INA228AQDGSRQ1

Power Supply Controllers, Monitors Overview

The INA228AQDGSRQ1 is an AEC-Q100 qualified, ultra-precise digital power monitor designed for automotive current-sensing applications. It features a 20-bit delta-sigma ADC and supports high-side or low-side shunt sensing with input voltages ranging from -0.3V to 85V. The device operates on a single supply voltage between 2.7V and 5.5V, consuming 640µA of quiescent current. It provides 0.5% accuracy across the operating temperature range of -40°C to +125°C. Communication is handled via an I2C interface, and it is housed in a VSSOP-10 package.

Power Supply Controllers, Monitors Feature Summary

• Ultra-precise 20-bit delta-sigma analog-to-digital conversion for high-resolution measurements
• Automotive qualification compliant with AEC-Q100 standards for reliability
• Supports both high-side and low-side shunt resistor configurations
• Integrated I2C interface for digital data transmission

Power Supply Controllers, Monitors Applications

• Battery Management Systems (BMS) in hybrid electric vehicles
• Battery Management Systems (BMS) in electric vehicles
• High-voltage current monitoring in automotive power distribution
• Precision energy and charge monitoring in automotive electronics

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'DGSR' confirms the VSSOP-10 package and tape-and-reel shipping format. Confirm AEC-Q100 qualification status is required for your automotive application. Check for moisture sensitivity labeling as the component is humidity-sensitive. Ensure the I2C address configuration meets system requirements. Validate that the 85V common-mode voltage range aligns with your shunt circuit design.

Power Supply Controllers, Monitors Selection Notes

Select this component when high precision and automotive reliability are required for high-voltage current sensing. The 20-bit resolution suits applications demanding detailed energy tracking. Consider the VSSOP-10 package size for space-constrained PCB layouts. Verify compatibility with the system's I2C bus speed and voltage levels. Evaluate the 640µA quiescent current against battery drain constraints in standby modes.

Power Supply Controllers, Monitors Part Context

This part belongs to the Texas Instruments INA229/INA228 family of digital power monitors. It shares architectural similarities with the INA229 but offers specific automotive-grade qualification. The device complements other sensor interfaces like the PGA308 in complex automotive measurement systems. It serves as a direct replacement for previous generation analog monitors requiring higher resolution.

Power Supply Controllers, Monitors Replacement Considerations

Direct pin-compatible substitutes within the same family include the INA229AQDGSRQ1. Verify functional equivalence regarding accuracy and voltage ranges before substitution. Cross-reference datasheets for any differences in register maps or calibration procedures. Ensure the alternative part maintains AEC-Q100 compliance if used in automotive contexts.