71M6103/71M6113/
71M6201/71M6203/
71M6601/71M6603
Isolated Sensor ICs
DATA SHEET
GENERAL DESCRIPTION
FEATURES
• 0.1% Accuracy Over 2000:1 Current
The 71M6103/71M6113/71M6201/71M6203/71M6601/71M6603
(71M6xxx) isolated sensor ICs enable Maxim Integrated’s 4th-
generation polyphase-metering 71M654x systems-on-chips
(SoCs) to use nonisolating sensors such as resistive shunts
without the need for costly and nonlinear isolation transformers
or CTs. Isolation is provided by low-cost pulse transformers that
form a bidirectional digital communication link between the
71M654x and the isolated sensor ICs.
Range
• Exceeds IEC 62053/ANSI C12.20
Standards
• Compatible with Shunt Resistors as Low
as 50µΩ
• On-Chip Temperature Sensor Enables
Localized Digital Temperature
Compensation by the 71M654x
The 71M6xxx isolated sensor ICs contain a 22-bit delta-sigma
ADC, an amplifier with differential inputs, a precision voltage
reference, a temperature sensor, and a supply voltage generator
that is energized by power pulses provided by the 71M654x.
• 22-Bit ADC
• Powered from the 71M654x Using Pulses
Sent Through the Transformer
• 3.3mW Typical Consumption
• On-Chip Power Monitoring
• Industrial Temperature Range
• 8-Pin Lead(Pb)-Free SO Package
In conjunction with the 71M654x metering SoCs, the isolated
sensor ICs offer unprecedented BOM cost reduction, immunity to
magnetic tampering, and enhanced reliability for single-phase
and polyphase applications.
Shunt Current Sensors
C
NEUTRAL
LOAD
B
A
POWER SUPPLY
NEUTRAL
Note: This system is referenced to Neutral
3x 71M6xx3
MUX and ADC
V3P3A V3P3SYS
GNDA GNDD
Pulse Transformers
IADC0
IADC1
}IN*
PWR MODE
CONTROL
VADC10 (VC)
IADC6
IADC7
}IC
WAKE-UP
71M6543F/
71M6543H REGULATOR
VADC9 (VB)
BATTERY
IADC4
}IB
VBAT
IADC5
VBAT_RTC
VADC8 (VA)
RTC
BATTERY
BATTERY
MONITOR
IADC2
TEMPERATURE
SENSOR
}IA
IADC3
VREF
RAM
COM0...5
LCD DISPLAY
SERIAL PORTS
SEG
COMPUTE
ENGINE
8888.8888
TX
RX
SEG/DIO
AMR
IR
LCD DRIVER
DIO, PULSES
FLASH
MEMORY
PULSES,
DIO
DIO
MODUL-
RX
ATOR
TX
I2C or µWire
EEPROM
POWER FAULT
COMPARATOR
MPU
RTC
V3P3D
OSCILLATOR/
PLL
TIMERS
XIN
SPI INTERFACE
32 kHz
HOST
ICE
XOUT
*IN = Neutral Current
9/17/2010
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.
19-5704; Rev 3; 12/12