Datasheet
LTC1992 Family
29
1992fb
APPLICATIONS INFORMATION
Figure 4. Basic Fully Differential Amplifier Application Circuits (Note: Single-Ended to Differential Conversion is
Easily Accomplished by Connecting One of the Input Nodes, +V
IN
or –V
IN
, to a DC Reference Level (e.g., Ground))
–
–
+
+
R
IN
R
IN
R
FB
R
FB
Gain Block
–V
IN
+V
IN
V
OCM
–V
OUT
+V
OUT
–
+
R
IN
V
IN
R
FB
V
OUT
R
FB
R
IN
GAIN =
LTC1992
–
–
+
+
R
IN
R
IN
R
FB
R
FB
AC Coupled Gain Block
–V
IN
+V
IN
V
OCM
–V
OUT
+V
OUT
–
+
R
IN
C
IN
C
IN
C
IN
V
IN
R
FB
V
OUT
LTC1992
–
–
+
+
R
IN
R
IN
R
FB
R
FB
Single Pole Lowpass Filter
–V
IN
+V
IN
R
FB
R
IN
W
P
S + W
P
; W
P
=
V
OCM
–V
OUT
+V
OUT
–
+
R
IN
V
IN
R
FB
C
V
OUT
H
(S)
= H
O
•
WHERE H
O
=
LTC1992
C
C
1
R
FB
• C
–
–
+
+
R1
R3
R3
R4
R4R1
R2
R2
3-Pole Lowpass Filter
–V
IN
+V
IN
R2
R1
; W
P
=; W
O
=
V
OCM
–V
OUT
1992 F04
+V
OUT
–
+
R1 R3
R4
R2
C1
C2
V
OUT
WHERE H
O
=
LTC1992
C3
C1
C1
1
R4C3
1
R2R3C1C2
C2
2
C3
2
W
P
S + W
P
H
(S)
= H
O
()
W
O
2
S
2
+ S +
W
O
Q
W
O
2
()
V
IN
R
FB
R
IN
; W
P
=
H
O
=
1
R
IN
• C
IN
S
S + W
P
H
(S)
= H
O
•
C2
C1
R1 • √R2R3
R1 R2 + R1 R2 + R2 R3
•
Q =
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.