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TDA7521

ST Microelectronics
Part Number TDA7521
Manufacturer ST Microelectronics
Description Analog Front End
Published Apr 16, 2005
Detailed Description TDA7521 Analog Front End PRODUCT PREVIEW TDA7521 is a BiCMOS analog front end for CD applications. Four input signals (...
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TDA7521
TDA7521

Overview
TDA7521 Analog Front End PRODUCT PREVIEW TDA7521 is a BiCMOS analog front end for CD applications.
Four input signals (AC*, BD*, E* and F*), coming 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 combining 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 the...


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