The 71M6515H is a high-accuracy analog front-end (AFE) IC that provides measurements for 3-quadrant 3-phase metering. It combines 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 to achieve high accuracy and wide dynamic range. The Single Converter Technology® reduces cross talk and cost. This IC also provides RTC and battery backup for time-of-use (TOU) metering.
The 71M6515H Energy Meter IC provides a high‑accuracy analog front‑end for 3‑quadrant, 3‑phase metering. It integrates a 21‑bit sigma‑delta ADC, a precision voltage reference, a real‑time clock with battery backup, and a compute engine, all accessed via a UART interface.
The device operates from a single 3.3 V supply, consumes about 30 mW, and is offered in a 64‑lead LQFP package. It supports multiple sensor types (CTs, shunts, Rogowski coils) and includes eight multipurpose I/O pins, pulse‑output options, and extensive alarm functions for voltage sag, over‑voltage, and over‑current conditions.
| Supply Voltage (V3P3A/V3P3D) | 3.0 V – 3.6 V (typical 3.3 V) |
|---|---|
| Power Consumption | 30 mW at 3.3 V typical |
| Package | 64‑lead LQFP |
| Accuracy | <0.1 % Wh over 2000:1 range |
| UART Interface | UART with programmable IRQZ interrupt |
| Battery Backup Current | 2 µA typical at 25 °C |
The IC communicates with the host processor via a UART interface that includes a programmable IRQZ interrupt.
It includes a battery‑backed real‑time clock that stays powered during a supply outage, with a typical backup current of 2 µA at 25 °C.
The device consumes about 30 mW when operating from a 3.3 V supply.
It delivers less than 0.1 % Wh accuracy over a 2000:1 measurement range.