Application information

TS4998

22/33

4.5

Low frequency response

The input coupling capacitors block the DC part of the input signal at the amplifier inputs. In

pass filter with a -3dB cut-off frequency.

for some typical cases.

Figure 64.

-3dB lower cut-off frequency vs. input capacitance

F

CL

1

2

π R

IN

C

IN

×

×

×

----------------------------------------------- Hz

()

=

C

IN

1

2

π R

IN

F

CL

×

×

×

------------------------------------------------ F

()

=

0.2

0.4

0.6

0.8

1

10

100

Rin=24k

Ω

G~6dB

Rin=12k

Ω

G~12dB

Rin=6.2k

Ω

G~18dB

Tamb=25

Input Capacitor Cin (

0.1