71M6542F
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71M6542F

Energy Meter ICs

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

Part Details
Features
  • SoC Integration and Unique Isolation Technique Reduces BOM Cost Without Sacrificing Performance
    • 0.1% Typical Accuracy Over 2000:1 Current Range
    • Exceeds IEC 62053/ANSI C12.20 Standards
    • Four-Quadrant Metering
    • 46-64Hz Line Frequency Range with the Same Calibration
    • Phase Compensation (±10°)
    • Independent 32-Bit Compute Engine
    • 32KB Flash, 3KB RAM (71M6541D)
    • 64KB Flash, 5KB RAM (71M6541F/42F)
    • 128KB Flash, 5KB RAM (71M6541G/42G)
    • Built-In Flash Security
    • SPI Interface to Host with Flash Program Capability
    • Up to Four Pulse Outputs with Pulse Count
    • 8-Bit MPU (80515), Up to 5 MIPS
    • Full-Speed MPU Clock in Brownout Mode
    • LCD Driver Allows Up to 6 Commons/Up to 56 Pins
    • 5V LCD Driver with DAC
    • Up to 51 Multifunction DIO Pins
    • Hardware Watchdog Timer (WDT)
    • Two UARTs for IR and AMR
    • IR LED Driver with Modulation
  • Innovative Isolation Technology (Requires Companion 71M6xxx Sensor, also from Maxim Integrated) Eliminates Current Transformers
    • Two Current Sensor Inputs with Selectable Differential Mode
    • Selectable Gain of 1 or 8 for One Current Input to Support Neutral Current Shunt
    • High-Speed Wh/VARh Pulse Outputs with Programmable Width
  • Digital Temperature Compensation Improves System Performance
    • Metrology Compensation
    • Accurate RTC for TOU Functions with Automatic Temperature Compensation for Crystal in All Power Modes
  • Power Management Extends Battery Life During Power Outages
    • 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
Additional Details
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The 71M6541D/71M6541F/71M6541G/71M6542F/71M6542G are 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 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.

The 71M654x family operates over the industrial temperature range and comes in 64-pin (71M6541D/F/G) and 100-pin (71M6542F/G) lead(Pb)-free LQFP packages.

Applications

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Documentation
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

71M6541F-DB

Demo Board for the 71M6541F

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71M6541F-DB

Demo Board for the 71M6541F

Demo Board for the 71M6541F

Features and Benefits

Demo Kit Contents
  • Demo Board D6541 REV 3.0 containing one 71M6601 or 71M6201 Remote Sensor Interface and One 71M6541F IC with Preloaded Demo Program
  • 5V DC/1000mA Universal Wall Transformer with 2.5mm Plug (Switchcraft 712A Compatible)
  • Serial-USB Converter
  • USB Cable
  • ANSI Base with 50µΩ Shunt Resistor (Optional, for ANSI Kits Only) or Two 120µΩ Shunt Resistors

Product Detail

The Maxim Integrated 71M6541-DB REV 3.0 Demo Board is a demonstration board for evaluating the 71M6541 device for single-phase electronic energy metering applications in conjunction with the remote sensor interface. It incorporates a 71M6541 integrated circuit, a 71M6601 remote interface IC, peripheral circuitry such as a serial EEPROM, emulator port, and on-board power supply. A serial-to-USB converter allows communication to a PC through a USB port. The Demo Board allows the evaluation of the 71M6541 energy meter chip for measurement accuracy and overall system use.
The board is preprogrammed with a Demo Program (Demo Code) in the flash memory of the 71M6541F IC. This embedded application is developed to exercise all low-level function calls to directly manage the peripherals, flash programming, and CPU (clock, timing, power savings, etc.).
The 71M6541F IC on the Demo Board is preprogrammed and precalibrated for the 50µΩ or 120µΩ shunt shipped with the board. The Demo Board may also be used for operation with a CT after hardware modifications that can be easily performed by the user. This configuration will require a different version of the Demo Code.

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