TDA7540B Datasheet, PDF (47/75 Pages) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)

TDA7540B
Software specification
Table 19. Addr 8 Quality ISS Filter (continued)
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
00 0
00 1
01 0
01 1
-
-
-
11 1
0
1
0
1
Switch “OFF” ISS filter 120kHz
Switch “ON” ISS filter 80kHz
Switch “OFF” ISS filter 30KHz for weatherband
Switch “ON” ISS filter 30KHz for weatherband
discharge current1µA, charge current mid 74µA
narrow124µA
discharge current3µA, charge current mid 72µA
narrow122µA
discharge current5µA, charge current mid 70µA
narrow120µA
discharge current7µA, charge current mid 68ϖ narrow118µA
-
discharge current15µA,charge current mid
60µAnarrow110µA
Table 20. Addr 9 Quality Detection Adjacent Channel
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0/1 Not valid
0
AC highpass frequency 100kHz
1
AC bandpass frequency 100kHz
0
AC gain 32dB
1
000
AC gain 38dB
AC wide band threshold 0.25V
001
AC wide band threshold 0.35V
010
AC wide band threshold 0.45V
-
-
-
111
-
AC wide band threshold 0.95V
00
AC narrow band threshold 0.0V
01
AC narrow band threshold 0.1V
10
AC narrow band threshold 0.2V
11
AC narrow band threshold 0.3V
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