BA1450S

Audio ICs AM radio / FM IF stereo system IC BA1450S The BA1450S is a tuner system IC for electronic tuning for AM radios, FM IF, and MPX. It has been developed for Hi-Fi component applications. The MPX VCO circuit requires no adjustment, which will enable a reduction in the number of production line processes. In particular, the laser lock technique used in the VCO means that no external adjustment is required. FApplications Synthesized tuner for Hi-Fi components. FFeatures 1) Built-in AM monaural radio, FM IF amplifier / detector, and FM stereo demodulator. 2) DTS (both SD and IF count) compatible. 3) Built-in reference voltage power supply provides good shortwave band frequency stability. 4) Good FM stability. 5) The FM MPX VCO uses laser locking making adjustment and external components unnecessary. FAbsolute maximum ratings (Ta = 25_C) 6) Built-in forced monaural operation function for MPX (VCO stops, and LED goes off). 7) Low cutoff of audio is possible to improve AM fidelity. 8) MPX VCO stops in AM mode. 9) Audio muting is possible when an IF request is made. FRecommended operating conditions (Ta = 25_C) 295 Audio ICs FBlock diagram BA1450S 296 Audio ICs FInput / output circuits BA1450S 297 Audio ICs BA1450S 298 Audio ICs BA1450S 299 Audio ICs BA1450S 300 Audio ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 5V) FM IF MPX signal source: fIN = 10.7MHz, modulation 1kHz, 75kHzdev (100%) FM IF MPX signal source fIN = 10.7MHz...