78M6610+LMU Measurement Processor Datasheet

78M6610+LMU Datasheet, PDF, Equivalent


Part Number

78M6610+LMU

Description

Energy Measurement Processor

Manufacture

Maxim Integrated

Total Page 30 Pages
Datasheet
Download 78M6610+LMU Datasheet


78M6610+LMU
78M6610+LMU
Energy Measurement Processor
for Load Monitoring Units
DATA SHEET
GENERAL DESCRIPTION
The 78M6610+LMU is an energy measurement processor
(EMP) for load monitoring and control of any 2-wire single-
phase or 3-wire split-phase (120/180°) AC circuit. It
provides flexible sensor configuration of four analog inputs
and numerous host interface options for easy integration
into any system architecture.
The internal 24-bit processor and field upgradeable
firmware performs all the necessary signal processing,
compensation, and data formatting for accurate real-time
measurement. Energy accumulation, alarm monitoring, and
fault detection schemes minimize the overhead
requirements of the host interface and/or network. The
integrated flash memory also provides for nonvolatile
storage of input configurations and calibration coefficients.
APPLICATIONS
Building Automation Systems (Commercial, Industrial)
Inverters and Renewable Energy Systems
Level 1 and 2 EV Charging Systems
Grid-Friendly Appliances and Smart Plugs
FEATURES
Four Configurable Analog Inputs for
Monitoring Any Single-Phase Circuit
(2/3-Wire)
Supports Current Transformers (CT) and
Resistive Shunts
Flexible SPI, I2C, or UART Interface Options
with Configurable I/O Pins for Alarm
Signaling, Address Pins, or User Control
Nonvolatile Storage of Calibration and
Configuration Parameters
Small 24-TQFN Package and Reduced Bill of
Materials
Internal or External Oscillator Timing
References
Quick Calibration Routines Minimize
Manufacturing (System) Cost
Voltage
Sensor(s)
Current
Sensor(s)
Single Converter
Front End
Measurement
Processor
MUX ADC
RAM
FLASH
78M6610+LMU
UART
SPI
I2C
Digital
I/O
Host
Interface
Load
Relay(s)
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-6573; Rev 3; 10/15

78M6610+LMU
78M6610+LMU Data Sheet
Table of Contents
Electrical Specifications............................................................................................................................. 5
ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 5
Recommended External Components .................................................................................................. 5
Recommended Operating Conditions................................................................................................... 5
Performance Specifications .................................................................................................................. 6
Input Logic Levels ....................................................................................................................... 6
Output Logic Levels .................................................................................................................... 6
Supply Current ............................................................................................................................ 6
Crystal Oscillator ......................................................................................................................... 6
Internal RC Oscillator .................................................................................................................. 6
ADC Converter, V3P3 Referenced................................................................................................ 7
Timing Specifications ............................................................................................................................ 8
Reset 8
SPI Slave Port ............................................................................................................................. 8
I2C Slave Port (Note 1)................................................................................................................ 9
Pin Configuration ...................................................................................................................................... 10
Package Information ........................................................................................................................... 11
On-Chip Resources Overview ................................................................................................................. 12
IC Block Diagram ................................................................................................................................ 12
Clock Management ............................................................................................................................. 13
Power-On and Reset Circuitry ............................................................................................................ 14
Watchdog Timer.................................................................................................................................. 14
Analog Front-End and Conversion ..................................................................................................... 15
24-Bit Energy Measurement Processor (EMP)................................................................................... 15
Flash and RAM.......................................................................................................................... 15
Multipurpose DIOs .............................................................................................................................. 15
Communication Interface .......................................................................................................... 15
Functional Description and Operation.................................................................................................... 16
Measurement Interface ....................................................................................................................... 16
AFE Input Multiplexer ................................................................................................................ 16
High Pass Filters and Offset Removal ...................................................................................... 17
Gain Correction ......................................................................................................................... 18
Die Temperature Compensation ............................................................................................... 18
Phase Compensation................................................................................................................ 19
Voltage Input Configuration....................................................................................................... 20
Current Input Configuration....................................................................................................... 23
Data Refresh Rates ............................................................................................................................ 26
Scaling Registers ................................................................................................................................ 26
Calibration ........................................................................................................................................... 27
Voltage and Current Gain Calibration ....................................................................................... 27
Offset Calibration ...................................................................................................................... 27
Die Temperature Calibration ..................................................................................................... 27
Voltage Channel Measurements ........................................................................................................ 28
Quadrature Voltage ................................................................................................................... 28
Voltage Frequency .................................................................................................................... 28
Peak Voltage ............................................................................................................................. 28
RMS Voltage ............................................................................................................................. 28
Current Channel Measurements......................................................................................................... 29
Peak Current ............................................................................................................................. 29
RMS Current ............................................................................................................................. 30
Crest Factor............................................................................................................................... 30
Power Calculations ............................................................................................................................. 31
2 Rev 3


Features 78M6610+LMU Energy Measurement Processor for Load Monitoring Units DATA SHEET GENERAL DESCRIPTION The 78M6610+LMU is an energy measurement processor (EMP) for load monitoring and control of any 2-wire singlephase or 3-wire split-phas e (120/180°) AC circuit. It provides f lexible sensor configuration of four an alog inputs and numerous host interface options for easy integration into any system architecture. The internal 24-bi t processor and field upgradeable firmw are performs all the necessary signal p rocessing, compensation, and data forma tting for accurate real-time measuremen t. Energy accumulation, alarm monitorin g, and fault detection schemes minimize the overhead requirements of the host interface and/or network. The integrate d flash memory also provides for nonvol atile storage of input configurations a nd calibration coefficients. APPLICATIO NS • Building Automation Systems (Com mercial, Industrial) • Inverters and Renewable Energy Systems • Level 1 and 2 EV Charging Systems • Grid-.
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