Datasheet

Data Sheet AD5421
Rev. G | Page 33 of 36
09128-200
ADC 0
PRESSURE
SENSOR
SIMULATION
TEMPERATURE
SENSOR
PT100
3.3V
ADC 1
ADC
DAC
ADuCM360
SRAM
FLASH
CLOCK
RESET
WATCHDOG
T1: CD
T2: RTS
T3: COM
T4: TEST
SPI
UART
AD5700
AD5421
V
CC
HART_OUT
REF
ADC_IP
3.3V
3.3V
V
DD
C
IN
C_HART
C_SLEW
HART
INPUT
FILTER
COM
V-REGULATOR
TEMPERATURE
SENSOR
COM
REG
IN
V
LOOP
LOOP–
TEST CONNECTOR
+
–
52Ω
HART MODEM
MICRO-
CONTROLLER
WATCHDOG
TIMER
LEXC
DGNDAGND
Figure 51. Block Diagram—Analog Devices HART-Enabled Smart Transmitter Reference Demo Circuit