Texas Instruments ADS1 7 EVM-PDK Series User Manual page 18

A
1
AVDD
TP2 TP3
REF_CKT
(See page -1)
REFP_HDR REFP
AVDD
REFP_HDR[2]
REFN_HDR[2]
AGND
REFN_HDR REFN
AGND
2
[1]
AVDD_1
C42
0.1u
C45
AGND
0.1u
TP5
6
7 OUTB
CM[2]
5
U2-B
AVDD C11
.1u
C44
0.1u
AGND
AGND
3
AVDD
J5
1
2
3
4
5
C26
6
7
10u
8
9
10
AGND
AGND
IOVDD
4
C57
10u
DGND
A
B
AGND C41
0.1u
AVDD_1 [1]
ANALOG_IN
[1,2,3]
CHAN-P6
49 AINP6
CHAN-N6
50 AINN6
CHAN-P5
51 AINP5
CHAN-N5
52 AINN5
53 AVDD
54 AGND
55 VCOM
56 VREFP
57 VREFN
58 AGND
59 AGND
60 AVDD
CHAN-P4
61 AINP4
CHAN-N4
62 AINN4
CHAN-P3
63 AINP3
CHAN-N3
64 AINN3
65 PWPD
AGND
U4
DGND
ANALOG_IN
[1,2,3]
R40
1k
AVDD_1 [1]
C20
0.1u
DGND
AGND
CM1 0
AVDD_1 [1]
CM2 0
DVDD_26 [1]
CM3 0
TP7 TP4
IOVDD_22_23 [1]
CM1-3 are available for current monitoring
DGND
B
C D
R12
47
S6
SW_SSB42
7
SW_IND
GPIO2
8 9
FORMAT0
32
TP6
GPIO3
10
FORMAT1
31
11 12
GPIO4
FORMAT2 TP8
30
4
5
6
FSYNC_DRDY
29
R13 47
1
SCLK
28
2 3
CLK
27
R16 47
DVDD
DVDD_26
26
DGND
25
1u
DGND
24
C43
IOVDD
23
IOVDD
22
DGND
21
IOVDD_22_23 [1]
DOUT1
20
C46
DOUT2
19
0.1u
DOUT3
18
DOUT4
17
DGND
J2
DGND
R41
47
IOVDD
R19
100k
R25
47
CLKDIV [3]
TP11 TP1
AGND
C D
E
JP1
1 2
1 2
IOVDD
JP2
R44
100k
DGND
[1]
IOVDD
U10
5 8
C54
1 CLK 7
PRE
2 4
0.1u
2 D 6
3
CLR
3 Q 5
Q
4
U12
IOVDD
C51
DGND
0.1u
INT/EXT CLK SOURCE
JP4 = HW/SW CTRL (HW/SW)
JP5 = HW SEL (INT/EXT)
IOVDD
IOVDD
(see table below)
4 Y 3
IN0
C56
5 VCC 2
GND
0.1u 6 IN2 1
IN1
DGND
U13
DGND
IOVDD
U6
8 VCC 1
A
7 G 2
B
6 B_A 3
Y R30
0.1u
470k
5 Y 4
GND
C27
DGND
JP4 JP5 Setting
OFF ON Hardware External
Title
OFF OFF Hardware Internal
ON x Software Control (GPIO5)
Size Number
C
Date
G Hupp ads1278evm.sch
Engineer
Filename
E
F
1
DIGITAL
[3]
J4
SYNC
1
GPIO0
2
SCLK
3
4
5
GPIO1
6
7
GPIO2
8
9
10
11
GPIO3
12
13
GPIO4
14
15
SCL
16
17
18
19
R31
SDA
20
470k
2
DGND
DGND
IOVDD IOVDD
R51 R52
47k 47k
JP4 JP5 3
DGND
DGND
IOVDD
IOVDD
4 Y1
C28
3 1
OUT EOH
0.1u
2
DGND
DGND
Texas Instruments
4
ADS1278EVM
Rev
<Number>
E
07APR11 G Hupp
Drawn by
1
4
Sheet of
F
2/9/2012