INA201AQDGKRQ1

Overview

The INA201AQDGKRQ1 is an automotive-grade high-side current shunt monitor from Texas Instruments, designed for robust industrial and vehicle applications. It operates with a supply voltage range of 2.7 V to 18 V and supports input common-mode voltages from -0.3 V to 80 V. The device provides a fixed gain of 50 V/V with a typical accuracy of ±3.5% over the specified temperature range. Key electrical parameters include a maximum quiescent current of 1.85 mA, a bandwidth of approximately 400 kHz, and an input offset voltage of 1 mV. It features an open-drain comparator output and includes an internal reference.

Feature Summary

• High-side current sensing capability supporting negative common-mode voltages
• Integrated open-drain comparator for overcurrent event detection
• Internal precision reference voltage for external circuit biasing
• Automotive qualification compliant with AEC-Q100 standards

Applications

• Automotive battery monitoring systems
• Industrial motor control current feedback
• Overcurrent protection circuits in power distribution units
• Battery management system (BMS) cell balancing monitors

Procurement Notes

Verify the specific suffix 'A' indicates the commercial/industrial temperature grade variant within the automotive-qualified family. Confirm the 'DGK' package code corresponds to the VSSOP-8 form factor required for your PCB layout. Ensure the 'RQ1' designation matches the reel packaging specification needed for your assembly line equipment. Cross-reference the manufacturer part number against the latest datasheet revision to confirm pinout compatibility.

Selection Notes

Select this component when high-side measurement is required with support for negative common-mode voltages. The fixed 50 V/V gain suits applications where moderate amplification is sufficient without external resistors. Consider the ±3.5% accuracy limit for cost-sensitive designs where higher precision is not mandatory. The integrated comparator simplifies design by removing the need for external threshold detection components.

Part Context

This device belongs to the INA20x-Q1 family of high-side current monitors. It shares architectural similarities with the INA200 and INA202 but offers distinct gain and feature combinations tailored for specific automotive and industrial needs. The Q1 suffix denotes compliance with automotive reliability standards, distinguishing it from non-automotive counterparts in the broader INA20x series.

Replacement Considerations

INA200AQDGKRQ1: Similar high-side monitor but with different gain characteristics and comparator configuration. INA202AQDGKRQ1: Offers adjustable gain via external resistors instead of fixed gain. Verify that any substitute maintains the same VSSOP-8 footprint and AEC-Q100 qualification level for direct replacement in automotive assemblies.