Datasheet

16
LT1251/LT1256
TYPICAL APPLICATIONS
U
Controlled Gain, Voltage-to-Current Converter
(Current Source)
R
F

1k
R
F

1k
R
F

1k
OUTPUT RESISTANCE DEPENDS
ON MATCHING OF RESISTORS
R
F

1k
R
G

100Ω
× 4
V
IN
1251/56 TA09
2
8
14
13
121053
1
I
OUT
V
C
R
C
R
FS
V
FS
LT1256
–
+
–
+
2
1
R
O

1k
–
+
LT1363
I
OUT
=
()
V
IN

R
O
R
F

R
G
V
C

V
FS
2.5VDC
INPUT
CONTROL
VOLTAGE
R1
R3
V
IN
1251/56 TA13
R
R
INVERTED
HIGHPASS
ALLPASS
LOWPASS
R4
R2
–
+
LT1252
BASIC VARIABLE INTEGRATOR
1.5k
2
8
C
C
14
13
121053
1
V
C
V
C
R
C
R
FS
V
FS
V
FS
LT1256
–
+
–
+
2
1
1.5k
R
R
R
DC
≅ 10k
R1
R2
R3
R4
=
Variable Lowpass, Highpass and Allpass Filter