71M6542F MAXIM [Maxim Integrated Products], 71M6542F Datasheet - Page 96
71M6542F
Manufacturer Part Number
71M6542F
Description
0.1% Accuracy Over 2000:1 Current Range Energy Meter ICs
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
1.71M6542F.pdf
(166 pages)
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isolated sensor. For best performance, the IAP-IAN current sensor input is configured for differential mode
71M6541D/F/G and 71M6542F/G Data Sheet
4.6
Figure 38
(i.e., DIFFA_E = 1, I/O RAM 0x210C[4]). The 71M6x01 Isolated Sensor Interface is used to isolate phase B.
The outputs of the 71M6x01 Isolated Sensor Interface are routed through a pulse transformer, which is
connected to the pins IBP-IBN. The IBP-IBN pins must be configured for remote sensor communication
(i.e., RMT_E =1, I/O RAM 0x2709[3]). See
PHASE A
71M6542F/G Using 71M6x01 and Current Shunts
shows a typical two-phase connection for the 71M6542F/G using one isolated and one non-
TERIDIAN
71M6XX1
Shunt
NEUTRAL
Trans-
former
Pulse
HOST
AMR
PHASE B
IR
Figure 38: 71M6542F/G with 71M6x01 Isolated Sensor
Shunt
NEUTRAL
IAP
IAN
SPI INTERFACE
SERIAL PORTS
MODUL-
POWER FAULT
PHASE A
IBP
IBN
COMPARATOR
VB
VA
MUX and ADC
ATOR
TX
RX
Figure 5
VREF
TX
RX
LOAD
LOAD
for the AFE configuration corresponding to
TEMPERATURE
V3P3A V3P3SYS
TERIDIAN
71M6542F
COMPUTE
MEMORY
ENGINE
SENSOR
TIMERS
FLASH
MPU
RAM
RTC
ICE
POWER SUPPLY
Note:
This system is referenced to PHASE A
GNDA GNDD
OSCILLATOR/
REGULATOR
DIO, PULSES
LCD DRIVER
VBAT_RTC
PWR MODE
CONTROL
BATTERY
MONITOR
WAKE-UP
COM0...5
SEG/DIO
PLL
VBAT
V3P3D
XOUT
SEG
DIO
XIN
BATTERY
RTC
BATTERY
8888.8888
LCD DISPLAY
32 kHz
I
2
EEPROM
PULSES,
C or µWire
Figure
DIO
38.
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