78M6612 Energy Measurement Datasheet

78M6612 Datasheet, PDF, Equivalent


Part Number

78M6612

Description

Power and Energy Measurement

Manufacture

Maxim Integrated

Total Page 30 Pages
Datasheet
Download 78M6612 Datasheet


78M6612
19-5348; Rev 2; 1/12
78M6612
Single-Phase, Dual-Outlet
Power and Energy Measurement IC
DS_6612_001
DESCRIPTION
The Teridian™ 78M6612 is a highly integrated, single-phase,
power and energy measurement and monitoring system-on-
chip (SoC) that includes a 32-bit compute engine (CE), an
MPU core, RTC, and flash. Our Single Converter
Technology® with a 22-bit delta-sigma ADC, four analog
inputs, digital temperature compensation, and precision
voltage reference supports a wide range of single-phase,
dual-outlet power measurement applications with very few
external components.
With measurement technology leveraged from Maxim’s flagship
utility metering ICs, the device offers features including 32 KB
of flash program memory, 2 KB shared RAM, three low-power
modes with internal timer or external event wake-up, two
UARTs, I2C/MICROWIRE® EEPROM I/F, and an in-system
programmable flash. Complete outlet measurement unit (OMU)
and AC power monitor (AC-PMON) firmware is available or can
be preloaded into the IC.
A complete array of ICE and development tools, programming
libraries and reference designs enable rapid development and
certification of power and energy measurement solutions that
meet the most demanding worldwide electricity metering
standards.
LIVE
NEUT
CT
OUTLET
POWER SUPPLY
POWER
FAULT
32 kHz
CONVERTER
IA
VA
IB
VB
VOLTAGE REF
VREF
VBIAS
SERIAL PORTS
TX0
RX0
RX1
TX1
COMPARATOR
V1
OSC/PLL
XIN
XOUT
V3.3A
V3.3
SYS
TERIDIAN
78M6612
TEMP
SENSOR
GNDA GNDD
PWR MODE
CONTROL
WAKE-UP
REGULATOR
VBAT
V2.5
DIO, PULSE
RAM
FLASH
COMPUTE
ENGINE
COM0..3
SEG0..18
SEG 24..31/
DIO 4..11
SEG 34..37/
DIO 14..17
MPU
RTC
TIMERS
SEG 32,33,
38/ICE
ICE ICE_E
OPTIONAL
BATTERY
OPTIONAL
I2 C or µWire
EEPROM
V3P3D
GNDD
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.
DATA SHEET
FEATURES
Measures Each Outlet of a Duplex Receptacle with
a Single IC
Provides Complete Energy Measurement and
Communication Protocol Capability in a Single IC
Intelligent Switch Control Capability
< 0.5% Wh Accuracy Over 2000:1 Current Range
and Over Temperature
Exceeds IEC 62053/ANSIC12.20 Standards
Voltage Reference < 40 ppm/°C
Four Sensor Inputs – VDD Referenced
Low Jitter Wh and VARh Pulse Test Outputs
(10 kHz max)
Pulse Count for Pulse Outputs
Line Frequency Count for RTC
Digital Temperature Compensation
Sag Detection for Phase A and B
Independent 32-Bit Compute Engine
46-64 Hz Line Frequency Range with Same Calibration
Phase Compensation (±7°)
Battery Backup for RTC and Battery Monitor
Three Battery Modes with Wake-Up Timer:
Brownout Mode (48 µA)
LCD Mode (5.7 µA)
Sleep Mode (2.9 µA)
Energy Display on Main Power Failure
Wake-Up Timer
22-Bit Delta-Sigma ADC
8-Bit MPU (80515), 1 Clock Cycle per Instruction
with Integrated ICE for MPU Debug
RTC with Temperature Compensation
Auto-Calibration
Hardware watchdog Timer, Power-Fail Monitor
LCD Driver (Up to 152 Pixels)
Up to 18 General-Purpose I/O Pins
32 kHz Time Base
32 KB Flash with Security
2 KB MPU XRAM
Two UARTs
Digital I/O Pins Compatible with 5 V Inputs
64-Pin LQFP or 68-Pin QFN Package
RoHS-Compliant (6/6) Lead(Pb)-Free Packages
Complete Application Firmware Available
Rev 2
1

78M6612
78M6612 Data Sheet
Table of Contents
DS_6612_001
1 Hardware Description....................................................................................................................7
1.1 Hardware Overview.................................................................................................................7
1.2 Analog Front End (AFE)..........................................................................................................8
1.2.1 Input Multiplexer..........................................................................................................8
1.2.2 A/D Converter (ADC)...................................................................................................9
1.2.3 FIR Filter .....................................................................................................................9
1.2.4 Voltage References.....................................................................................................9
1.2.5 Temperature Sensor....................................................................................................9
1.2.6 Battery Monitor............................................................................................................9
1.3 Digital Computation Engine (CE)........................................................................................... 10
1.3.1 Real-Time Monitor..................................................................................................... 10
1.3.2 Pulse Generator ........................................................................................................ 10
1.3.3 Data RAM (XRAM) .................................................................................................... 10
1.4 80515 MPU Core .................................................................................................................. 11
1.4.1 UARTs ...................................................................................................................... 11
1.5 On-Chip Resources............................................................................................................... 11
1.5.1 Oscillator................................................................................................................... 11
1.5.2 PLL and Internal Clocks............................................................................................. 11
1.5.3 Real-Time Clock (RTC) ............................................................................................. 12
1.5.4 Temperature Sensor.................................................................................................. 12
1.5.5 Flash Memory ........................................................................................................... 12
1.5.6 Optical Interface ........................................................................................................ 13
1.5.7 Digital I/O .................................................................................................................. 13
1.5.8 LCD Drivers .............................................................................................................. 16
1.5.9 EEPROM Interface.................................................................................................... 16
1.5.10 Hardware Watchdog Timer........................................................................................ 17
1.5.11 Test Ports (TXUXOUT pin) ........................................................................................ 17
2 Functional Description ................................................................................................................ 18
2.1 Theory of Operation .............................................................................................................. 18
2.2 Fault and Reset Behavior...................................................................................................... 19
2.2.1 Reset Mode............................................................................................................... 19
2.2.2 Power Fault Circuit .................................................................................................... 19
2.3 Data Flow ............................................................................................................................. 19
2.4 CE/MPU Communication ...................................................................................................... 20
3 Application Information............................................................................................................... 21
3.1 Connection of Sensors (CT, Resistive Shunt)........................................................................ 21
3.2 Connecting 5 V Devices........................................................................................................ 22
3.3 Temperature Measurement................................................................................................... 22
3.4 Temperature Compensation.................................................................................................. 22
3.5 Connecting LCDs.................................................................................................................. 23
3.6 Connecting I2C EEPROMs .................................................................................................... 23
3.7 Connecting Three-Wire EEPROMs ....................................................................................... 24
3.8 UART0 (TX0/RX0) ................................................................................................................ 24
3.9 UART1 (TX1/RX1) ................................................................................................................ 25
3.10 Connecting V1 and Reset Pins.............................................................................................. 25
3.11 Connecting the Emulator Port Pins........................................................................................ 26
3.12 Flash Programming............................................................................................................... 26
3.13 MPU Firmware Library .......................................................................................................... 26
3.14 Crystal Oscillator................................................................................................................... 26
3.15 Measurement Calibration ...................................................................................................... 27
4 Electrical Specifications.............................................................................................................. 28
4.1 Absolute Maximum Ratings................................................................................................... 28
4.2 Recommended External Components ................................................................................... 29
2 Rev 2


Features 19-5348; Rev 2; 1/12 78M6612 Single-Pha se, Dual-Outlet Power and Energy Measur ement IC DS_6612_001 DESCRIPTION The T eridian™ 78M6612 is a highly integrat ed, single-phase, power and energy meas urement and monitoring system-onchip (S oC) that includes a 32-bit compute engi ne (CE), an MPU core, RTC, and flash. O ur Single Converter Technology® with a 22-bit delta-sigma ADC, four analog in puts, digital temperature compensation, and precision voltage reference suppor ts a wide range of single-phase, dual-o utlet power measurement applications wi th very few external components. With m easurement technology leveraged from Ma xim’s flagship utility metering ICs, the device offers features including 32 KB of flash program memory, 2 KB share d RAM, three low-power modes with inter nal timer or external event wake-up, tw o UARTs, I2C/MICROWIRE® EEPROM I/F, an d an in-system programmable flash. Comp lete outlet measurement unit (OMU) and AC power monitor (AC-PMON) firmware is available or can be preloaded .
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