Datasheet

TS419-TS421
29/32
Fig. 98 : Differential Input Amplifier
Configuration
Input capacitance C can be calculated by the
following formula using the -3dB lower frequency
required. (F
L
is the lower frequency required)
Note : This formula is true only if:
is ten times lower than F
L
.
The following bill of material is an example of a
differential amplifier with a gain of 2 and a -3dB
lower cuttoff frequency of about 80Hz.
Components :
)(
2
1
1
F
FR
C
L
π
≈
Designator Part Type
R1 20k / 1%
R2 20k / 1%
C
100nF
C
B
=C
S
1µF
U1 TS419/21
)Hz(
C942000
1
F
B
CB
×
=