Datasheet

OP490
Rev. E | Page 13 of 16
00308-025
DGND
A/B
28
I
OUT1D
DAC DATA BUS
PIN 9 (LSB) TO PIN 16 (MSB)
OP490
DAC8408
DAC D
1/4
DAC8408
DAC C
1/4
DAC8408
DAC B
1/4
DAC8408
DAC A
1/4
DAC8408
V
OUT
D
1
4
11
14
+5V
2
3
13
12
10
9
7
5
6
23
I
OUT2C/2D
24
I
OUT2A/2B
5
I
OUT1B
6
V
REF
D
21
19
18
DIGITAL
CONTROL
SIGNALS
20
17
DS2
DS1
R/W
+2.5V
REFERENCE
VOLTAGE
22
R
FB
D
V
IN
D
C4
0.1µF
25
R
FB
C
V
IN
C
C3
0.1µF
7
R
FB
B
V
IN
B
C2
0.1µF
3
R
FB
A
V
IN
A
C1
0.1µF
R4
10M
V
OUT
C
8
I
OUT1C
25
V
REF
C
27
V
REF
B
8
R3
10M
V
OUT
A
I
OUT1A
4
V
REF
A
2
V
DD
1
R1
10M
V
OUT
B
R2
10M
+
–
1/4
OP490
B
+
–
1/4
OP490
A
+
–
1/4
OP490
C
+
–
1/4
OP490
D
Figure 25. Single-Supply Micropower Quad Programmable Gain Amplifier