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TDA7469 Datasheet(PDF) 1 Page - STMicroelectronics |
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TDA7469 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 13 page  1/13 TDA7469 June 2004 1FEATURES ■ 2 STEREO INPUT ■ 1 STEREO OUTPUT ■ TREBLE BOOST ■ BASS CONTROL ■ BASS AUTOMATIC LEVEL CONTROL ■ VOLUME CONTROL IN 1dB STEPS ■ MUTE ■ STAND-BY FUNCTION SOFTWARE CONTROLLED ■ ALL FUNCTION ARE PROGRAMMABLE VIA SERIAL BUS 2DESCRIPTION The TDA7469 is a volume tone (bass and treble) pro- cessor for quality audio applications in Low voltage supply portable systems. Bass ALC (Automatic Level Control) function can be adjusted by a dedicated pin. The control of all the functions is accomplished by serial bus. The AC signal setting is obtained by resistor net- works and switches combined with operational ampli- fiers. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are ob- tained. LOW VOLTAGE ANALOG AUDIO PROCESSOR WITH HEADPHONE POWER AMPLIFIER Figure 2. Block Diagram IN1-R ALC IN2-L 0.47 µF 0.47 µF SUPPLY SUPPLY SUPPLY VS GND CREF TREBLE-L D00AU1234 I2C BUS DECODER + LATCHES SCL SDA PVS-L PGND-L PGND-R PVS-R OUT-L OUT-R 220 µF 22 µF TREBLE-R MUX_R MUX_L RB RB BASSI-R BASSO-R x1 x1 0.47 µF TREBLE VOLUME VOLUME +6dB ÷ 0dB +6dB ÷ -63dB +6dB ÷ 0dB 3.3nF +6dB ÷ -63dB TREBLE BASS BASS BASS_ALC CONTROL HALF_WAVE RECTIFIER 25K 25K VREF gm 68nF 3.3nF 68nF 68nF 68nF 5.6K 5.6K 16 Ω or 32 Ω 16 Ω or 32 Ω 220 µF BASSO-L BASSI-L IN2-R 0.47 µF 25K 25K 25K 25K 25K 25K gm IN1-L 0.47 µF REV. 2 Figure 1. Package Table 1. Order Codes Part Number Package TDA7469 SSOP24 TDA746913TR Tape & Reel SSOP24 |
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