TDA7407 Datasheet, PDF (11/30 Pages) STMicroelectronics – ADVANCED CAR SIGNAL PROCESSOR

TDA7407
Figure 3. Fieldstrength Controlled Trigger Adjustment
VPEAK
»3V
MONO
STEREO
NOISE
2.4V(00)
1.9V(01)
1.4V(10)
ATC_SB OFF (11)
0.9V
noisy signal
D97AU650
Multipath Detector
Internal 19kHz band pass filter
Programmable band pass and rectifier gain
good signal
E'
two pin solution fully independent usable for
external programming
selectable internal influence on Stereoblend
ELECTRICAL CHARACTERISTICS (continued)
Symbol
fCMP
GBPMP
Parameter
Center Frequency of Multipath-
Bandpass
Bandpass Gain
GRECTMP Rectifier Gain
ICHMP
IDISMP
Rectifier Charge Current
Rectifier Discharge Current
Test Condition
Min. Typ. Max. Unit
stereodecoder locked on Pilottono
19
KHz
bits D2, D1 configuration byte = 00
6
dB
bits D₂, D₁ configuration byte = 10
12
dB
bits D₂, D₁ configuration byte = 01
16
dB
bits D₂, D₁ configuration byte = 11
18
dB
bits D₇, D₆ configuration byte = 00
7.6
dB
bits D7, D6 configuration byte = 01
4.6
dB
bits D7, D6 configuration byte = 10
0
dB
bits D₇, D6 configuration byte = 11
off
dB
bit D₅ configuration byte = 0
0.5
µA
bit D₅ configuration byte = 1
1.0
µA
0.5
1
1.5 mA
Quality Detector
Symbol
A
Parameter
Multipath Influence Factor
Test Condition
Addr. 12 / Bit 5+6
B
Noise Influence Factor
Addr. 16 / Bit 1+2
Min. Typ. Max. Unit
00
0.7
dB
01
0.85
dB
10
1.00
dB
11
1.15
dB
00
15
dB
01
12
dB
10
9
dB
11
6
dB
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