Texas Instruments ADS1278-SP, User Manual, Page: 22 / 32

GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
SCL
SDA
DGND
47 R13
47 R16
DGND
47k R51
47k R52
1
2
JP4
1
2
JP5
470k
R30
47
R41
47
R25
100k
R19
1 2
3 4
5 6
7 8
J2
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
S6
100k
R44
DGND
IOVDD
47
R12
1 2
JP1
1 2
JP2
PWDN1
PWDN2
PWDN3
PWDN4
PWDN5
PWDN6
PWDN7
PWDN8
IOVDD
DGND
DGND
IOVDD
DGND
DGND
IOVDD
DGND
DGND
IOVDD
DGND
IOVDD
DGND
DGND
SCLK
470k
R31
DGND
IOVDD
CLKDIV
AGND DGND
DGND
AVDD
10uF
C26
AGND
0
R53
10uF
C57
IOVDD
0
R54
0
R55
AGND
1.0k
R40
DGND
OPA2350EA/250
7
5
6
4
8
U2B
AGND
CHAN-N1
CHAN-N2
CHAN-P1
CHAN-P2
CHAN-N3
CHAN-N4
CHAN-N5
CHAN-N6
CHAN-N7
CHAN-N8
CHAN-P3
CHAN-P4
CHAN-P5
CHAN-P6
CHAN-P7
CHAN-P8
AGND
GPIO1
GPIO0
GPIO2
GPIO3
GPIO4
AGND DGND
DGND
DGND
SW_IND
INT/EXT CLK SOURCE
JP4 = HW/SW CTRL (HW/SW)
JP5 = HW SEL (INT/EXT)
(see table below)
JP4 JP5 Setting
OFF ON Hardware External
OFF OFF Hardware Internal
ON x Software Control (GPIO5)
AVDD
AGND
CHAN-N[5..8]
CHAN-P[5..8]
CHAN-N[5..8]
CHAN-P[5..8]
PWDN[1..8]
GPIO[0..4]
GPIO[0..4]
SCL
SDA
G PIO[0..4]
GPIO[0..4]
SW_IND
PWDN[1..8]
AVDD
AGND
CM
REFP
REFN
R53, R54, R55 are available for current monitoring
DGND
IOVDD
AINP2
1
AINN2
2
AINP1
4
AINN1
5
DOUT8
18
DOUT7
19
DOUT6
20
DOUT5
21
DOUT4
22
DOUT3
23
DOUT2
24
DOUT1
25
AINP8
58
AINN8
59
AINP7
61
AINN7
62
AINP6
64
AINN6
65
AINP5
67
AINN5
68
AINP4
80
AINN4
81
AINP3
83
AINN3
84
AGND
3
AGND
6
AGND
9
AGND
10
AGND
11
DGND
12
DGND
26
DGND
31
DGND
32
DGND
33
DGND
34
AGND
53
AGND
54
AGND
57
AGND
60
AGND
63
AGND
66
AGND
69
AGND
72
AGND
76
TEST0
13
TEST1
14
CLKDIV
15
SYNC
16
DIN
17
CLK
37
SCLK
38
DRDY/FSYNC
39
FORMAT2
40
FORMAT1
41
FORMAT0
42
MODE1
43
MODE0
44
PWDN8
45
PWDN7
46
PWDN6
47
PWDN5
48
PWDN4
49
PWDN3
50
PWDN2
51
PWDN1
52
VCOM
73
VREFP
74
VREFN
75
AVDD
7
AVDD
8
IOVDD
27
IOVDD
28
IOVDD
29
IOVDD
30
DVDD
35
DVDD
36
AVDD
55
AVDD
56
AVDD
70
AVDD
71
AGND
77
AGND
82
AVDD
78
AVDD
79
ADS1278HFQ/EM
U4
VCOM
VCOM
4 2
SN74LVC1G04MDBVREP
U10A
VCC
5
GND
3
NC
1
SN74LVC1G04MDBVREP
U10B
CHAN-N[1..4]
CHAN-P[1..4]
CHAN-N[1..4]
CHAN-P[1..4]
AVDD_1
AVDD_1
AVDD_1
AVDD_1
AVDD_1
DVDD_26
DVDD_26
IOVDD_22_23
IOVDD_22_23
AVDD = 5V x 0.145A = 0.725W
DVDD = 1.8V x 0.030A = 0.054W
IOVDD = 3.3V x 0.001A = 0.033W
SYNC
A
1
B
2
Y
3
GND
4
Y
5
A/B
6
G
7
VCC
8
SN74LV C2G157DCTR
U6
1
3
5
6
4
2
7
9
10
8
12 11
14 13
16 15
18 17
20 19
J4
TP1 TP11 TP7 TP4
TP5
TP2
TP3
TP6
TP8
1
3
5
6
4
2
7
9
10
8
J5
0.1uF
C11
0.1uF
C20
0.1uF
C27
0.1uF
C28
0.1uF
C41
0.1uF
C42
0.1uF
C44
0.1uF
C45
0.1uF
C46
0.1uF
C51
0.1uF
C56
1µF
C43
VCC
4
EOH
1
GND
2
OUT
3
Y1
CB3LV-3I-27M0000
GND
2
Y
4
IN0
3
IN1
1
IN2
6
VCC
5
SN74LV C1G97IDCKREP
U13
IOVDD
IOVDD
DGND
CLK
1
D
2
Q
3
Q
5
CLR
6
PRE
7
GND
4
VCC
8
SN74LV C2G74MDCUTEP
U12
0.1uF
C54
DGND
Schematic and Bill of Materials
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22 SBAU324 – September 2018
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ADS1278EVM-CVAL Evaluation Module User's Guide
6.1 ADS1278EVM-CVAL EVM Schematics
Figure 12. Schematic01