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DESCRIPTION

The TDA7513 is the first device for car-radio applications

that combines full RF front-end functions

with audio-processing capabilities.

As far as FM and AM functions are concerned , the

TDA7513 features front-end processing, including

the digital tuning PLL, IF processing with demodulation

and variable-bandwidth IF filtering (ISS),

stop station and quality detection functions, FM

stereo decoding by means of a fully-integrated,

adjustment-free dedicated PLL and, finally, FM

noise blanking. The FM stereo decoder and noise

blanker functions are realized entirely without external

components.

The audio processor section comprises input selectors

for two quasi-differential external sources,

volume control, tone control (bass, mid and treble),

balance and fading control to drive four output

channels. A soft mute function and an RDS

mute function are included to handle source

change as well as RDS AF search without abrupt

changes in the audio level.

Most of the parameters in the front-end section are

I2Cbus-driven and therefore under the control of

the car-radio maker. The I2C bus allows furthermore

the user to realize the full electric alignment

of all the external coils, therefore removing the

need for hand-made or mechanical adjustments.