Texas Instruments ADS7881, User Manual, Page: 14 / 23

5 ADS78x1EVM Schematics
Figure 5-1 to Figure 5-3 illustrate the schematic drawings for the ADS78x1EVM.
+IN
EXT_REF
B_
CS
B_
RD
B
_CO
NV
ST
B
_B
YT
E
B_
PW
N
/RST
B
U
S
Y
DB[13...
0]
B_
AP
WD
Analog Circuits & A/D
Parallel Control
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
P2
Analog Input
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
P1
+VA
-VA
B_DB[13...0]
DB[13...
0]
CS RD CO
NV
ST
B
YT
E
P
WN/
RST
B
_B
U
S
Y
B
U
S
Y
B_
CS
B_
RD
B
_CO
NV
ST
B
_B
YT
E
B_
PW
N
/RST
+AVCC
+VA
-VA
+BVDD
A
0
A
1
A
2
DC
_
C
S
A_
PW
D
IN
T
c
B_
AP
WD
Power & Digital Buffer
J2
B_DB[13...0]
DB[
13..0]
B_DB0
B_DB1
B_DB2
B_DB3
B_DB4
B_DB5
B_DB6
B_DB7
B_DB8
B_DB9
B_DB10
B_DB11
B_DB12
B_DB13
+AVCC
+BVDD
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
P3
Data Bus
CS
RD
CONVST
BYTE
PWN/RST
B_BUSY
A0
A1
A2
1 2
3 4
5 6
7 8
9 10
J1
Power Supply
+VA -VA
+5VD
AGND
+AVCC
TP10
TP11
TP12
TP14
ADC Control
INTc
DC_CS
1 2
3 4
5 6
7 8
9
11
13
10
12
14
J3
A_PWD
DGND
W5
+3.3VD
Figure 5-1. Schematic Page 1: Digital Buffer
ADS78x1EVM Schematics www.ti.com
14 ADS7881EVM, ADS7891EVM Evaluation Module SLAU150A – DECEMBER 2004 – REVISED OCTOBER 2021
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