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TDA9855 pdf datasheet
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I2C-bus controlled BTSC stereo/SAP decoder and audio processor.
The composite input signal is fed to the input level
adjustment stage. In order to compensate tolerances of
the FM demodulator which supplied the composite input
signal, the TDA9855 provides an input level adjustment
stage. The control range is from -3.5 to +4.0 dB in steps of
0.5 dB. The subaddress control 3 of Tables 5 and 6 and
the level adjust setting of Table 22 allows an optimum
signal adjustment during the set alignment in the
production line. This value has to be stored in a
non-volatile memory. The maximum input signal voltage is
2 V (RMS).
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