71M6543G

71M6543F/71M6543G Energy Meter ICs GENERAL DESCRIPTION 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. C Shunt Current Sensors NEUTRAL B LOAD A POWER SUPPLY NEUTRAL Note: This system is referenced to Neutral 3x 71M6xx3 Resistor Dividers 71M6xx3 71M6xx3 71M6xx3 Pulse Transformers AMR IR HOST MUX and ADC IADC0 IADC1 }IN* VADC10 (VC) IADC6 IADC7 }IC VADC9 (VB) IADC4 IADC5 }IB VADC8 (VA) IADC2 IADC3 }IA V3P3A V3P3SYS GNDA GNDD ...