71M6103/71M6113/

71M6201/71M6203/

71M6601/71M6603

Isolated Sensor ICs

DATA SHEET

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 4; 1/15

GENERAL DESCRIPTION

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.

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.

These metering SoCs operate over the industrial temperature

range and are available in an 8-pin lead(Pb)-free SO package.

MPU

RTC

TIMERS

IADC0

VADC8 (VA)

IADC2

VADC9 (VB)

XIN

XOUT

RX

TX

TX

RX

COM0...5

V3P3A V3P3SYS

VBAT

VBAT_RTC

IADC4

VADC10 (VC)

SEG

GNDA GNDD

SEG/DIO

DIO

ICE

C

B

A

NEUTRAL

LOAD

8888.8888

PULSES,

DIO

IR

AMR

POWER FAULT

COMPARATOR

MODUL-

ATOR

SERIAL PORTS

OSCILLATOR/

PLL

MUX and ADC

LCD DRIVER

DIO, PULSES

COMPUTE

ENGINE

FLASH

MEMORY

RAM

32 kHz

REGULATOR

Shunt Current Sensors

POWER SUPPLY

71M6543F/

71M6543H

TEMPERATURE

SENSOR

VREF

IADC6

BATTERY

PWR MODE

CONTROL

WAKE-UP

NEUTRAL

I

EEPROM

9/17/2010

IADC1

IADC3

IADC5

IADC7

RTC

BATTERY

V3P3D

BATTERY

MONITOR

SPI INTERFACE

HOST

LCD DISPLAY

Pulse Transformers

3x 71M6xx3

Note: This system is referenced to Neutral

*IN = Neutral Current

BENEFITS AND FEATURES

• Reduce BOM by Replacing Expensive

Current Transformers with Current Shunts

•

Compatible with Shunt Resistors as

Low as 50

µΩ

• Accurate Measurement

•

22-Bit ADC

•

On-Chip Power Monitoring

•

Exceeds IEC 62053/ANSI C12.20

Standards

• Galvanic Isolation Through Pulse

Transformer Provides Power, Bidirectional

Data, and Timing Reference

•

3.3mW Typical Consumption

•

On-Chip Power Monitoring