Energy Measurement. 78M6618 Datasheet


78M6618 Measurement. Datasheet pdf. Equivalent


Part Number

78M6618

Description

Octal Power and Energy Measurement

Manufacture

Maxim Integrated

Total Page 30 Pages
Datasheet
Download 78M6618 Datasheet


78M6618
19-5346; Rev 3/11
A Maxim Integrated Products Brand 
DS_6618_005
78M6618
Octal Power and
Energy Measurement IC
DATA SHEET
March 2011
DESCRIPTION
FEATURES
The Teridian 78M6618 is a highly integrated IC for
independent monitoring and measurement of up to eight
single-phase AC outlets. With multiple host interface options,
an integrated LCD driver, and configurable I/Os, the device is
ideal for metered power distribution units (PDUs) and rack
enclosures for the data center, as well as intelligent power
strips and subpanels in the grid-friendly digital home.
At the measurement interface, the device provides 10 analog
inputs for interfacing to voltage and current sensors. Scaled
voltages from the sensors are fed to our Single Converter
Technology® that uses a 21-bit delta-sigma ADC, independent
32-bit compute engine (CE), digital temperature compensation,
and precision voltage references to provide better than 0.5%
accuracy over a wide 2000:1 dynamic range.
The integrated MPU core and 128KB of flash memory provides
a flexible means of configuration, postprocessing, data
formatting, interfacing to host processor through a UART or
SPI™ interface, displaying output data to an LCD, or using
DIO pins for intelligent relay control. Complete firmware for
common applications is available from Teridian and can be
loaded into the IC during manufacturing test. Alternatively, a
complete array of ICE, development tools, and programming
libraries are available to allow customization MPU code for
each application.
< 0.5% Wh Accuracy Over Wide 2000:1
Current Range and Over Temperature
Exceeds IEC 62053/ANSI C12.20 Standards
Voltage Reference < 40ppm/°C
10 Sensor Inputs—V3P3 Referenced
21-Bit Delta-Sigma ADC with Independent
32-Bit Compute Engine (CE)
8-Bit MPU (80515), One Clock Cycle per
Instruction with 4KB MPU XRAM
128KB Flash with Security
Integrated ICE for MPU Debug
32kHz Time Base with Hardware Watchdog
Timer
UART and High-Speed Slave SPI Host Interface
Options
Up to 19 General-Purpose 5V Tolerant I/O Pins
LCD Driver (Up to 70 Pixels)
Packaged in a Lead(Pb)-Free/RoHS-Compliant
(6/6) 68-Pin QFN
Robust Sub-Metering Application Firmware:
o True RMS Calculations for Current, Voltage,
Line Frequency, Real Power, Reactive
Power, Apparent Power, and Power Factor
o Accumulated Watt-Hours, Kilowatt-Hours,
and Cost
o Intelligent Switch Control at Zero Crossings
o Digital Temperature Compensation
o Phase Compensation (15)
o Quick Calibration Routines
o 46-64Hz Line Frequency Range with Same
Calibration
o Programmable Alarm Thresholds
o High-Level UART Communication Protocols
o High-Level SPI Communication Protocols
Rev. 1.4
Single Converter Technology is a registered trademark of
Maxim Integrated Products, Inc.
SPI is a trademark of Motorola, Inc.
© 2011 Teridian Semiconductor Corporation
1

78M6618
78M6618 Data Sheet
DS_6618_005
Table of Contents
1 Hardware Functional Description...................................................................................................... 5
1.1 Hardware Overview ..................................................................................................................... 5
1.2 Device Reset................................................................................................................................ 7
1.3 Power Management..................................................................................................................... 7
1.3.1 Voltage Regulator ............................................................................................................ 7
1.3.2 Power Fault Management................................................................................................ 7
1.3.3 BROWNOUT.................................................................................................................... 7
1.3.4 SLEEP mode ................................................................................................................... 7
1.4 Analog Front End (AFE)............................................................................................................... 7
1.4.1 Analog Current and Voltage Inputs ................................................................................. 8
1.5 Digital Computation Engine (CE)................................................................................................. 8
1.6 80515 MPU Core ......................................................................................................................... 8
1.6.1 SFR.................................................................................................................................. 9
1.7 XRAM........................................................................................................................................... 9
1.8 IORAM ......................................................................................................................................... 9
1.9 FLASH.......................................................................................................................................... 9
1.9.1 Program Security ............................................................................................................. 9
1.10 Oscillator ...................................................................................................................................... 9
1.11 PLL and Internal Clock Generation.............................................................................................. 9
1.12 Real-Time Clock (RTC).............................................................................................................. 10
1.13 Hardware Watchdog Timer ........................................................................................................ 10
1.14 Temperature Sensor .................................................................................................................. 10
1.15 General Purpose Digital I/O ....................................................................................................... 10
1.16 LCD Drivers ............................................................................................................................... 11
1.17 EEPROM Interface .................................................................................................................... 11
1.18 SPI Slave Port............................................................................................................................ 11
1.19 Test Port..................................................................................................................................... 12
1.20 UARTs........................................................................................................................................ 13
1.20.1 UART1 (OPT_TX/OPT_RX) .......................................................................................... 13
1.21 In Circuit Emulator (ICE) Port .................................................................................................... 13
2 Electrical Specifications................................................................................................................... 14
2.1 Absolute Maximum Ratings ....................................................................................................... 14
2.2 Recommended External Components....................................................................................... 15
2.3 Recommended Operating Conditions........................................................................................ 15
2.4 Performance Specifications ....................................................................................................... 16
2.4.1 Input Logic Levels.......................................................................................................... 16
2.4.2 Output Logic Levels ....................................................................................................... 16
2.4.3 Power-Fault Comparator ............................................................................................... 16
2.4.4 Battery Monitor............................................................................................................... 17
2.4.5 Supply Current ............................................................................................................... 17
2.4.6 V3P3D Switch ................................................................................................................ 17
2.4.7 2.5 V Voltage Regulator................................................................................................. 18
2.4.8 Low-Power Voltage Regulator ....................................................................................... 18
2.4.9 Crystal Oscillator............................................................................................................ 18
2.4.10 LCD DAC ....................................................................................................................... 18
2.4.11 LCD Drivers ................................................................................................................... 19
2.4.12 Optical Interface............................................................................................................. 19
2.4.13 Temperature Sensor...................................................................................................... 19
2.4.14 VREF ............................................................................................................................. 20
2.4.15 ADC Converter, V3P3A Referenced ............................................................................. 21
2.5 Timing Specifications ................................................................................................................. 22
2.5.1 Flash Memory ................................................................................................................ 22
2.5.2 EEPROM Interface ........................................................................................................ 22
2.5.3 RESET ........................................................................................................................... 22
2.5.4 RTC................................................................................................................................ 22
2.5.5 SPI Slave Port (MISSION Mode)................................................................................... 23
2 Rev. 1.4


Features 19-5346; Rev 3/11 A Maxim Integrated Products Brand  DS_6618_005 78M6618 Octal Power and Energy Measurement IC DATA SHEET March 2011 DESCRIPTION FEA TURES The Teridian 78M6618 is a highly integrated IC for independent monitori ng and measurement of up to eight singl e-phase AC outlets. With multiple host interface options, an integrated LCD dr iver, and configurable I/Os, the device is ideal for metered power distributio n units (PDUs) and rack enclosures for the data center, as well as intelligent power strips and subpanels in the grid -friendly digital home. At the measurem ent interface, the device provides 10 a nalog inputs for interfacing to voltage and current sensors. Scaled voltages f rom the sensors are fed to our Single C onverter Technology® that uses a 21-bi t delta-sigma ADC, independent 32-bit c ompute engine (CE), digital temperature compensation, and precision voltage re ferences to provide better than 0.5% ac curacy over a wide 2000:1 dynamic range. The integrated MPU core and .
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