Added Figure 25 - Analog Devices EVAL-AD7625FMCZ User Manual

UG-745
U14
ADR4540BRZ
R44
2 6
+7V
+VIN VOUT
0r
C51 GND
C52
4
10 µF 0.1uF
R48
+5V
0r
C60
C55
0.1uF
10 µF
GND4 GND2 GND1
There are 2 options for using an External Reference
1) Externally buffered reference source of 4.096V applied to the REF pin.
2) External reference of 2.5V applied to the REFIN pin (high impedance input)..
GND5
EVAL-AD7625FMCZ/EVAL-AD7626FMCZ User Guide
External Reference
R38
R46
0r 0r
C43 C44
R39
2.2µF
DNP
DNP
4PT096V_REF
DNP
R41
1PT2V_REFIN
U4
4 6
VIN VOUT_F
3 5
EN VOUT_S
C61 C62
0.1uF 10 µF
2
GND_S
1
GND_F
ADR3412ARJZ
Figure 25. Schematic—External Reference
AMP_PWR+
C47
0.1uF
U8
REF
AD8031ARZ
3
7
+
V+
R45
6
OP
C45
V- 0r
2
DNP - 4
R40
0r
C46
DNP
R50
DNP
VCM
R7
VCM_OUT
0r
C53
10 µF
LK2
REFIN
Rev. A | Page 18 of 28
LK3
REF
C54
0.1uF
C49
0.1uF
U11
7
AD8031ARZ
3
+
V+
6
OP
V-
2
- 4
Default is B to centre linked
C48
R42
1M
10 µF
AMP_PWR+
VCM_BUF
VCM
R47
LK6
VCM
0r