ATM90E36A-AU-R

Overview

The ATM90E36A-AU-R is a multi-phase energy metering integrated circuit from Microchip Technology, part of the AT90 series. It features an ARM Cortex-M0 core and supports multiple communication interfaces including SPI and UART. The device integrates high-precision analog front-end components for voltage and current sensing, enabling accurate measurement of active, reactive, and apparent power in three-phase systems. It operates within a specified voltage range and includes built-in calibration capabilities to ensure metrological accuracy across varying load conditions.

Feature Summary

• Integrates high-precision analog-to-digital converters for simultaneous multi-channel signal acquisition
• Includes dedicated hardware accelerators for calculating complex power parameters without CPU intervention
• Supports direct connection to external CT/PT sensors with programmable gain stages
• Features on-chip calibration memory for storing individual channel correction factors

Applications

• Three-phase smart electricity meters for utility billing
• Industrial energy monitoring panels
• Power quality analyzers
• Sub-metering devices in commercial buildings

Procurement Notes

Verify the specific suffix 'AU-R' corresponds to the tape-and-reel packaging variant if reel handling is required for assembly. Confirm the operating temperature grade matches the application environment, as industrial variants may have different thermal specifications compared to commercial grades. Ensure the pinout compatibility with the target PCB footprint before finalizing procurement orders.

Selection Notes

Select this component when high-accuracy multi-phase energy measurement is required with minimal host processor overhead. It is suitable for designs needing integrated signal conditioning and digital filtering. Consider the package size and pin count relative to available board space. Evaluate the need for internal calibration storage versus external non-volatile memory requirements for long-term data retention.

Part Context

This device belongs to Microchip's AT90 series of energy metering ICs, designed to replace discrete solution architectures. It consolidates analog sensing, ADC, and digital processing into a single chip, reducing bill-of-materials complexity. The series is widely adopted in modern smart grid infrastructure due to its compliance with international metrology standards.

Replacement Considerations

Public confirmed substitute part numbers only; omit otherwise.