INPUTS:

- QUASI DIFFERENTIAL STEREO INPUT

FOR CD

- DIFFERENTIAL STEREO INPUTS FOR

PHONE, NAVIGATION, FM, AM

- SINGLE-ENDED INPUT FOR CASSETTE

- FOUR INDEPENDENT INPUT MULTIPLEXER

AND GAIN STAGES

- ENVELOPE-DETECTOR FOR

AM-NOISEBLANKING

- MIXING OF PHONE AND NAVIGATION

- DC-CONNECTION TO DSP

- DUAL MPX INPUTS

OUTPUTS:

- 6 OUTPUT CHANNELS WITH INDEPENDENT

VOLUME CONTROL

- 4 MAIN OUTPUT CHANNELS WITH ADDITIONAL

INPUT SELECTOR FOR PHONE AND/OR

NAVIGATION OR CD

- OUTPUTS FOR UP TO 4V rms

- AC-CONNECTION FROM DSP

DIGITAL CONTROL:

- SPI-BUS OR I

(SELECTABLE)

- DIRECT MUTE FOR THE OUTPUT STAGES

AND/OR HIGH IMPEDANCE MPX MUTE

DESCRIPTION

The Linedriver handles all analog input- and out-

put-signals for the Digital Carradio Signal Proces-

sor TDA7501. The device contains four inde-

pendent input multiplexers to select the sources

for the DSP’s four AD-converters. Four additional

gain stages allow an adaptation to run the ADCs

in best S/N condition.

The six outputs have independent volume stages

with a large dynamic range. Using a 12V-supply

the outputs are able to drive up to 4Vrms .

This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.

April 1999

®

BLOCK DIAGRAM

TQFP44

TDA7501

LINE-DRIVER FOR DIGITAL CARRADIO

SIGNAL PROCESSOR

PRODUCT PREVIEW

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