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PDF MAX78615+LMU Data sheet ( Hoja de datos )
| Número de pieza | MAX78615+LMU | |
| Descripción | Isolated Energy Measurement Processor | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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MAX78615+LMU
Isolated Energy Measurement Processor
for Load Monitoring Units
GENERAL DESCRIPTION
The MAX78615+LMU is an isolated 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 up to two MAX78700
(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
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FEATURES
• Utilizes MAX78700 Isolated Data Converter(s) and
Resistive Sensors
• 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
MAX78700
MAX78700
Pulse
XFMR
Interface
Measurement
Processor
RAM
UART
SPI
FLASH
I2C
MAX78615+LMU
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.
19-6571; Rev 0; 12/12
datasheet pdf - http://www.DataSheet4U.net/
1 page  
MAX78615+LMU Data Sheet
ABSOLUTE MAXIMUM RATINGS
(All voltages with respect to ground.)
Voltage Range
VCC................................................................................. -0.5V to +4.6V
Voltage Range
CH1N, CH1P, CH2N, CH2P, CH3N, CH3P .............. -0.5V to (VCC + 0.5V)
Voltage Range
XIN, XOUT ..................................................................... -0.5V to +3.0V
Voltage Range
IFC0, IFC1, SSB/DIR/SCL, SDO/TX/SDAO, SDI/RX/SDAI,
RESET, SPCK/ADDR0 .................................................... -0.5V to +3.0V
Voltage Range, Any Digital Pin Configured
as Input......................................................................... -0.5V to +6.0V
Maximum Current
CH1N, CH1P, CH2N, CH2P, CH3N, CH3P ...................-50mA to +50mA
Maximum Current Range
XIN, XOUT ..................................................................-10mA to +10mA
Maximum Current
IFC0, IFC1, SSB/DIR/SCL, SDO/TX/SDAO, SDI/RX/SDAI, RESET,
SPCK/ADDR0.............................................................-30mA to +30mA
Maximum Current, Any Digital Pin Configured
as Input...................................................................... 10mA to +10mA
Operating Junction Temperature
Peak, 100ms ......................................................................+140°C
Continuous ........................................................................+125°C
Storage Temperature Range .................................. -45°C to +165°C
Lead Temperature (soldering, 10s) ......................................+260°C
Soldering Temperature (reflow)...........................................+300°C
ESD Stress, All Pins .................................................................. ±4kV
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not
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implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED EXTERNAL COMPONENTS
NAME
XTAL
CXS
CXL
FROM
XIN
XIN
XOUT
TO
XOUT
GNDD
GNDD
FUNCTION
20.000MHz
Load capacitor for crystal (exact value depends
on crystal specifications and parasitic capaci-
tance of board)
VALUE
20.000
18 ±10%
18 ±10%
UNITS
MHz
pF
pF
RECOMMENDED OPERATING CONDITIONS
PARAMETER
3.3V Supply Voltage (V3P3)
Operating Temperature
CONDITIONS
Normal operation
MIN TYP MAX UNITS
3.15 3.3 3.45
V
-40 +85 °C
Rev 0
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
MAX78615+LMU Data Sheet
On-Chip Resources Overview
The MAX78615+LMU device, when connected with an isolated MAX78700, integrates all the hardware blocks
required for accurate AC power and energy measurement. Included in the MAX78615 are:
• Oscillator circuits and clock management logic
• Power-on reset, watchdog timer, and reset circuitry
• 24-bit energy measurement processor (EMP) with RAM and flash memory
• Serial UART, SPI, I2C interfaces and multipurpose digital I/O
• Pulse Transformer Interface (for connection to one or more MAX78700)
Block Diagram
The following is a block diagram of the hardware resources available on the MAX78615+LMU.
VCC
GND
XIN
XOUT
RESET
PULSE TRANSFORMER INTERFACES
2.5V
REG
XTAL
OSC
RC
OSC
PULSE TRANSFORMER CONTROL
CLK CLK
SEL GEN
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EMP
SPI
I2C
IO
MUX
UART
TIMERS
WATCHDOG
INFO.
BLOCK
FLASH
4Kx16
PROGRAM
MEMORY
RAM
512x24
Figure 4. Block Diagram
IFC0
MP0 / IFC1
SPCK / ADRR0
SDI / RX / SDAi
SDO / TX / SDAo
MP4
SSB / DIR / SCL
MP6 / ADDR1
MP7
COMP1
COMP2
Rev 0
11
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