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| Preliminary PT12311 Stereo Audio Processor for Car Audio DESCRIPTION The PT12311 is an audio processor designed for versatile application, includes 3 stereo input selector with adjustable gain, master volume control with low frequency loudness compensation, individual output attenuator and tone control. It is a good solution for the car audio signal processing. Due to the high reliability requirement from the car audio business, the PT12311 improves both audio performances and input surge current capability, these causes the PT12311 is the best solution for the cost-effective car audio systems. FEATURES * 3 stereo inputs with gain selection, range from 0dB to +11.25dB in 3.75dB/step * Master volume from 0 dB to -78.75dB in 1.25dB/step * Speaker attenuator for balance and fader, range from 0dB to -38.75dB in 1.25dB/step * Each channel 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 = 5V to 10V) * Low harmonic distortion, low noise APPLICATIONS * Car Audio * Home Audio System * Powered Speaker System APPLICATION CIRCUIT 22uF PT12311 SCL 28 SDA 27 DGND 26 LFOUT 25 RFOUT 24 LROUT 23 RROUT 22 BOUT_R 21 BIN_R 20 BOUT_L 19 BIN_L 18 LOUT 17 LIN 16 LIN1 15 10uF 10uF 10uF 10uF 100n 100n 100n 100n 2.2uF 5.6K Rear Right 5.6K Front Right Front Left 1 REF VDD 2 VDD 3 AGND 27n 27n MCU 4 TREB_L 5 TREB_R 6 RIN 7 ROUT 8 LOUD_R Input Surge Protection L AUDIO 3 R L AUDIO 2 R L AUDIO 1 R 2.2K 2.2K 2.2K 2.2K 2.2K 2.2K 2.2uF 2.2uF 100n 2.2uF 2.2uF 2.2uF 100n 2.2uF 2.2uF 9 RIN3 10 RIN2 11 RIN1 12 LOUD_L 13 LIN3 14 LIN2 Rear Left Power Amplifier Tel: 886-66296288Fax: 886-29174598 http://www.princeton.com.tw2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT12311 BLOCK DIAGRAM Speaker Attenuator With Mute LROUT RROUT REF REF LFOUT RFOUT REF REF TREB_L BIN_L BOUT_L TREBLE TREBLE TREB_R BIN_R BASS Master Volume REF BASS BOUT_R LOUD_L LOUDNESS Loud SW REF LOUDNESS LOUD_R LIN LOUT LIN1 LIN2 LIN3 RIN Input SW and GAIN ROUT Input SW and GAIN RIN1 RIN2 RIN3 REF VDD REF SCL I2C DECODER SDA DGND INT Ref REF REF BIAS AGND PRE1.0 2 September, 2009 PT12311 ORDER INFORMATION Valid Part Number PT12311-S Package Type 28 Pins, SOP, 300mil Top Code PT12311 PIN CONFIGURATION REF VDD AGND TREB_L TREB_R RIN ROUT 1 2 3 4 5 6 7 28 SCL 27 SDA 26 DGND 25 LFOUT 24 RFOUT 23 LROUT LOUD_R 8 RIN3 9 PT12311 22 RROUT 21 BOUT_R 20 BIN_R 19 BOUT_L 18 BIN_L 17 LOUT 16 LIN 15 LIN1 RIN2 10 RIN1 11 LOUD_L 12 LIN3 13 LIN2 14 PRE1.0 3 September, 2009 PT12311 PIN DESCRIPTION Pin Name REF VDD AGND TREB_L TREB_R RIN ROUT LOUD_R RIN3 RIN2 RIN1 LOUD_L LIN3 LIN2 LIN1 LIN LOUT BIN_L BOUT_L BIN_R BOUT_R RROUT LROUT RFOUT LFOUT DGND SDA SCL I/O I I I O I I I I I I I I I O I O I O O O O O I I Description Analog reference voltage (1/2VDD) Supply input voltage Analog ground Left channel input for treble controller Right channel input for treble controller Right channel volume controller input Right channel Input selector output Right channel loudness input Right channel input 3 Right channel input 2 Right channel input 1 Left channel loudness input Left channel input 3 Left channel input 2 Left channel input 1 Left channel volume controller input Left channel Input selector output Left channel input for bass controller Left channel output for bass controller Right channel input for bass controller Right channel output for bass controller Right rear speaker output Left rear speaker output Right front speaker output Left front speaker output Digital ground I2C data input I2C clock input Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 PRE1.0 4 September, 2009 PT12311 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw PRE1.0 5 September, 2009 |
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