ATR4258 Datasheet, PDF (32/38 Pages) ATMEL Corporation – AM/FM RECEIVER IC

Figure 14. Multipath Sensor Frequency Response
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
100
90% at 25°C
90% at -40°C
60% at 85°C
60% at 25°C
60% at -40°C
1000
10000
AM Modulation Frequency [Hz]
100000
Note: Generator level 40 dBµV
Figure 15. Deviation Sensor
5
4
3
+85°C
2
-40°C
1
0
10000
30000
50000
70000
Frequency Deviation [Hz]
90000
Note: FM modulation frequency: 1 kHz; BW setting 2^nd IF filter = 120 kHz;
demodulator fine tuning (bit 53 = 0)
The center frequency of the integrated band filter has to adjusted
(e.g., IF center frequency = 462.50 kHz).
32 ATR4258
4838A–AUDR–10/04