Energy Meter IC

The 71M6521BE is a highly integrated SoC with an MPU core, flash, and LCD driver. Teridian's 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 low-cost external components. A 32kHz crystal time-base for the entire system further reduces system cost. The IC supports 2-wire single-phase residential metering along with tamper-detection mechanisms.

Maximum design flexibility is provided by multiple UARTs, I²C, MICROWIRE™, up to 14 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 AMR and prepay meters that comply with worldwide electricity metering standards.

Applications

* Residential Meters, 0.5% Accuracy

* < 0.4% Wh Accuracy Over 2000:1 Current Range and Over Temperature

* Exceeds IEC 62053/ANSI C12.20 Standards

* Voltage Reference < 40ppm/°C

* Four Sensor Inputs—VDD Referenced

* Low Jitter Wh Test Output (10kHz maximum)

* Pulse Count for Wh Pulse Output

* Tamper Detection: Neutral Current with CT or Shunt

* Three Battery Modes with Wake-Up on Pushbutton or Timer

* Brownout Mode (48µA)

* LCD Mode (5.7µA)

* Sleep Mode (2.9µA)

* 8KB Flash with Security