Texas Instruments ADS1278EVM-CVAL User Manual page 24

Schematic and Bill of Materials
AVDD
R29
100k
BUF_PDN
JP3
2 AVDD
1
PWRDN BUFFERS
C13
0.1uF
AGND
AGND
J3
ANN4 1 2 ANP4
ANN3 3 4 ANP3
ANN2 5 6 ANP2
ANN1 7 8 ANP1
9 10
11 12
13 14 ANP1
15 16
17 18
REFN_HDR
19 20
REFP_HDR
ANN1
AGND AGND
ANP2
ANN2
ANP3
ANN3
24
ADS1278EVM-CVAL Evaluation Module User's Guide
R47
1.0k
C52
1500pF
7 AGND
U11
THS4521IDGKR
R45 1.0k R49 49.9
8 5
R46 1.0k R50 49.9
1 4
2
AVDD
C50
0.1uF
C53
AGND 1500pF
R48
1.0k
AVDD
R22
C39
1.0k
0.1uF
C19
1500pF
AGND
7 AGND U5
BUF_PDN
THS4521IDGKR
R24 1.0k R23 49.9
8 5
R26 1.0k R28 49.9
1 4
2 AVDD
C21
0.1uF
C24
AGND 1500pF
R27
1.0k
Figure 14. Schematic03
Copyright © 2018, Texas Instruments Incorporated
TP10
CHAN-N1
ANN1
BUF_PDN
R43 1.0k
S8
C25
2200pF R42 1.0k
AVDD
CM
ANP1
CHAN-P1
C22
0.1uF
TP9
AGND
ANN3
ANP3
CHAN-N2
ANN2
BUF_PDN
S7
C23 R20
ANP4
2200pF
R21
ANN4
ANP2
CM
CHAN-P2 AVDD
C55
0.1uF
AGND
ANN4
ANP4
R39
1.0k
C48
1500pF
7 AGND
U9
S5
THS4521IDGKR
R37 49.9
8 5
R36 49.9
1 4
AVDD
2
C17
0.1uF
C47
1500pF
R38
1.0k
AGND
R17
1.0k
C14
1500pF
U3 S4
7
THS4521IDGKR
AGND
1.0k R14 49.9
8 5
1.0k R15 49.9
1 4
2 AVDD
C49
0.1uF
C15
1 2
AGND 1500pF
R18
1.0k
SBAU324 – September 2018
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CHAN-N3
C18
2200pF
CHAN-P3
CHAN-N4
C16
2200pF
CHAN-P4