Analog Devices EVAL-AD4114 User Manual page 20

UG-1819
ISOLATION
ISOLATION AND POWER SUPPLY CIRCUTY ARE BASED OF
AN EMC DESIGN. MORE DETAILS CAN BE FOUND IN AN-1572
V_IO
IN
GND1 C36 C37
1UF 0.1UF
SCLK
R27 33
IN
CS
R28 33
IN
MOSI
R29 33
IN
+5V MISO
R30 33
OUT
C40 C41
10UF 0.1UF
POWER SUPPLY
V_USB
IN
J4
C50
1
R39
2
4.7MEG
3
DNI
C51
4.7NF
CHGND1
U3
ADUM5411BRSZ
C38 C39
1 24
VDD1 VDD2
0.1UF 1UF
2 23
GND1 GNDISO
3 22
VIA VOA
4 21
VIB VOB
5 20
VIC VOC
6 19
VOD VID
7 18
VE1 VE2
8 17
NIC NIC
GND_ADUM
9 16
GND1 GNDISO
10 15
V_SEL
PDIS VSEL
11 14
VDDP VISO
12 13
GND1 GNDISO
C42
C43
4.7NF 0.1UF
GND_ADUM
+5V
LK3
1
2
3
D18
R41
J13
1K
R40
1
DNI
4.7MEG
PWR
C52
4.7NF
CHGND2
GND_ISO
Figure 24. Insulation and Power Supply Schematic
+VA_ISO
C49
GNDISO
10UF
GND_ISO
B1
B2
B3
B4
DNI DNI
C45 C46
+VA_ISO
B5
GND_ISO
C44
B6
10UF
GND_ISO
Rev. 0 | Page 20 of 24
EVAL-AD4114SDZ
_GND _SCLK _CS
1
GND_ISO
R31 33
R32 33
R33 33
R34 33
DNI DNI
C47 C48
R35 SETS THE ISOLATED REGUALTOR
OUTPUT VOLTAGE
OPEN: +VA_ISO = 5V
SHORT: +VA_ISO = 3.3V
R37
V_SEL
16.9K
R38
10K
GND_ADUM
User Guide
_MOSI _MISO
SCLK_ISO
OUT
CS_ISO
OUT
MOSI_ISO
OUT
MISO_ISO
IN
+VA_ISO
R35
R36
DNI 14K