DESCRIPTION

The Teridian™ 78M6631 is a highly integrated 3-phase power measurement and monitoring system-on-chip (SoC), with a 10 MHz 8051-compatible MPU core and Single Converter Technology® containing a 22-bit deltasigma converter and 32-bit compute engine (CE). The 78M6631 has been designed specifically for a wide variety of applications requiring 3-phase power and quality measurements. It supports both Delta and Wye configurations.

FEATURES

• < 0.5% Watt Accuracy Over 2000:1 Current Range and Over Temperature

• Exceeds IEC 62053/ANSI C12.20 Standards

• Voltage Reference < 40 ppm/°C

• Six Analog Inputs Supporting 3-Phase Voltage and Current Measurement Inputs

• Pin- or Biselectable Delta or Wye Configuration

• 22-Bit Delta-Sigma ADC with Independent 32- Bit Compute Engine (CE)

• 8-Bit MPU (80515), One Clock Cycle per Instruction with 4 KB MPU XRAM

• 128 KB Flash with Security

• 32 kHz Time Base with Hardware Watchdog Timer

• UART, I2C, and High-Speed Slave SPI Host Interface Options

• 17 General-Purpose 5 V Tolerant I/O Pins

• Packaged in a RoHS-Compliant (6/6) Lead(Pb)-Free 56-Pin TQFN

• Application Firmware Includes (per Phase):

    o True RMS Current and Voltage Calculations

    o Active, Reactive, Apparent, Fundamental, and Harmonic Power Calculations

    o Fundamental and Harmonic Current and Voltage Calculations

    o Line Frequency and Power Factor Calculations

    o Phase Compensation (18 at 60 Hz)

    o Built-In Calibration Routines

    o Programmable Alarm Thresholds

    o Command Line (UART) Communications

    o High-Speed SPI Communications