OPA350
OPA2350
OPA4350
SBOS099C − SEPTEMBER 2000 − REVISED JANUARY 2005
www.ti.com
C
B1
2k
Ω
2kΩ
+5V
2
1/ 4
4
1
0.1
µ
F
C
B0
24
13
+V
A
SERIAL DATA A
SERIAL DATA B
BUSY
CLOCK
CS
ADS7861
RD
CONVST
A0
M0
M1
AGND
12
23
22
21
20
19
18
17
16
15
14
Serial
Interface
0.1
µ
F
O P A 43 5 0
V
IN
B1
3
2kΩ
2kΩ
2
6
1/ 4
+V
D
CH B1+
CH B1
−
CH B0+
CH B0−
CH A1+
CH A1
−
CH A0+
CH A0−
REF
IN
REF
OUT
DGND
1
3
7
4
5
C
A1
6
7
V
IN
B0
5
O P A 43 5 0
2k
Ω
2kΩ
8
9
9
1/ 4
8
10
11
V
IN
A1
10
O P A 43 5 0
C
A0
2k
Ω
2kΩ
12
1/ 4
14
11
V
IN
A0
13
O P A 43 5 0
V
IN
= 0V to 2.45V for 0V to 4.9V output.
Choose C
B1
, C
B0
, C
A1
, C
A0
to filter high frequency noise.
Figure 5. OPA4350 Driving Sampling A/D Converter
12