PT2347

ANGUS ELECTRONICS CO., LTD Tel: (852) 2345 0540 Fax: (852) 2345 9948 Web Site: www.angus.com.hk Preliminary PT2347 Stereo Audio Processor DESCRIPTION The PT2347 is an audio processor designed for versatile application, it adopts all of functions from successful predecessor- the PT2313L, and it includes 3 stereo input selector with adjustable gain, master volume control with low frequency loudness compensation, individual output attenuator and tone control. In car audio applications, maximum power output of the audio set is measurement on saturated condition, it may not achieve the goal if power amplifier does not have enough gain, therefore, the PT2347 provides extra +10dB voltage gain in final output stage, it is easy to drive the power amplifier into saturated power and eliminates external gain OPAMP. FEATURES Controlled by I²C interface Direct replace the PT2313L with +10dB output gain 3 stereo inputs with gain selection, range from 0dB to +11.25dB in 3.75dB/step Master volume from 0dB to -78.75dB in 1.25dB/step Speaker attenuator for balance and fader, range from 0dB to -38.75dB in 1.25dB/step Each output can be muted individually. Low frequency loudness compensation Bass and Treble control, range from -14dB to +14dB in 2dB/step Wide operation range (VDD = 4V to 10V) Low harmonic distortion Low noise APPLICATIONS Car audio Home audio system Powered speaker system BLOCK DIAGRAM Speaker Attenuator With Mute LROUT RROUT +10dB GAIN LFOUT REF ...