19-5704; Rev 6/11
71M6103/71M6113/
71M6201/71M6203/
71M6601/71M6603
Isolated Sensor ICs
A Maxim Integrated Products Brand
DATA SHEET
June 2011
GENERAL DESCRIPTION
FEATURES
• 0.1% Accuracy Over 2000:1 Current
The 71M6103/71M6113/71M6201/71M6203/71M6601/71M6603
(71M6xxx) isolated sensor ICs enable Teridian’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 TERIDIAN
71M6xx3
MUX and ADC
V3P3A V3P3SYS
GNDA GNDD
Pulse Transformers
IADC0
IADC1
}IN*
PWR MODE
CONTROL
VADC10 (VC)
IADC6
IADC7
TERIDIAN
71M6543F/
71M6543H
}IC
WAKE-UP
REGULATOR
VADC9 (VB)
IADC4
IADC5
BATTERY
}IB
VBAT
VBAT_RTC
VADC8 (VA)
RTC
BATTERY
BATTERY
MONITOR
IADC2
TEMPERATURE
SENSOR
}IA
IADC3
VREF
RAM
COM0...5
SEG
LCD DISPLAY
SERIAL PORTS
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
v1.2
© 2008–2011 Teridian Semiconductor Corporation
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