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71M6521DE/DH/FE Energy Meter ICs

GENERAL DESCRIPTION

The Teridian™71M6521DE/DH/FE energy meter ICs are highly integrated systems-on-a -chip (SoCs) with an MPU core, RTC, flash, and LCD driver. The 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 and internal battery-backup support for RAM and RTC further reduce system cost. The ICs support 2-wire, 3-wire, and 4-wire single-phase and dual-phase residential metering along with tamper-detection mechanisms. Maximum design flexibility is provided by multiple UARTs, I2C, MICROWIRE®, up to 18 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.

FEATURES

  • Up to 0.1% Wh Accuracy Over 2000:1 Current Range
  • Exceeds IEC 62053/ANSI C 12.20 Standards
  • Voltage Reference < 40 ppm/°C (< 20ppm/°C for 71M6521DH)
  • Four Sensor Inputs—VDD Referenced
  • Low-Jitter Wh and VARh Pulse Test Outputs (10kHz max)
  • PulseCount forPulse Outputs
  • Four-Quadrant Metering
  • Tamper Detection Neutral Current with CT or Shunt
  • Line Frequency Count for RTC
  • Digital Temperature Compensation
  • Sag Detection for Phase A and B
  • Independent 32-Bit Compute Engine
  • 46-64Hz Line Frequency Range with Same Calibration
  • Phase Compensation (±7°)
  • Battery backup for RTC and battery monitor
  • Three Battery Modes with Wake-Up on Pushbutton or Timer: Brownout Mode (48μA)LCD Mode (5.7μA)Sleep Mode (2.9μA)
  • Energy Display on Main Power Failure
  • Wake-Up with Pushbutton
  • 22-Bit Delta-Sigma ADC
  • 8- Bit MPU (80515), 1 Clock Cycle per Instruction with Integrated ICE for MPU Debug
  • RTC with Temperature Compensation
  • Auto-Calibration
  • Hardware Watchdog Timer, Power-Fail Monitor
  • LCD Driver (Up to 152 Pixels)
  • Up to 18 General-Purpose I/O Pins
  • 32kHz Time Base
  • 16KB (6521DE/DH) or 32KB (6521FE) Flash with Security
  • 2KB MPU XRAM
  • Two UARTs for IR and AMR
  • Digital I/OPins Compatible with 5V Inputs
  • 64-PinLQFP or 68-Pin QFN Package
  • Lead(Pb)-Free Packages