TDA7210V_10 Datasheet, PDF (24/44 Pages) Infineon Technologies AG – ASK/FSK Single Conversion Receiver

In the following figure the shape of the above mentioned bandpass is shown.
gain (pin 18)
v
v-3dB
TDA7210V
Applications
20dB/dec
3dB
0dB
DC
f1
f2
0.18mV/kHz
2mV/kHz
Figure 12 Frequency Characterstic in Case of FSK Mode
The cutoff frequencies are calculated with the following formulas:
f₁ =
2π
1
R1 ⋅ 330 kΩ
⋅ C13
R1 + 330 kΩ
f₂ = v ⋅ f₁ =11⋅ f₁
f₃ = f_3dB
f3 is the 3dB cutoff frequency of the data filter - see Section 3.2.
Example:
R1 = 100 kΩ, C13 = 47 nF
This leads to f1 = 44 Hz and f2 = 485 Hz
-40dB/dec
f
f3
(10)
(11)
(12)
Data Sheet
24
Revision 1.1, 2010-06-18