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Home » NEWEST Products » New by Manufacturer » Maxim Integrated » 71M6545T/71M6545HT Energy Meter ICs - Maxim Integrated
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Maxim Integrated 71M6545T/71M6545HT Energy Meter ICs

Maxim Integrated 71M6545T/71M6545HT
Energy Meter ICs

Maxim Integrated 71M6545T/71M6545HT Energy Meter processors are based on Maxim Integrated's 4th-generation metering architecture supporting the 71M6xxx series of isolated current sensing products that offer drastic reduction in component count, immunity to magnetic tampering, and unparalleled reliability. The 71M6545T/71M6545HT integrates Maxim's Single Converter Technology® with a 22-bit delta sigma ADC, a customizable 32-bit computation engine (CE) for core energy meter functions, as well as a user-programmable 8051-compatible application processor (MPU) core with 64KB flash and 5KB RAM. An external host processor can access energy meter functions directly through the SPI interface, or alternatively through the embedded MPU core in applications requiring energy meter data capture, storage, and preprocessing within the energy meter subsystem. In addition, the devices integrate an RTC, DIO, and UART. A complete array of ICE and development tools, programming libraries, and reference designs enable rapid development and certification of meters that meet all ANSI and IEC electricity metering standards worldwide.

Features
  • 0.1% Typical Accuracy Over 2000:1 Current Range
  • Exceeds IEC 62053/ANSI C12.20 Standards
  • Four Current Sensor Inputs with Selectable Differential Mode
  • Selectable Gain of 1 or 8 for One Current Input to Support Neutral Current Shunt
  • High-Speed Wh/VARh Pulse Outputs with Programmable Width
  • 64KB Flash, 5KB RAM
  • Up to Four Pulse Outputs with Pulse Count
  • Four-Quadrant Metering
  • Digital Temperature Compensation:
    • Energy Metering Compensation
    • Accurate RTC for TOU Functions with Automatic Temperature Compensation for Crystal in All Power Modes
  • Independent 32-Bit Compute Engine
  • 46-64Hz Line Frequency Range with the Same Calibration
  • Phase Compensation (±10°)
  • Two Battery-Backup Modes:
    • Brownout Mode (BRN)
    • Sleep Mode (SLP)
  • Wake-Up on Pin Events and Wake-On Timer
  • 1µA in Sleep Mode
  • Flash Security
  • In-System Program Update
  • 8-Bit MPU (80515), Up to 5 MIPS (Optional Use)
  • Full-Speed MPU Clock in Brownout Mode
  • Up to 29 Multifunction DIO Pins
  • Hardware Watchdog Timer (WDT)
  • I2C/MICROWIRE® EEPROM Interface
  • SPI Interface to Host with Flash Program Capability
  • UART for AMR or Other Communication Duties
  • Industrial Temperature Range
  • 64-Pin Lead(Pb)-Free LQFP Packages
Applications
  • Three-phase residential, commercial, and industrial energy meters
Block Diagram
Block Diagram
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