INA186A1IDDFR

Overview

The INA186A1IDDFR 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 10 V/V, a gain bandwidth product of 37 kHz, and a typical input offset voltage of 3 µV. Key electrical specifications include an input bias current of 500 pA, a power supply current of 90 µA, and a CMRR of 150 dB. It is housed in an SOT-23-8 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Provides high-precision bidirectional current sensing with ultra-low input bias current for minimal signal degradation.
• Delivers exceptional common-mode rejection ratio to maintain accuracy in noisy environments.
• Operates efficiently at low supply voltages with microampere-level quiescent current consumption.

Applications

• Battery management systems requiring precise charge/discharge monitoring
• Industrial process control loops with ground-referenced loads
• Overcurrent protection circuits in portable electronic devices

Procurement Notes

Verify the specific suffix IDDFR confirms the SOT-23-8 package and tape-and-reel delivery format. Confirm the A-grade designation matches required offset voltage tolerances. Ensure the manufacturer part number aligns with the intended PCB footprint and reflow soldering profile. Cross-reference the datasheet revision date to validate parameter consistency against design requirements.

Selection Notes

Select this component when a fixed 10 V/V gain suits the signal conditioning needs. The SOT-23-8 package offers a compact solution for space-constrained designs. Consider the 37 kHz bandwidth limit for applications not requiring high-frequency response. The low quiescent current makes it suitable for battery-powered systems where efficiency is critical.

Part Context

This device belongs to the INA186 family of zero-drift current sense amplifiers. The series is characterized by chopper stabilization technology that minimizes offset voltage drift over temperature. The INA186A1 variant specifically provides a fixed gain of 10 V/V, distinguishing it from other gain options within the same product line.

FAQ

What is the maximum common-mode voltage supported?

The INA186A1IDDFR supports common-mode voltages ranging from -200 mV to 40 V.

Does the device support bidirectional current flow?

Yes, the amplifier is designed for bidirectional current sensing, allowing detection of both positive and negative currents relative to the reference.