TDA7407_07 Datasheet, PDF (20/46 Pages) STMicroelectronics – Advanced car signal processor

Multipath detector
5
Multipath detector
TDA7407
● Internal 19kHz band pass filter
● Programmable band pass and rectifier gain
● two pin solution fully independent usable for external programming
● selectable internal influence on Stereoblend
Table 8.
Symbol
Multipath electrical characteristics
Parameter
Test condition
Min. Typ. Max. Unit
f_CMP
Center frequency of
multipath-bandpass
stereo decoder locked on pilot tone
19
KHz
bits D₂, D₁ configuration byte = 00
6
dB
G_BPMP Bandpass gain
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
G_RECTMP Rectifier gain
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
I_CHMP Rectifier charge current
bit D₅ configuration byte = 0
bit D₅ configuration byte = 1
0.5
μA
1.0
μA
I_DISMP Rectifier discharge current
0.5 1 1.5 mA
Table 9.
Symbol
Quality detector
Parameter
Test Condition
Min. Typ. Max. Unit
A Multipath Influence factor Addr. 12 / Bit 5+6
B Noise influence factor
Addr. 16 / Bit 1+2
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
20/46