TDA7540B Datasheet, PDF(20/75 Page) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)

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TDA7540B Datasheet, PDF (20/75 Pages) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)

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Electrical specifications

1. Intermodulation Suppression

a2 = VO(signal,@1KHz) / VO(spurious, @1KHz) ; fs = (2x10KHz) - 19KHz

a3 = VO(signal,@1KHz) / VO(spurious, @1KHz) ; fs = (3x13KHz) - 38KHz

measured with: 91% stereo signal; 9% pilot signal; fm = 10kHz or 13kHz.

TDA7540B

2. Traffic Radio (V.F.) Suppression

a57(V,W,F) = VO(signal,@1KHz) / VO(spurious, @1KHz+/-23KHz)

measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% sub carrier (f=57kHz,

fm=23Hz AM, m=60%)

3. SCA ( Subsidiary Communications Authorization )

a67 = VO(signal,@1KHz) / VO(spurious, @9KHz) ; fs = (2x38KHz) - 67KHz

measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA â sub carrier ( fS =

67kHz, unmodulated ).

4. ACI ( Adjacent Channel Interference )

a114 = VO(signal,@1KHz) / VO(spurious, @4KHz) ; fs = 110KHz - (3x38KHz)

a190 = VO(signal,@1KHz) / VO(spurious, @4KHz) ; fs = 186KHz - (5x38KHz)

measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal ( fS =

110kHz or 186kHz, unmodulated).

0) All thresholds are measured inTestmode at the quality output. The thresholds are

calculated by

VNBTH - VPEAK

VPEAK is adjusted by applying a 150kHz sinewave at MPXIN.

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