INA190A2IDDFR

Overview

The INA190A2IDDFR is a unidirectional current shunt monitor manufactured by 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, independent of the supply voltage. The device features a fixed gain of 50 V/V, a typical input bias current of 500 pA, and an input offset voltage of -3 µV. It exhibits a gain bandwidth product of 37 kHz and a common-mode rejection ratio of 150 dB. Power consumption is characterized by a typical operating current of 65 µA. The component functions within an extended temperature range of -40°C to +125°C and is housed in an SOT-23-8 package.

Feature Summary

• Provides precise bidirectional current sensing capability across a wide common-mode voltage range up to 40 V.
• Utilizes a zero-drift architecture to maintain low input offset voltage and minimize drift over temperature variations.
• Enables microamp-level measurement accuracy through exceptionally low input bias current specifications.

Applications

• Battery management systems in portable electronics
• Overcurrent protection circuits in power distribution networks
• Current monitoring in industrial process control equipment

Procurement Notes

Verify the specific suffix IDDFR confirms the SOT-23-8 package and reel packaging configuration. Ensure the A2 designation matches the required 50 V/V gain for your circuit design. Confirm RoHS compliance status and lead times directly with authorized distributors or Texas Instruments prior to ordering.

Selection Notes

Select this component when high precision is required for low-side or high-side current sensing applications. The 50 V/V gain suits scenarios where moderate signal amplification is needed without excessive output swing limitations. Consider the SOT-23-8 footprint for space-constrained designs requiring surface-mount integration.

Part Context

This device belongs to the INA190 family of ultra-precise current sense amplifiers. The family offers multiple gain options including 25, 100, 200, and 500 V/V variants. The INA190 series is designed for applications demanding high accuracy and low power consumption in battery-operated and industrial environments.

FAQ

Is the INA190A2IDDFR bidirectional?

Yes, the datasheet describes the INA190 series as capable of bidirectional current sensing, although the A2 variant specifically provides a positive output proportional to the sensed current.

What is the maximum common-mode voltage supported?

The device supports a common-mode voltage range from -200 mV to 40 V, independent of the supply voltage.