SA1088

Silan Semiconductors FM RECEIVER CIRCUIT FOR BATTERY SUPPLY DESCRIPTION The SA1088 is a bipolar integrated circuit for use in mono portable and pocket radios. It is used when a minimum of perpheral components (of small dimensions and low costs) is important. The circuit contains a frequency-locked-loop(FLL) system with an intermediate frequency(IF) of about 70kHz. Selectivity is achieved by active RC-filters. De-tuning related to the IF and too weak input signal is suppressed by the mute circuit. SA1088 FEATURES * Equipped with all stages of a mono receiver from antenna to audio output. * Mute Circuit * Search tuning with a single varicap diode * Mechanical tuning with integrating AFC * AM application supported * Power supply polarity protection * Power supply voltage down to 1.8V SOP-16 APPLICATION 1. Mechanical tuning: This is possible with or without integrated AFC circuit 2. Electrical tuning: This is realized by one directional(band-up) search tuning facility, including RESET to the lower-band limit. PIN CONFIGURATIONS www.DataSheet4U.com MUTE VOAF LOOP VP OSC IF FB CLP1 VOIF 1 2 3 4 5 6 7 8 16 15 14 TUNE CAP GND CLIM VIRF VIRF CLP2 VIIF SA1088 13 12 11 10 9 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.0 2001-11-22 1 www.DataSheet4U.com 180pF 3.3nF 3.9nF 330pF 0.1­F 470pF RUN 22nF BLOCK DIAGRAM 6 11 5k¡ 70nH 7 8 9 10 13 15 3 82pF V1 Mixer All pass Filter 2.2k¡ 2.2k¡ +1 6k¡ 5.4k¡ IF Limter Silan Semiconductors 10k¡ 68pF 220p...