71M6531F

71M6531D/F, 71M6532D/F Energy Meter IC GENERAL DESCRIPTION The 71M6531D/F and 71M6532D/F are highly integrated SOCs with an MPU core, RTC, FLASH and LCD driver. The patented Single Converter Technology® with a 22-bit delta-sigma ADC, four analog inputs, digital temperature compensation, precision voltage reference, battery voltage monitor and 32-bit computation engine (CE) supports a wide range of residential metering applications with very few lowcost external components. A 32-kHz crystal time base for the entire system and internal battery backup support for RAM and RTC further reduce system cost. The IC supports 2-wire, and 3-wire single-phase and dual-phase residential metering along with tamper-detection mechanisms. The 71M6531D/F offers single-ended inputs for two current channels and two single-ended voltage inputs. The 71M6532D/F has two differential current inputs and three single-ended voltage inputs. Maximum design flexibility is provided by multiple UARTs, I2C, μWire, up to 21 DIO pins and in-system programmable FLASH memory, which can be updated with data or application code in operation. A complete array of ICE and development tools, programming libraries and reference designs enable rapid development and certification of TOU, AMR and Prepay meters that comply with worldwide electricity metering standards. CT/SHUNT A NEUTRAL CT B LOAD LOAD POWER SUPPLY AMR RX/DIO1 IR TX/DIO2 POWER FAULT 32 kHz ADC IAP* IAN* VA IBP* IBN* VB V3.3A V3.3 SYS GNDA GNDD PWR M...