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MAX78630+PPM Energy Measurement Processor for Polyphase Monitoring Systems

MAX78630+PPM Energy Measurement Processor for Polyphase Monitoring Systems


The MAX78630+PPM is an energy measurement processor (EMP) for polyphase power monitoring systems. It is designed for real-time monitoring for a variety of typical three-phase configurations in industrial applications. It is available in a 32-pin TQFN package.

The MAX78630+PPM provides up to six analog inputs for interfacing to voltage and current sensors. Scaled voltages from the sensors are fed to the single converter front-end utilizing a high-resolution delta-sigma converter. Supported current sensors include current transformers (CT), Rogowski coils, and resistive shunts.

An embedded 24-bit measurement processor and firmware perform all necessary computations and data formatting for accurate reporting to the host. With integrated flash memory for storing nonvolatile calibration coefficients and device configuration settings, the MAX78630+PPM is capable of being a completely autonomous solution.

The MAX78630+PPM is designed to interface to the host processor via the UART interface. Alternatively, SPI or I2C may also be used.



• Six Configurable Analog Inputs for Monitoring a Variety of Delta- and Wye-Connected Three-phase Topologies

• Supports Current Transformers (CT), Resistive Shunts, and Rogowski Coils

• Delta-Sigma ADC with Precision Voltage Reference and On-Chip Temperature Sensor

• Internal or External Oscillator Timing Reference

• SPI, I2C, or UART Interface Options with Configurable I/O pins for alarm Signaling, Address Pins, or User Control

• 24-Bit Measurement Processor with Integrated Firmware and Flash Memory for Nonvolatile Storage of Calibration and Configuration Parameters

• Supports Extraction of Individual Harmonics

• Small 32-TQFN Package and Reduced Bill of Materials