19-5704; Rev 6/11
A Maxim Integrated Products Brand
71M6103/71M6113/
71M6201/71M6203/
71M6601/71M6603
Isolated Sensor ICs
DATA SHEET
June 2011
GENERAL DESCRIPTION
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.
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.
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.
FEATURES
•
0.1% Accuracy Over 2000:1 Current
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
•
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
C
NEUTRAL
B
A
Shunt Current Sensors
LOAD
POWER SUPPLY
NEUTRAL
Note: This system is referenced to Neutral
3x TERIDIAN
71M6xx3
MUX and ADC
IADC0
IADC1
}
IN*
VADC10 (VC)
IADC6
IADC7
}
IC
VADC9 (VB)
IADC4
IADC5
}
IB
VADC8 (VA)
IADC2
IADC3
}
IA
VREF
SERIAL PORTS
V3P3A V3P3SYS GNDA GNDD
PWR MODE
CONTROL
WAKE-UP
REGULATOR
VBAT
VBAT_RTC
BATTERY
MONITOR
RTC
BATTERY
BATTERY
71M6xx3
71M6xx3
Resistor Dividers
Pulse Transformers
71M6xx3
TERIDIAN
71M6543F/
71M6543H
TEMPERATURE
SENSOR
RAM
COMPUTE
ENGINE
FLASH
MEMORY
COM0...5
SEG
SEG/DIO
LCD DRIVER
DIO, PULSES
DIO
LCD DISPLAY
AMR
TX
RX
MODUL- RX
ATOR TX
POWER FAULT
COMPARATOR
8888.8888
PULSES,
DIO
I
2
C or µWire
EEPROM
32 kHz
IR
MPU
RTC
TIMERS
ICE
V3P3D
OSCILLATOR/
PLL
XIN
XOUT
9/17/2010
HOST
SPI INTERFACE
*IN = Neutral Current
v1.2
© 2008–2011 Teridian Semiconductor Corporation
1
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