Texas Instruments ADS1278EVM-CVAL User Manual page 25

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CHAN-N[5..8]
CHAN-N[5..8]
CHAN-N8
CHAN-N7
CHAN-N6
CHAN-N5
DGND
PWDN[1..8]
PWDN[1..8]
SBAU324 – September 2018
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Channels 5-8 Analog Connections
C12
C10
2200pF
C8
2200pF
C9
2200pF
2200pF
R10
J1
0
1
R8
3
5
0
7
R6
9
0
R4
0
C30 C32 C34 C36
1500pF 1500pF 1500pF 1500pF
AGND AGND AGND AGND
GPIO/Logic Connections
IOVDD
R32
100k
S1
1 16
2 15
3 14
4 13
5 12
6 11
7 10
8 9
IOVDD
DGND
U8
TCA9535RTWR
DGND
IOVDD
C38
0.1uF
DGND
DGND
Figure 15. Schematic04
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R11
CHAN-P8
0
2
R9
4 CHAN-P7
6
0
8
R7
CHAN-P6
10
0
R5
CHAN-P5
0
C37 C35 C33 C31
1500pF 1500pF 1500pF 1500pF
AGND AGND AGND AGND
DGND
R33
100k
IOVDD S2
1 12
2 11
3 10
4 9
5 8
6 7
GPIO[0..4]
GPIO[0..4]
R34
10.0k
R35 C40
4.3k 0.1uF
U7
TCA9535RTWR
IOVDD
DGND
DGND
Schematic and Bill of Materials
CHAN-P[5..8]
CHAN-P[5..8]
IOVDD
U14
1 8
A0 VCC
DGND
C58
2 7
A1 WP
0.1uF
3 6
A2 SCL
SCL
4 5 DGND
VSS SDA SDA
24AA256-I/ST
DGND
C29
0.1uF
ADS1278EVM-CVAL Evaluation Module User's Guide
25