ATR4258 Datasheet, PDF (33/38 Pages) ATMEL Corporation – AM/FM RECEIVER IC

ATR4258
Figure 16. Deviation Sensor Frequency Response
1.0
0.8
0.6
0.4
0.2
0.0
100
1000
10000
FM Modulation Frequency (Hz)
100000
Note: FM frequency deviation: 22.5 kHz
Figure 17. FM Input Level Sweep
10
5
0
4.5
-10
4
3.5
-20
3
-30
2.5
-40
2
-50
1.5
-60
1
-70
0.5
-10 0 10 20 30 40 50 60 70 80 90 100 110 120
Input Level [dBµV]
Note: Soft mute threshold bits 68, 69 = 0, bit 70 = 1; soft mute gain bit 67 = 0
gain FM IF amplifier bit 89 to 91 = 1
33
4838A–AUDR–10/04