SL1461

www.DataSheet4U.com SEPTEMBER 1993 PRELIMINARY INFORMATION D.S. 3754 1.6 SL1461 WIDEBAND PLL FM DEMODULATOR The SL1461 is a wideband PLL FM demodulator, intended primarily for application in satellite tuners. The device contains all elements necessary, with the exception of external oscillator sustaining network and loop feedback components, to form a complete PLL system operating at frequencies up to 800MHz. An AFC with window adjust is provided, whose output signal can be used to correct for any frequency drift at the head end local oscillator. AFC PUMP AFC WINDOW ADJUST V EE OSCILLATOR + OSCILLATOR – AGC BIAS 1 2 16 15 AFC OUTPUT V CC VIDEO FEEDBACK + VIDEO – VIDEO + VIDEO FEEDBACK – VIDEO OUTPUT RF INPUT 4 5 6 7 8 SL1461S 3 14 13 12 11 10 9 FEATURES J Single chip PLL system for wideband FM demodulation J Simple low component count application J Allows for application of threshold extension J Fully balanced low radiation design J High operating input sensitivity J AGC detect and bias adjust J 75W video output drive with low distortion levels J Dynamic self biasing analog AFC J Full ESD protection * * Normal ESD handling procedures should be observed AGC OUTPUT RF INPUT MP16 Fig. 1 Pin connections top view APPLICATIONS J Satellite receiver systems J Data communications systems ORDERING INFORMATION SL1461S/KG/MPAS AGC BIAS RF INPUTS AGC OUTPUT 6 8 9 7 14 12 13 11 VIDEO FEEDBACK + VIDEO + VIDEO – VIDEO FEEDBACK – VIDEO OUTPUT AFC PUMP AFC OUTPUT 10 1 LOC...