Energy Meter ICs

Industry’s Most Integrated Metering SoC Product Line and Best-in-Class Accuracy Performance

Overview

Technical Documents

Ordering Info

Status

Part Number	Status
71M6521DE	This product is Not Recommended for New Designs. Some versions may be No Longer Available or being discontinued and subject to Last Time Buy, after which new orders can not be placed. See Ordering Information for details.
71M6521DH	Future Product
71M6521FE	This product is Not Recommended for New Designs. Some versions may be No Longer Available or being discontinued and subject to Last Time Buy, after which new orders can not be placed. See Ordering Information for details.

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.

Data Sheet

Download	Rev 2	(PDF, 2MB)
E-Mail

An evaluation kit is available: 71M6521FE-DB 80515-FPBM-TFP2

NOTE: This product uses the following:
71M6521 EVKIT Code

Key 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—V_DD Referenced
Low-Jitter Wh and VARh Pulse Test Outputs (10kHz max)
Pulse Count for Pulse 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/O Pins Compatible with 5V Inputs
64-Pin LQFP or 68-Pin QFN Package
Lead(Pb)-Free Packages

Applications/Uses

Residential Meters, 0.5% Accuracy

Notes and Comments

TFP2 Flash Programmer:
- For in-system programming
- Can be used with simple socket module board to preprogram individual ICs (refer to the programming application note for examples of socket board schematics)
ADM51 ICE (In-Circuit Emulator):
- Signum Systems ADM51 is compatible with the Keil symbolic output format
- Performs code emulation with breakpoints, watch windows, etc., with support of source code symbols
- Can be used to program small engineering and prototype build requirements
Third-Party Programmer Supplier:
Firmware Development Tools:
- Available from Keil

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-5370 Rev 2; 2011-11-10
This page last modified: 2011-11-10