71M6545 Datasheet | Maxim Integrated

71M6545/71M6545H Metrology Processors GENERAL DESCRIPTION The 71M6545/71M6545H metrology processors are based on 4th-generation metering architecture supporting the 71M6xxx series of isolated current sensing products that offer drastic reduction in ponent count, immunity to magnetic tampering, and unparalleled reliability. The 71M6545/71M6545H integrate our Single Converter Technology® with a 22-bit delta-sigma ADC, a customizable 32-bit putation engine (CE) for core metrology functions, as well as a user-programmable 8051patible application processor (MPU) core with up to 64KB flash and up to 5KB RAM. An external host processor can access metrology functions directly through the SPI™ interface, or alternatively through the embedded MPU core in applications requiring metrology data capture, storage, and preprocessing within the metrology subsystem. In addition, the devices integrate an RTC, DIO, and UART. A plete 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. C Shunt Resistor Sensors NEUTRAL B LOAD Resistor Dividers 71M6xx3 71M6xx3 71M6xx3 HOST POWER SUPPLY This system is referenced to Neutral NEUTRAL Pulse Transformers SPI_CKI SPI_DI SPI_DO SPI_CSZ XFER_BUSY MUX and ADC IADC0 IADC1 } IN- VADC10 (VC) IADC6 IADC7 } VADC9 (VB) IADC4 IADC5 } VADC8(VA) IADC2 IADC3 } IA V3P3A V3P3SYS GNDA GNDD PWR MODE CONTROL 71M6545/H REGULATOR...