Analog Devices EVAL-AD7176-2SZD User Manual page 9

Evaluation Board User Guide
IN0
IN1
IN2
IN3
Table 5. R/C Values Used with
Component
R65
R68
R72
1
R91
R92
R93
R99
R100 1
R105
R106
R34
R39
C19
C59
C23
1 Remove R72 and R100 when connecting the
2 Remove R110 and R120 when connecting the
+5V
0.1µF
R92
R68
R91 R72
R65
AD8656
R93
R105 R100
R106
R99
R116
R109
R110 R47
R115
R107
AD8656
R117
R120 R46
R125
R126
R119
0.1µF
+5V
Figure 6. Setup for the
AD8656 Amplifiers (Gain = 2)
U8
Status
0 Ω
1 kΩ, 0.1%
0 Ω
10 Ω
1 kΩ, 0.1%
0 Ω
1 kΩ, 0.1%
0 Ω
10 Ω
1 kΩ, 0.1%
0 Ω
0 Ω
270 pF
270 pF
680 pF
ADA4940-1 to the AD7176-2.
AD8475 to the AD7176-2.
0.1µF
AVSS
R34
AIN0
21
C19
C23
C59
AIN1
22
R39
REFOUT
4
0.1µF
AIN2
23
C28
C26
C27
AIN3
24
+5V
ADR445
*
5V VREF
0.1µF 0.1µF
*USING ADR444 (4.096V REFERENCE) IN PLACE OF
THE ADR445 ALLOWS THE ENTIRE CCT TO BE
OPERATED FROM A SINGLE +5V SUPPLY RAIL.
AD8656 Amplifiers
Component
R107
R109
R110
2
R115
R116
R117
R119
R120 2
R125
R126
R46
R47
C27
C28
C26
Rev. 0 | Page 9 of 40
+5V
0.1µF
6 7 8
AVDD1 AVDD2
AD7176-2
SCLK
13
DIN 12
11
DOUT/RDY
14
CS
REF+ REF–
3 2
0.1µF
4.7µF
U12
Status
0 Ω
1 kΩ, 0.1%
0 Ω
10 Ω
1 kΩ, 0.1%
0 Ω
1 kΩ, 0.1%
0 Ω
10 Ω
1 kΩ, 0.1%
0 Ω
0 Ω
270 pF
270 pF
680 pF
UG-478