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TDA7540B Datasheet, PDF (19/75 Pages) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)
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TDA7540B
Electrical specifications
Table 7.
Electrical characteristics (continued)
(Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V,
VMPX = 500mVrmsmono, f = 1kHz, deemphasis = 50µs, fXtal = 10.25MHz, in application
circuit, unless otherwise specified).
Item Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
33.17
VRECTADJ
Noise rectifier discharge
adjustment
33.18
VRECTADJ
Noise rectifier discharge
adjustment
33.19
VRECTADJ
Noise rectifier discharge
adjustment
33.20
VRECTADJ
Noise rectifier discharge
adjustment
33.21
VADJMP
Noise rectifier adjustment
by multipath
33.22
VADJMP
Noise rectifier adjustment
by strong multipath
influence
33.23
VADJMP
Noise rectifier adjustment
by multipath and strong
multipath influence
33.24 GAMdelay AM delay filter attenuation
34 Multipath Detector
Signal PEAK in testmode,
NBRR=00, NBSMP=0,
MPPC=0
Signal PEAK in testmode,
NBRR=01, NBSMP=0,
MPPC=0
Signal PEAK in testmode,
NBRR=10, NBSMP=0,
MPPC=0
Signal PEAK in testmode,
NBRR=11, NBSMP=0,
MPPC=0
Signal PEAK in testmode,
VMPTC=1V, NBSMP=0,
MPPC=1
Signal PEAK in testmode,
VMPTC=1V,, NBSMP=1,
MPPC=0
Signal PEAK in testmode,
VMPTC=1V,, NBSMP=1,
MPPC=1
f = 2.2kHz
0.3
0.8
1.3
2.0
TBD
TBD
TBD
2
V/ms
V/ms
V/ms
V/ms
V/ms
V/ms
V/ms
dB
34.1
fCMP
Center frequency of
multipath-bandpass
stereo decoder locked on
pilot tone
34.2
34.3
34.4
34.5
34.6
34.7
34.8
GBPMP
GBPMP
GRECTMP
GRECTMP
ICHMP
ICHMP
IDISMP
Min. band pass gain
Max. band pass gain
Min. rectifier gain
Max. rectifier gain
Rectifier charge current
Rectifier charge current
Rectifier discharge current
MPBPG
MPBPG
MPRG
MPRG
MPCC = 0
MPCC = 1
35 Quality detector
19
kHz
6
dB
12
dB
0
dB
7.6
dB
0.8
µA
0.4
µA
1
mA
35.1
a
Min. MP influence factor QDC
35.2
a
Max. MP influence factor QDC
35.3
A
Min. noise influence factor QNG
35.4
A
Max. noise influence factor QNG
0.6
1.05
6
dB
15
dB
19/75
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