DS8911 Datasheet (National Semiconductor) - Sound Up-Conversion Frequency Synthesizer

DS8911, Sound Up-Conversion Frequency Synthesizer

The DS8911 is a digital Phase-Locked Loop (PLL) frequency synthesizer intended for use as a Local Oscillator (LO) in electronically tuned radios The device is used in conjunction with a serial data controller a loop filter some varactor diodes and several passive elements to provide the local oscill

DS8911 Features

* Y Y Y Y Y Y Direct synthesis of LW MW SW FM and WB frequencies Serial data entry for simplified processor control 10 12 5 25 and 100 kHz reference frequencies 8 possible tuning resolutions (see Table II) An op amp with high impedance inputs for loop filtering Programmable mixer with high dynamic ra