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TDA7513T Datasheet(PDF) 2 Page - STMicroelectronics

No. de pieza TDA7513T
Descripción Electrónicos  Single chip FM/AM tuner with stereo decoder and audio processor
Download  84 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7513T Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
TDA7513T
2/84
Contents
1
Block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2
Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1
FM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2
AM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3
Oscillators (VCC = 8V; Tamb =25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.4
Stereo decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.5
Noise blanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.6
Multipath and quality detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1
FM section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1.1
Mixer1, AGC and 1st IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1.2
Mixer2, limiter and demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1.3
Quality detection and ISS field strength . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1.4
Adjacent channel detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1.5
Multipath detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1.6
450kHz IF narrow bandpass filter (ISS filter) . . . . . . . . . . . . . . . . . . . . . 28
3.1.7
Deviation detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.1.8
ISS switch logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.1.9
Soft mute control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.1.10
Station detector and seek stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2
AM section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3
PLL and IF counter section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.1
PLL frequency synthesizer block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.2
Frequency generation for phase comparison . . . . . . . . . . . . . . . . . . . . 30
3.3.3
Three state phase comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.4
Charge pump current generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.5
Low noise CMOS op-amp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.6
IF counter block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.7
The IF counter mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.8
Sampling timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3.9
Intermediate frequency main counter . . . . . . . . . . . . . . . . . . . . . . . . . . 31


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