78M6631-IM/F/P2

Overview

The 78M6631-IM/F/P2 is a three-phase power measurement and monitoring System-on-Chip (SoC) from Analog Devices Inc./Maxim Integrated. It integrates a 10MHz 8051-compatible MPU core with Teridian’s Single Converter Technology, featuring a 22-bit delta-sigma ADC and a 32-bit compute engine. The device supports both Delta and Wye configurations for three-phase systems. It provides six analog inputs for interfacing with current and voltage sensors. Key specifications include less than 0.5% watt accuracy over a 2000:1 current range and across temperature variations. It includes 128KB of flash memory, 4KB XRAM, and multiple communication interfaces including UART, I²C, and high-speed SPI.

Feature Summary

• Integrates a 10MHz 8051-compatible microprocessor unit with 128KB flash memory and 4KB XRAM for flexible configuration and post-processing.
• Utilizes Single Converter Technology containing a 22-bit delta-sigma converter and a 32-bit compute engine for high-precision measurements.
• Supports pin- or bi-selectable Delta or Wye configurations for versatile three-phase connection setups.
• Provides six analog inputs specifically designed for interfacing with external current and voltage sensors.

Applications

• Building automation systems requiring precise energy monitoring
• Data center power distribution units (PDUs)
• Communication equipment power management
• Motor run applications and solar inverters

Procurement Notes

Verify the specific suffix 'IM/F/P2' against official datasheets to confirm package type and operating temperature range. Confirm availability status as discontinued parts may require alternative sourcing strategies. Ensure compatibility with existing firmware architectures given the integrated 8051 core. Check for any regional supply restrictions or RoHS compliance documentation prior to procurement.

Selection Notes

Select this component for applications demanding high-accuracy three-phase power measurement exceeding IEC 62053 standards. It is suitable for designs requiring integrated processing capabilities alongside analog-to-digital conversion. Consider the 2000:1 dynamic range and low voltage reference drift for critical metering applications. Evaluate the available GPIO pins for relay control or LED indication needs within the system design.

Part Context

This part belongs to the 78M6631 series of highly integrated power measurement SoCs. It is designed specifically for wide variety of applications requiring three-phase power and quality measurements. The series leverages Teridian’s Single Converter Technology to achieve high precision in a compact form factor, supporting both standalone and host-processor interfaced configurations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify if other variants within the 78M66xx series offer compatible pinouts or functionality if direct replacement is required.

FAQ

What types of three-phase connections does the 78M6631 support?

The device supports both Delta and Wye configurations, which can be selected via pins or binary selection.

What is the maximum clock frequency of the integrated MPU core?

The integrated 8051-compatible MPU core operates at a maximum clock frequency of 10MHz.

How many analog inputs are provided for sensor interfacing?

The device provides six analog inputs, consisting of three differential current inputs and three voltage inputs.