71M6521DE Datasheet, PDF (1/107 Pages) Teridian Semiconductor Corporation – Energy Meter IC

19-5370; Rev 2; 11/11
71M6521DE/DH/FE
Energy Meter ICs
DATA SHEET
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.
A
NEUT
B
CT/SHUNT
LOAD
LOAD
POWER SUPPLY
AMR
RX/DIO1
IR _TX/DIO2
POWER
FAULT
32 kHz
CONVERTER
IA
VA
IB
VB
VOLTAGE REF
VREF
VBIAS
SERIAL PORTS
TX
RX
SENSE
DRIVE/MOD
COMPARATOR
V1
OSC/PLL
XIN
XOUT
V3.3A
V3.3
SYS
TERIDIAN
71M6521
GNDA GNDD
PWR MODE
CONTROL
WAKE-UP
REGULATOR
VBAT
V2.5
TEMP
SENSOR
DIO, PULSE
RAM
FLASH
COMPUTE
ENGINE
MPU
RTC
TIMERS
COM0..3
SEG0..18
SEG 24..31/
DIO 4..11
SEG 34..37/
DIO 14..17
SEG 32,33,
38/ICE
ICE_E
ICE
07/25/2007
BATTERY
3.3V LCD
88.88.8888
IIC or uWire
EEPROM
TEST PULSES
V3P3D
GNDD
Teridian is a trademark and Single Converter Technology is a registered
trademark of Maxim Integrated Products Inc.
MICROWIRE is a registered trademark of National Semiconductor Corp.
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
Rev 2
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