INA237AQDGSRQ1

Power Supply Controllers, Monitors Overview

The INA237AQDGSRQ1 is an automotive-grade current sense amplifier manufactured by Texas Instruments. It features a 16-bit I2C digital output for direct microcontroller interfacing. The device supports a common-mode voltage range of -300 mV to 85 V with a gain bandwidth product of 10 kHz. Key electrical specifications include a maximum input offset voltage of 15 uV, input bias current of 100 pA, and a common-mode rejection ratio of 120 dB. It operates on a supply voltage between 2.7 V and 5.5 V, consuming 640 uA. Gain error is specified at 0.3%, and it functions within a temperature range of -40°C to +125°C in a VSSOP-10 package.

Power Supply Controllers, Monitors Feature Summary

• Provides high-precision current sensing via a 16-bit I2C digital interface, eliminating the need for external ADCs.
• Supports high-side and low-side measurements with a wide common-mode voltage range up to 85 V.
• Features ultra-low input offset voltage and bias current for accurate measurement of small differential signals.

Power Supply Controllers, Monitors Applications

• Automotive battery management systems
• Motor control circuits
• Power distribution units

Power Supply Controllers, Monitors Procurement Notes

Verify that the specific part number includes the 'Q1' suffix to confirm AEC-Q100 automotive qualification status. Ensure compatibility with the target system's I2C bus voltage levels and timing requirements. Confirm that the VSSOP-10 package dimensions align with the PCB footprint design. Check for any specific ordering suffixes that may indicate tape-and-reel quantities or moisture sensitivity levels.

Power Supply Controllers, Monitors Selection Notes

Select this component when a digital output is required to simplify system architecture by removing external analog-to-digital converters. It is suitable for applications demanding high accuracy in harsh automotive environments due to its low offset voltage and wide common-mode range. Consider the 10 kHz bandwidth limitation for high-speed switching applications where faster response times are necessary.

Power Supply Controllers, Monitors Part Context

This device belongs to the INA237 family of current sense amplifiers designed for precision monitoring. The 'Q1' designation indicates compliance with automotive reliability standards. It integrates signal conditioning and digitization into a single compact package, offering a solution for space-constrained designs requiring robust performance in vehicle electronics.

Power Supply Controllers, Monitors Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.