Datasheet
®
PGA202/203
10
FIGURE 9. Floating Source Programmable Gain Instrumen-
tation Amplifier.
FIGURE 11. Programmable Differential In/Differential Out
Amplifier.
V
OUT
= 2G V
IN
PGA203
8
7
1
2
4
11
12
V
OUT
1MΩ
14
+
–
Gain Control
PGA202
8
7
4
11
12
+
–
V
IN
PGA202
8
7
4
11
12
+
–
1
1
2
2
V
OUT
A
0
A
1
PGA203
8
7
1
2
4
11
12
14
+
–
R
R
I
OUT
R
L
Gain Control
+V
CC
10k
Ω
FIGURE 12. Programmable Current Source.
PGA202
8
7
1
2
4
11
12
14
+
–
V
IN
PGA203
8
7
1
2
4
11
12
14
+
–
V
OUT
A
2
A
3
A
0
A
1
A
3
A
2
A
1
A
0
GAIN
0000 1
0001 2
0010 4
0011 8
0100 10
0101 20
0110 40
0111 80
1 0 0 0 100
1 0 0 1 200
1 0 1 0 400
1 0 1 1 800
1 1 0 0 1000
1 1 0 1 2000
1 1 1 0 4000
1 1 1 1 8000
FIGURE 13. Cascaded Amplifiers.
FIGURE 10. Low Noise Differential Amplifier with Gains of
100, 200, 400, 800.
PGA203
8
7
1
2
4
11
12
14
+
–
V
OUT
10kΩ
10kΩ
200Ω
+
–
+
–
OPA27
OPA27
V
IN
Gain Control