71M6541D Datasheet, PDF (1/166 Pages) Maxim Integrated Products – 0.1% Accuracy Over 2000:1 Current Range Energy Meter ICs

AVAILABLE
19-5376; Rev 2; 11/11
71M6541D/F/G and 71M6542F/G
Energy Meter ICs
DATA SHEET
GENERAL DESCRIPTION
The 71M6541D/71M6541F/71M6541G/71M6542F/71M6542G are
Teridian™ 4th-generation single-phase metering SoCs with a 5MHz
8051-compatible MPU core, low-power RTC with digital temperature
compensation, flash memory, and LCD driver. Our Single Converter
Technology® with a 22-bit delta-sigma ADC, three or four analog
inputs, digital temperature compensation, precision voltage reference,
and a 32-bit computation engine (CE) supports a wide range of
metering applications with very few external components.
The 71M6541/2 devices support optional interfaces to the Teridian
71M6x01 series of isolated sensors, which offer BOM cost reduction,
immunity to magnetic tamper, and enhanced reliability. Other
features include an SPI interface, advanced power management,
ultra-low-power operation in active and battery modes, 3/5KB shared
RAM and 32/64/128KB of flash memory that can be programmed in
the field with code and/or data during meter operation and the ability
to drive up to six LCD segments per SEG driver pin. High
processing and sampling rates combined with differential inputs offer
a powerful metering platform for residential meters.
A complete array of code development tools, demonstration code,
and reference designs enable rapid development and certification of
meters that meet all ANSI and IEC electricity metering standards
worldwide.
Shunt
NEUTRAL
Shunt
LOAD
Note:
LINE
This system is referenced to LINE
FuNEnUTRcAL tionaPOlWEDR SUiPaPLgY rams
LINE
TERIDIAN
71M6xx1
Pulse
Trans-
former
AMR
IR
HOST
MUX and ADC V3P3A V3P3SYS GNDA GNDD
IAP
PWR MODE
IAN
CONTROL
TERIDIAN ^WAKE-UP
71M6541D/F REGULATOR
VBAT
VA
VBAT_RTC
IBP
TEMPERATURE ^BATTERY
IBN
SENSOR
MONITOR
VREF
SERIAL PORTS
TX
RX
MODUL- RX
ATOR _TX
POWER FAULT
COMPARATOR
SPI INTERFACE
RAM
COMPUTE
ENGINE
FLASH
MEMORY
MPU
RTC
TIMERS
ICE
COM0...5
SEG
SEG/DIO
LCD DRIVER
DIO, PULSES
DIO
V3P3D
OSCILLATOR/
PLL _XIN
XOUT
BATTERY
RTC
BATTERY
LCD DISPLAY
8888.8888
PULSES,
DIO
I²C or µWire
EEPROM
32 kHz
Pin Configurations appear at end of data sheet¹.^1/5/2010
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FEATURES
• 0.1% Accuracy Over 2000:1 Current Range
• Exceeds IEC 62053/ANSI C12.20 Standards
• Two Current Sensor Inputs with Selectable
Differential Mode
• Selectable Gain of 1 or 8 for One Current Input to
Support Shunts
• High-Speed Wh/VARh Pulse Outputs with
Programmable Width
• 32KB Flash, 3KB RAM (71M6541D)
• 64KB Flash, 5KB RAM (71M6541F/42F)
• 128KB Flash, 5KB RAM (71M6541G/42G)
• Up to Four Pulse Outputs with Pulse Count
• Four-Quadrant Metering
• Digital Temperature Compensation:
- Metrology Compensation
- Accurate RTC for TOU Functions with
Automatic Temperature Compensation for
Crystal in All Power Modes
• Independent 32-Bit Compute Engine
• 46-64Hz Line Frequency Range with the Same
Calibration
• Phase Compensation (±10°)
• Three Battery-Backup Modes:
- Brownout Mode (BRN)
- LCD Mode (LCD)
- Sleep Mode (SLP)
• Wake-Up on Pin Events and Wake-On Timer
• 1µA in Sleep Mode
• Flash Security
• In-System Program Update
• 8-Bit MPU (80515), Up to 5 MIPS
• Full-Speed MPU Clock in Brownout Mode
• LCD Driver:
- Up to 6 Commons/Up to 56 Pins
• 5V LCD Driver with DAC
• Up to 51 Multifunction DIO Pins
• Hardware Watchdog Timer (WDT)
• I²C/MICROWIRE® EEPROM Interface
• SPI Interface with Flash Program Capability
• Two UARTs for IR and AMR
• IR LED Driver with Modulation
• Industrial Temperature Range
• 64-Pin (71M6541D/F/G) and 100-pin
(71M6542F/G) Lead(Pb)-Free LQFP Package
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.