TDA7541B Datasheet, PDF (52/77 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

Software specification
TDA7541B
Table 24. Addr 7 Quality AC (FM 50h)
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
ISSBW
- - - - - - - 0 ISS filter fixed band width 120 kHz
1 ISS filter fixed band width 80 kHz
BWDEF
- - - - - - 0 - Disable bit ISSBW for ISS filter band width control
1
Enable bit ISSBW for ISS filter band width control
ACF
- - - - - 0 - - AC highpass frequency 100 kHz
1
AC bandpass frequency 100 kHz
ACTH<4:3>
00
AC detector threshold 0.35 V
- - - 0 1 - - - AC detector threshold 0.45 V
10
11
AC detector threshold 0.55 V
AC detector threshold 0.65 V
TISS<7:5>
0 00
discharge current 1 µA, charge current mid 74 µA, narrow 124 µA
0 01
discharge current 3 µA, charge current mid 72 µA, narrow 122 µA
0 1 0 - - - - - discharge current 5 µA, charge current mid 70 µA, narrow 120 µA
0 11
discharge current 7 µA, charge current mid 68 µA, narrow 118 µA
1 11
discharge current 15 µA, charge current mid 60 µA, narrow 110 µA
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Doc ID 16048 Rev 1