Energy Meter ICs

The 71M6543F/71M6543G are 4th-generation polyphase metering systems-on-chips (SoCs) with a 5MHz 8051-compatible MPU core, low-power real-time clock (RTC) with digital temperature compensation, flash memory, and LCD driver. Our Single Converter Technology® with a 22-bit delta-sigma ADC, seven analog inputs, digital metrology temperature compensation, precision voltage reference, and a 32-bit computation engine (CE) supports a wide range of metering applications with very few external components.

The 71M6543F/71M6543G support optional interfaces to the 71M6xx3 series of isolated sensors that offer BOM cost reduction, immunity to magnetic tamper, and enhanced reliability. The ICs feature ultra-low-power operation in active and battery modes, 5KB shared RAM, and 64KB (71M6543F) or 128KB (71M6543G) of flash memory, which can be programmed with code and/or data during meter operation.

A complete array of code development tools, demonstration code, and reference designs enable rapid development and certification of meters that meet all ANSI and IEC electricity metering standards worldwide. Applications

* Energy Meters

* Magnetic Interference Demo

* 0.1% Typical Accuracy Over 2000:1 Current Range

* Exceeds IEC 62053/ANSI C12.20 Standards

* Seven Sensor Inputs with Neutral Current Measurement, Differential Mode Selectable for Current Inputs

* Selectable Gain of 1 or 8 for One Current Input to Support Shunts

* High-Speed Wh/VARh Pulse Outputs with Programmable Width

* 64KB Flash, 5KB RAM (71M6543F)

* 128KB Flash, 5KB RAM (71M6543G)

* Up to Four Pulse Outputs with Pulse Count

* Four-Quadrant Metering, Phase Sequencing

* Digital Temperature Compensation:

* Metrology 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 (±7°)

* Three Battery-Backup Modes:

* Brownout Mode

* LCD Mode

* Sleep Mode

* 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 5MIPS

* Full-Speed MPU Clock in Brownout Mode

* LCD Driver:

* 6 Common Segment Drivers

* Up to 56 Selectable Pins

* Up to 51 Multifunction DIO Pins

* Hardware Watchdog Timer (WDT)

* I2C/MICROWIRE® EEPROM Interface

* SPI Interface with Flash Program Capability

* Two UARTs for IR and AMR

* IR LED Driver with Modulation

* Industrial Temperature Range

* 100-Pin Lead-Free LQFP Package