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71M6601 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 71M6601
기능 Isolated Sensor ICs
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71M6601 데이터시트, 핀배열, 회로
71M6103/71M6113/
71M6201/71M6203/
71M6601/71M6603
Isolated Sensor ICs
DATA SHEET
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.
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
Shunt Current Sensors
C
NEUTRAL
B
A
LOAD
POWER SUPPLY
NEUTRAL
Note: This system is referenced to Neutral
3x 71M6xx3
Pulse Transformers
AMR
IR
HOST
MUX and ADC
IADC0
IADC1
}IN*
VADC10 (VC)
I
I
ADC
ADC
6
7
}IC
VADC9 (VB)
IADC4
IADC5
}IB
VADC8 (VA)
IADC2
IADC3
}IA
V3P3A V3P3SYS GNDA GNDD
71M6543F/
71M6543H
PWR MODE
CONTROL
WAKE-UP
REGULATOR
VBAT
VBAT_RTC
TEMPERATURE BATTERY
SENSOR
MONITOR
VREF
SERIAL PORTS
TX
RX
MODUL- RX
ATOR TX
POWER FAULT
COMPARATOR
SPI INTERFACE
RAM
COMPUTE
ENGINE
FLASH
MEMORY
MPU
RTC
TIMERS
ICE
COM0...5
SEG
SEG/DIO
LCD DRIVER
DIO, PULSES
DIO
V3P3D
OSCILLATOR/
PLL
XIN
XOUT
*IN = Neutral Current
9/17/2010
BATTERY
RTC
BATTERY
LCD DISPLAY
8888.8888
PULSES,
DIO
I2C or µWire
EEPROM
32 kHz
For pricing, delivery, and ordering information, please contact Maxim Direct at
19-5704; Rev 3; 12/12
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.




71M6601 pdf, 반도체, 판매, 대치품
71M6xxx Data Sheet
1 HARDWARE DESCRIPTION
The 71M6103/71M6113/71M6201/71M6203/71M6601/71M6603 (71M6xxx) remote sensor ICs integrate
all functional blocks required to implement an isolated front-end with digital communication capability.
Figure 1 shows the 71M6xxx IC block diagram. The chip includes the following:
Preamplifier with a fixed gain
22-bit delta-sigma ADC
ADC voltage reference
Temperature sensor
VCC monitor
Power-on reset circuitry
Bidirectional pulse interface
Active rectifiers for supply-voltage generation from the power pulses provided by the 71M654x
Digital control section providing control registers for the selection of operation modes
INP
SHUNT
INN
+
-
PREAMP
-
+ CROSS
ADC
VREF
ADC_CLK
VBIAS
ADC_OUT
BUFFER
VCC
1:1.1 SP
To
71M654X
SN
Primary Secondary
PLL
PULSEIO
RD_DATA
VDD
RD_CLK
WR_DATA
RD_DATA
CHOP
POWER
ON
RESET
ACTIVE
RECTI-
FIERS
DIGITAL SECTION
RESET
DATA_IN[15:0]
BAND
GAP
IBIAS
TEMP/VCC
MONITOR
OTP MEMORY
GND VCC
TEST
Figure 1: Block Diagram
2 FUNCTIONAL DESCRIPTION
During normal operation, the SP and SN pins of the 71M6xxx are connected to the pulse transformer.
When PLL_FAST = 1 in the 71M654x, power pulses generated by the 71M654x arrive every 610.35ns.
The PLL in the 71M6xxx locks to these incoming power pulses. The communication between the
71M654x and the 71M6xxx is synchronized to the multiplexer frames of the 71M654x. The
communication protocol is Maxim Integrated-proprietary, and details are not described in this data sheet.
All aspects of the communication between the 71M654x and the 71M6xxx are managed on the hardware
level and they are completely transparent to the user.
The communication interface can run at two different data rates. Power pulses are generated every
610.35ns if the PLL_FAST register in the 71M654x is set to 1, and every 1.905µs if PLL_FAST is set to 0.
The power pulses are 101.7ns wide with PLL_FAST = 1, and 160ns wide with PLL_FAST = 0.
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71M6601 전자부품, 판매, 대치품
Current Shunt
Sensor
71M6xxx Data Sheet
Load
Voltage
Sensing
71M6 xxx
56
R1 1 k
R2 1 k
71
8 2 34
C1
1. 0 µF
Pulse
Transformer
71M654x
Figure 2: External Components Connected to the 71M6xxx
3.3 Connections to Sensors and to the 71M654x
Figure 3 shows the sensor connections for single-phase meter application using a 71M6541D/F and
71M6x01. This single-phase configuration uses one local shunt and one shunt isolated with a 71M6x01
device. Since the local shunt is connected to the LINE circuit, the meter is also referenced to the LINE
circuit.
Figure 4 shows the sensor connections for a polyphase meter application using a 71M6543F/H or
71M6545/H. This polyphase configuration uses three 71M6xx3 to isolate the shunt sensors for the three
phases, while a locally connected fourth shunt sensor can be optionally used to sense neutral current.
Since the local shunt is connected to the neutral circuit, the meter is also referenced to the neutral circuit.
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