Datasheet

Data Sheet AD5700/AD5700-1
Rev. F | Page 19 of 24
Figure 31. Loop-Powered Transmitter Diagram
10435-025
HART_OUT
ADC_IP
REF
AD5700/AD5700-1
47nF 168nF
300pF
DGNDAGND
V
CC
R
L
200kΩ
LOOP–
R
EXT1
R
EXT2
DRIVE
COMREFOUT1 REFIN REG_SEL0 REG_SEL1 REG_SEL2
REG
IN
IODV
DD
DV
DD
REG
OUT
V
LOOP
AD5421
19MΩ
1MΩ
V
LOOP
ADuCM360
SYNC
SCLK
SDIN
SDO
R
INT
/R
EXT
ALARM_CURRENT_DIRECTION
RANGE1
RANGE0
FAULT
LDAC
COM
TXD
RXD
RTS
CD
R1
R1
470Ω
1.2MΩ
150kΩ
1.2MΩ 150pF
OPTIONAL
RESISTOR
T1
OPTIONAL
MOSFET
DN2540
BSP129
0.1µF
SETS REGULATOR
VOLTAGE
C
IN
10µF
0.1µF
1µF
0.1µF
V
Z
= 4.7V
4.7µF
REFOUT2
OPTIONAL
EMC FILTER
1µF