TDA7705_10 Datasheet, PDF (37/42 Pages) STMicroelectronics – Highly integrated tuner for AM/FM car radio

TDA7705
Weak signal processing
5.2.3 High cut control
Table 35. High cut control
(continuous set)
Symbol
Parameter
Test condition
Min
Typ
Max Units
minimum RF level for widest
HCFSsp Start point vs. field strength ^{HC filter (filter # 7)}
0
no multipath present
maximum RF level for
HCFSep End point vs. field strength narrowest HC filter (filter # 0) 0
no multipath present
40
50 dBµV
30
50 dBµV
Field strength-related
HCFStW2N transition time from wide to
narrow band
V_rf step-like variation from
60 dBµV to 10 dBµV
0.001 0.2
20
s
Field strength-related
HCFStN2W transition time from narrow to
wide band
V_rf step-like variation from
0 dBµV to 60 dBµV
0.001
10
20
s
HCmaxBW
Maximum cut-off frequency of
high cut filter bank
Filter #7, -3 dB response
frequency, input signal with
pre-emphasis
HCmin
BW
14
18
kHz
HCminBW
Minimum cut-off frequency of
high cut filter bank
Filter #0, -3 dB response
frequency, input signal with
pre-emphasis
1
3
HCma
xBW
kHz
HCnumFilt Number of discrete HC filters
-
8
-
-
Doc ID 15938 Rev 8
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