TDA7406 Datasheet, PDF (32/64 Pages) STMicroelectronics – Car radio signal processor

Noise blanker part
TDA7406
Table 6.
Noise blanker electrical characteristics (continued)
All parameters measured in FM mode if not otherwise specified.
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
V_RECTFS
Fieldstrength
controlled Rectifier
Voltage
meas.with
V_MPX=0mV,
V_LEVEL<<
V_SBL
(fully mono)
11
0.5 0.9 (off) 1.3
V
10
0.9
1.4
1.5
V
01
1.7
1.9
2.3
V
00
2.1
2.4
3.1
V
00
T_SFM
Suppression Pulse Duration FM
Signal HOLDN
in Testmode
01
10
11
00
T_SAM
Suppression Pulse Duration AM
Signal HOLDN
in Testmode
01
10
11
38
µs
25.5
µs
32
µs
22
µs
1.2
ms
800
µs
1.0
ms
640
µs
V_RECTADJ
Noise rectifier discharge
adjustment
00
Signal PEAK
01
in Testmode
10
11
0.3
0.8
V/ms
1.3
2.0
Noise rectifier
SR_{PEAK charge}
Signal PEAK
0
in Testmode
1
10
mV/µs
20
00
Noise rectifier adjustment
V_ADJMP through
Multipath
Signal PEAK
in Testmode
01
10
11
0.3
0.5
V/ms
0.7
0.9
R_AMIF AM IF Input resistance
35
50
65
kΩ
G_AMIF,min min. gain AM IF
G_AMIF,max max. gain AM IF
G_AMIF,step step gain AM IF
Signal AM-RECTIFIER in
Testmode
6
dB
20
dB
2
dB
f_AMIF,min min. f_c AM IF
f_AMIF,max max. f_c AM IF
Signal AM-RECTIFIER in
Testmode
14
kHz
56
kHz
1. All thresholds are measured using a pulse with T_R = 2 µs, T_HIGH= 2 µs and T_F = 10 µs. The repetition rate must not
increase the PEAK voltage.
V
in
V
op
DC
TR
T _HIGH
TF
Tim e
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