TDA7501 Datasheet, PDF (8/18 Pages) STMicroelectronics – LINE-DRIVER FOR DIGITAL CARRADIO SIGNAL PROCESSOR

TDA7501
DESCRIPTION OF THE OUTPUT PART
The TDA7501 has 6 independent outputstage
with volume control. The first 4 (main) outputs
have an input selector which allows to select be-
sides the DAC-outputs CD-direct or Phone/Navi-
gation-mix. In addition one can mix the SPKR1
with Phone/Navigationso that traffic or navigation
announcements can bypass the DSP (see figure
5).
The TDA7500 CODEC outputs have a maximum
output voltage of 0.5Vrms . To obtain 4Vrms , (in
the dual supply mode only) the signal is first am-
plified to have a reference amplitude of 2V rms.
The following volume stage offers up to 15dB
gain which gives along with the programmable
6dB gain in the output-stage enough overdrive
capability. To achieve the maximum output swing
of 4Vrms the device must be supplied with an ad-
ditional supply of 12V. With a single supply (V_dd
=V_CC = 8.3V) 2.8Vrms are obtained at the output
at maximum.
Figure 5. Output part.
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