TDA7540N Datasheet, PDF (24/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system (ISS)

Electrical specifications
Figure 3.
Trigger threshold vs. V_PEAK
VTH
TDA7540N
Min. Trig. T hreshold
280 mV
8 STEPS
147 mV
0.8 V
1200 mV (00)
950 mV (01)
700 mV (10)
450 mV (11)
Noise Controlled Trig. Threshold
1.5 V
V _Peak
Figure 4. Deviation controlled trigger adjustment
VPEAK
[V_OP]
2.0
1.5
1.0
0.8
20
32.5
45
75
00
01
10
11 Detector off
DEVIATION [KHz]
Figure 5. Field strength controlled trigger adjustment
VPEAK
≈ 3V
MONO
N OIS E
noisy signal
STEREO
2.0V (00)
1.6V (01)
1.4V (10)
ATC_SB OFF (11)
good signal
0.8V
E'
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