Datasheet

LT1991
17
1991fh
4
V
S
–
4
V
S
–
V
S
+
1991 F09
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
IN
V
EE
V
S
–
V
S
+
V
S
–
V
S
+
V
S
+
V
S
–
V
S
+
V
S
–
V
S
+
V
S
–
V
S
+
V
S
–
V
S
+
V
S
–
V
S
+
V
S
–
V
S
+
V
S
–
V
S
+
REF
LT1991
8
9
10
1
2
3
7
6
5
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
IN
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
IN
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
IN
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
V
IN
V
IN
V
IN
OUT
V
CC
V
OUT
V
IN
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
IN
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
IN
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
IN
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
GAIN = –0.25 GAIN = –1 GAIN = –2.25
GAIN = –3 GAIN = –4 GAIN = –4.5
GAIN = –6 GAIN = –9
GAIN = –12 GAIN = –13
GAIN = –10
Figure 9. It Is Simple to Get Precision Inverting Gains with the LT1991.
Input Impedance Varies from 45kΩ (Gain = –13) to 450kΩ (Gain = –1)
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