TDA7521 Datasheet | STMicroelectronics

Analog Front End PRODUCT PREVIEW TDA7521 is a BiCMOS analog front end for CD applications. Four input signals (AC- , BD- , E- and F- ), ing from the pick-up (whose laser diode is driven and controlled by the device itself), are preamplified by a programmable voltage-to-voltage or current-tovoltage stage, depending on the used pick-up. The output signals from the preamplifier stage (AC, BD, E, F and HF, a radio frequency signal obtained by bining the photo-detector outputs as A+B+C+D) are fed to an 8-bit HF ADC (for HF, which carries encoded audio data) and a 6-bit Servo ADC (for AC, BD, E and F, used for focusing, tracking the laser beam and controlling revolution speed). All...