INA186A2IDDFR

Overview

The INA186A2IDDFR is a precision current sense amplifier from Texas Instruments, featuring a fixed gain of 50 V/V. It operates with a supply voltage range of 1.7 V to 5.5 V and supports bidirectional current sensing within a common-mode voltage window of -200 mV to 40 V. Key electrical specifications include a maximum input offset voltage of 3 µV, a gain error of 0.04%, and a quiescent current of 90 µA. The device offers a 3 dB bandwidth of 37 kHz and a slew rate of 0.3 V/µs. It is housed in a DSBGA-6 package and functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Provides high-precision bidirectional current monitoring with a fixed internal gain of 50 V/V.
• Features ultra-low input offset voltage and low bias current for minimal measurement error.
• Supports wide common-mode voltage operation ranging from slightly below ground up to 40 V.
• Delivers stable performance with high common-mode rejection ratio across the full industrial temperature range.

Applications

• Battery management systems requiring precise cell-level current monitoring
• Industrial process control loops with low-side or high-side current sensing needs
• Power supply output current regulation and protection circuits

Procurement Notes

Verify the specific suffix IDDFR corresponds to the DSBGA-6 package and tape-and-reel delivery format. Confirm that the A2 variant matches the required 50 V/V gain specification for your circuit design. Ensure compatibility with the -40°C to +125°C operating temperature range for your intended application environment. Cross-reference the manufacturer part number against official distributor catalogs to confirm availability and authenticity.

Selection Notes

Select this component when a fixed 50 V/V gain is optimal for interfacing with ADCs or microcontrollers. Consider the DSBGA-6 footprint constraints during PCB layout planning. Evaluate the 37 kHz bandwidth against signal frequency requirements to ensure adequate response time without excessive noise. Compare the 90 µA quiescent current against power budget limitations in battery-operated devices.

Part Context

This device belongs to the INA186 family of zero-drift current sense amplifiers designed for high-accuracy applications. It complements other variants like the INA186A1 and INA186A3, which offer different fixed gains. The series is engineered to replace discrete resistor networks, reducing board space and improving thermal tracking accuracy compared to traditional shunt monitor solutions.

Replacement Considerations

Direct pin-compatible substitutes within the same family include INA186A1IDDFR (Gain 20 V/V) and INA186A3IDDFR (Gain 100 V/V). For automotive applications, consider the qualified INA186A2QDBVRQ1, noting its SOT-23-5 package differs from the DSBGA-6 form factor.