71M6542F MAXIM [Maxim Integrated Products], 71M6542F Datasheet - Page 94

• Manufacturer Part Number: 71M6542F
• Description: 0.1% Accuracy Over 2000:1 Current Range Energy Meter ICs
• Manufacturer: MAXIM [Maxim Integrated Products]

71M6541D/F/G and 71M6542F/G Data Sheet
4.4
Figure 36
71M6x01 Isolated Sensor Interface. This configuration implements a single-phase measurement with
tamper-detection using the second current sensor. This configuration can also be used to create a split
phase meter (e.g., ANSI Form 2S). For best performance, the IAP-IAN current sensor input is configured
for differential mode (i.e., DIFFA_E = 1, I/O RAM 0x210C[4]). 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
Figure 3
NEUTRAL
71M6541D/F/G Using 71M6x01and Current Shunts
LINE
for the AFE configuration corresponding to
shows a typical connection for one isolated and one non-isolated shunt sensor, using the
TERIDIAN
71M6xx1
Shunt
Trans-
former
Pulse
HOST
AMR
Figure 36: 71M6541D/F/G with 71M6x01 isolated Sensor
IR
Shunt
NEUTRAL
IAN
IBP
IBN
SPI INTERFACE
IAP
SERIAL PORTS
VA
MODUL-
POWER FAULT
COMPARATOR
MUX and ADC
ATOR
LINE
TX
RX
VREF
TX
RX
LOAD
TEMPERATURE
Figure
V3P3A V3P3SYS
71M6541D/F
TERIDIAN
COMPUTE
MEMORY
SENSOR
ENGINE
TIMERS
FLASH
MPU
RAM
RTC
ICE
POWER SUPPLY
36.
Note:
This system is referenced to LINE
GNDA GNDD
OSCILLATOR/
11/5/2010
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
DIO