ACS71020KMABTR-030B3-SPI

Overview

The ACS71020KMABTR-030B3-SPI is a single-phase, isolated power monitoring IC from Allegro MicroSystems. It integrates high-side current sensing and voltage measurement capabilities within a 16-SOIC package. The device operates on a 5V supply with a maximum supply current of 12mA. It features an SPI digital interface for data communication. Key electrical parameters include a supply voltage range of 2.97V to 3.63V (nominal 5V), an operating temperature range of -40°C to +125°C, and AEC-Q100 automotive qualification. The sensor provides bidirectional current measurement with specified accuracy and linearity metrics suitable for precision power management applications.

Feature Summary

• Integrated high-side current sensing and voltage measurement for single-phase AC/DC switching power supplies
• Digital SPI interface for direct microcontroller connectivity without external analog-to-digital conversion
• Automotive-grade reliability with AEC-Q100 qualification and extended temperature operation
• Isolated signal path providing galvanic isolation between the high-voltage sense node and low-voltage logic

Applications

• AC/DC switching power supply controllers
• PMIC power monitoring in automotive systems
• Single-phase energy metering
• Battery management system current monitoring

Procurement Notes

Verify the specific suffix 'SPI' confirms the serial peripheral interface variant, as other suffixes may indicate I2C or analog outputs. Confirm the '-S' suffix denotes the specific tape-and-reel packaging configuration required for automated assembly. Ensure the design supports the 16-SOIC thermal dissipation requirements given the +125°C maximum junction temperature rating. Cross-reference the latest datasheet revision to confirm pinout compatibility with existing PCB layouts.

Selection Notes

Select this component when a digital output is preferred over analog voltage signals to simplify firmware processing. The integrated isolation reduces the need for external isolators, lowering bill-of-materials count. Consider the 16-SOIC footprint constraints against available board space. Verify that the system's microcontroller supports the required SPI clock speeds and protocol modes defined in the electrical characteristics section of the datasheet.

Part Context

This part belongs to the ACS71020 family of power monitoring ICs designed for high-precision current and voltage measurement. Unlike basic Hall-effect sensors, this series integrates signal conditioning and digital interfaces directly on-chip. It serves as a drop-in replacement for discrete sensing solutions in compact power electronics, offering improved accuracy and reduced component count for modern embedded power management designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Allegro MicroSystems for current alternatives such as the ACS37800 series if the ACS71020 is marked as 'Not Recommended for New Designs'.