Isolated Energy Measurement Processor for Polyphase Monitoring Systems

The MAX78615+PPM is part of an isolated energy measurement processor (EMP) chipset for polyphase power monitoring systems. It is designed for real-time monitoring for a variety of typical three-phase configurations in industrial applications.

The device provides flexible sensor configuration for up to three MAX78700s or MAX71071s that provide up to six isolated analog inputs for interfacing to voltage and current sensors. Scaled voltages from the sensors are fed to the isolated front-end utilizing a high-resolution delta-sigma converter. Supported current sensors include resistive shunts and current transformers (CTs).

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 MAX78615+PPM can be a completely autonomous solution.

The MAX78615+PPM is designed to interface to the host processor through the UART, SPI, or I²C interfaces, and is available in a 24-pin TQFN package.

Applications

* Building Automation Systems * Grid-Friendly Appliances and Smart Plugs * Inverters and Renewable Energy Systems * Level 1 and 2 EV Charging Systems * Polyphase Submetering

* Best-In-Class Embedded Algorithms Support Highly Accurate Electricity Measurements

* Voltage, Current, and Frequency

* Active, Reactive, and Apparent Power/Energy

* Power Quality Measurements Including Peak Current and Harmonic Content

* Digital Temperature Compensation

* Configurable Device Provides Design Flexibility

* Nonvolatile Storage of Calibration and Configuration Parameters.

* SPI, I²C, or UART Interface Options

* Configurable I/O Pins for Alarm Signaling, Address Pins, or User Control

* Highly Integrated Features Support Compact Designs and Reduced Bill of Materials

* Small 24-Pin TQFN Package

* Internal or External Oscillator Timing References

* Three Remote ADC Interfaces Provide Cost- Effective and Reliable Isolation

* Quick Calibration Routines Minimize Manufacturing (System) Cost

* Digital Temperature Compensation