Maxim Integrated 71M6515H-IGT/F

Description
The 71M6515H is a high-accuracy analog front-end (AFE) IC designed for 3-quadrant, 3-phase metering applications. It combines a 21-bit sigma-delta A/D converter, a six-input analog front-end, a thermally compensated high-precision reference, and a compute engine to deliver high accuracy and wide dynamic range. The Single Converter Technology® reduces cross talk and cost.

Features
High Accuracy:
<0.1% Wh accuracy over 2000:1 range
Exceeds IEC 62053/ANSI C 12.20 specifications
Up to 10ppm/°C precision ultra-stable voltage reference
Single Converter Technology reduces cross talk and power consumption
Six sensor inputs referenced to V3P3
Compatible with CTs, resistive shunts, and Rogowski Coil sensors
Digital temperature compensation
Sag detection
Measures Wh, VARh, VAh, Vrms, Irms, V-to-V phase, and load angle on each phase
Four-quadrant metering
Four low-jitter pulse outputs from selectable measurements
Four pulse count registers
Selectable default status for pulse pins
Same calibration data for 46Hz to 64Hz line frequency
Broad CT phase compensation ( 7deg)
Battery Backup:
Powers real-time clock during power supply outage
Compatible with Li-ion, NiCd, or super capacitor
Battery backup current 2μA typical at 25°C
External Data Interface:
UART control interface, two selectable data rates
8 general-purpose I/O pins with alarm capability
5 or 10MHz selectable high-speed synchronous serial output for DSP interface
IRQ output signal for alarms and end of measurement intervals
Alarms on voltage sag, overvoltage, overcurrent
Low System Cost:
Power consumption 30mW at 3.3V typical
Real-time clock with temperature compensation
Built-in power-fault detection
Single 32kHz crystal time base
Single-supply operation (3.3V)
64-lead LQFP package

Applications
Energy metering
Power quality monitoring
Demand response
Time-of-use metering