71M6542F MAXIM [Maxim Integrated Products], 71M6542F Datasheet

71M6542F

Manufacturer Part Number

71M6542F

Description

0.1% Accuracy Over 2000:1 Current Range Energy Meter ICs

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.71M6542F.pdf (166 pages)

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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.

Pin Configurations appear at end of data sheet.

Functional Diagrams continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

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.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

NEUTRAL

LINE

TERIDIAN

71M6xx1

Shunt

Trans-

former

Pulse

HOST

AMR

Shunt

Functional Diagrams

NEUTRAL

IAN

IBP

IBN

SPI INTERFACE

IAP

SERIAL PORTS

MODUL-

POWER FAULT

COMPARATOR

MUX and ADC

LINE

ATOR

VREF

LOAD

TEMPERATURE

V3P3A V3P3SYS

TERIDIAN

71M6541D/F

COMPUTE

MEMORY

SENSOR

ENGINE

TIMERS

FLASH

MPU

RAM

RTC

ICE

POWER SUPPLY

Note:

This system is referenced to LINE

GNDA GNDD

OSCILLATOR/

REGULATOR

DIO, PULSES

11/5/2010

VBAT_RTC

LCD DRIVER

PWR MODE

CONTROL

BATTERY

MONITOR

WAKE-UP

COM0...5

SEG/DIO

PLL

VBAT

V3P3D

XOUT

SEG

DIO

XIN

BATTERY

RTC

BATTERY

8888.8888

LCD DISPLAY

32 kHz

PULSES,

C or µWire

EEPROM

DIO

71M6541D/F/G and 71M6542F/G

FEATURES

• 0.1% Accuracy Over 2000:1 Current Range

• Exceeds IEC 62053/ANSI C12.20 Standards

• Two Current Sensor Inputs with Selectable

• Selectable Gain of 1 or 8 for One Current Input to

• High-Speed Wh/VARh Pulse Outputs with

• 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:

• Independent 32-Bit Compute Engine

• 46-64Hz Line Frequency Range with the Same

• Phase Compensation (±10°)

• Three Battery-Backup Modes:

• 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:

• 5V LCD Driver with DAC

• Up to 51 Multifunction DIO Pins

• Hardware Watchdog Timer (WDT)

• I

• 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

Differential Mode

Support Shunts

Programmable Width

Calibration

(71M6542F/G) Lead(Pb)-Free LQFP Package

C/MICROWIRE® EEPROM Interface

- Up to 6 Commons/Up to 56 Pins

Metrology Compensation

Accurate RTC for TOU Functions with

Automatic Temperature Compensation for

Crystal in All Power Modes

Brownout Mode (BRN)

LCD Mode (LCD)

Sleep Mode (SLP)

Energy Meter ICs

DATA SHEET

19-5376; Rev 2; 11/11

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