LT1991 Linear Technology, LT1991 Datasheet - Page 19

• Manufacturer Part Number: LT1991
• Description: Precision / 100uA Gain Selectable Amplifier
• Manufacturer: Linear Technology

APPLICATIONS INFORMATION
V
V
V
V
IN
IN
IN
IN
–
+
–
+
V
V
IN
IN
–
+
10
10
10
8
9
1
2
3
8
9
1
2
3
8
9
1
2
3
M9
M3
M1
P1
P3
P9
M9
M3
M1
P1
P3
P9
M9
M3
M1
P1
P3
P9
V
V
V
LT1991
V
LT1991
V
LT1991
V
GAIN = 0.25
EE
EE
EE
S
S
S
GAIN = 3
GAIN = 6
–
–
–
4
4
4
V
V
V
V
V
V
V
V
CC
CC
CC
S
S
S
IN
IN
+
+
+
7
7
7
REF
REF
REF
–
+
5
5
5
Figure 11. Many Difference Gains Are Achievable Just by Strapping the Pins
OUT
OUT
OUT
10
8
9
1
2
3
M9
M3
M1
P1
P3
P9
6
6
6
V
LT1991
V
EE
GAIN = 12
S
V
V
V
4
–
V
OUT
OUT
OUT
V
CC
S
+
7
REF
5
OUT
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
–
+
–
+
–
+
6
10
10
10
8
9
1
2
3
8
9
1
2
3
8
9
1
2
3
V
M9
M3
M1
P1
P3
P9
M9
M3
M1
P1
P3
P9
M9
M3
M1
P1
P3
P9
OUT
V
V
V
LT1991
LT1991
LT1991
V
V
V
EE
EE
EE
S
S
S
GAIN = 1
GAIN = 4
GAIN = 9
4
–
4
–
4
–
V
V
V
V
V
V
CC
CC
CC
S
S
S
+
+
7
7
7
+
REF
REF
REF
V
V
IN
IN
5
5
5
OUT
OUT
OUT
–
+
10
6
6
6
8
9
1
2
3
M9
M3
M1
P1
P3
P9
V
V
V
V
OUT
OUT
OUT
LT1991
V
EE
GAIN = 13
S
4
–
V
V
CC
V
V
V
S
V
7
IN
IN
IN
+
IN
REF
–
–
+
+
V
V
5
IN
IN
OUT
–
+
10
10
10
6
8
9
1
2
3
8
9
1
2
3
8
9
1
2
3
M9
M3
M1
P1
P3
P9
M9
M3
M1
P1
P3
P9
M9
M3
M1
P1
P3
P9
V
OUT
V
V
V
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LT1991
LT1991
LT1991
GAIN = 2.25
V
V
V
GAIN = 4.5
EE
EE
EE
GAIN = 10
S
S
S
4
4
4
–
–
–
V
V
V
V
V
V
CC
CC
CC
S
S
S
+
7
+
7
+
7
REF
REF
REF
5
5
5
OUT
OUT
OUT
LT1991
6
6
6
19
1991 F11
V
V
V
OUT
OUT
OUT
1991fg