negative common-mode voltages down to -200 mV for low-side or mixed-sense applications.
• Delivers ultra-low input bias current and minimal input offset voltage for enhanced measurement accuracy.
• Operates on a single low-voltage supply while maintaining high common-mode rejection.

Applications

• Battery management systems requiring precise current monitoring
• Low-side current sensing in portable electronic devices
• Overcurrent protection circuits in industrial control systems
• Power supply output current regulation

Procurement Notes

Verify the specific suffix IDDFR confirms the SOT-23-8 package and tape-and-reel shipping configuration. Ensure the A2 grade designation matches the required offset voltage and gain error tolerances for your design. Confirm RoHS compliance status if restricted materials are prohibited in your manufacturing process. Cross-reference the datasheet revision date to ensure compatibility with your schematic symbols.

Selection Notes

Select this component when a fixed 200 V/V gain is optimal for the signal chain. The -200 mV to 40 V common-mode range allows flexibility in both high-side and low-side configurations. Consider the 90 µA quiescent current for battery-powered applications where power efficiency is critical. Verify that the SOT-23-8 footprint fits the available PCB space compared to larger packages like DSBGA.

Part Context

This part belongs to the INA186 family of zero-drift current sense amplifiers designed for high-accuracy measurements. Unlike higher-voltage variants such as the INA241, the INA186 series is optimized for lower common-mode voltages up to 40 V. The IDDFR suffix specifically denotes the industry-standard SOT-23-8 surface-mount package, distinguishing it from other form factors like DSBGA or SC-70.

Replacement Considerations

Direct pin-to-pin replacements within the same family include INA186A1IDDFR (Gain 50 V/V), INA186A3IDDFR (Gain 100 V/V), and INA186A5IDDFR (Gain 500 V/V). For different package requirements, verify thermal and mechanical constraints before substituting with DSBGA variants.