71M6515H

A Maxim Integrated Products Brand GENERAL DESCRIPTION The 71M6515H is a high-accuracy analog front-end (AFE) IC that provides measurements for 3-quadrant 3-phase metering. The combination of a 21-bit sigma-delta A/D converter with a six-input analog front-end, a thermally compensated high-precision reference, and a compute engine results in high accuracy and wide dynamic range. Our Single Converter Technology® reduces cross talk and cost. This IC also provides RTC and battery backup for time-of-use (TOU) metering. VOLTAGE CURRENT Battery RTC COMPUTE ENGINE VOLTAGE REFERENCE RAM CONTROL TERIDIAN 71M6515H UART, IRQZ SSI HOST PROCESSOR DIO Figure 1: Meter Block Diagram As shown in the block diagram (Figure 1), the host processor communicates with the 71M6515H through a UART interface using the programmable IRQZ interrupt. The 71M6515H calculates and accumulates meter measurements for each accumulation interval. A high-speed synchronous serial port (SSI) is provided to facilitate high-end metering. Integrated rectifying functions on the battery-backup circuit enable minimal external component usage and minimum back-up current. Also, eight multipurpose pins are provided for control of peripherals. Single Converter Technology is a registered trademark of Maxim Integrated Products, Inc. 19-5361; Rev 7/11 71M6515H Energy Meter IC DATA SHEET JULY 2011 FEATURES High Accuracy  < 0.1% Wh accuracy over 2000:1 range  Exceeds IEC 62053/ANSIC 12.20 specifications  Up to 10ppm/...