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| PT2312E Stereo Audio Processor for Car Audio DESCRIPTION The PT2312E is an audio processor designed for versatile application, includes 4 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 audio business, the PT2312E improves both audio performances and input surge current capability, these causes the PT2312E is the best solution for the cost-effective audio systems. FEATURES * 4 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=4V to 10V) * Improved and replace PT2312 and PT2312A APPLICATIONS * Car Audio * Home Audio System * Powered Speaker System APPLICATION CIRCUIT 22uF PT2312E 1 REF SCL 32 SDA 31 DGND 30 LFOUT 29 RFOUT 28 LROUT 27 RROUT 26 BOUT_R 25 BIN_R 24 BOUT_L 23 BIN_L 22 LOUT 21 LIN 20 LIN1 19 LIN2 18 LIN3 17 10uF 10uF 10uF 10uF 100n 100n 100n 100n 2.2uF 5.6K Rear Left Front Right Front Left VDD 2 VDD 3 AGND MCU Input Surge Protection L AUDIO 4 R L AUDIO 3 R L AUDIO 2 R L AUDIO 1 R 2.7n 2.2K 2.2K 2.2K 2.2K 2.2K 2.2K 2.2K 2.2K 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 100n 2.7n 2.2uF 4 NC 5 TREB_L 6 TREB_R 7 RIN 8 ROUT 9 LOUD_R 10 RIN4 11 RIN3 12 RIN2 13 RIN1 14 NC 15 LOUD_L 16 LIN4 100n 5.6K Rear Right Power Amplifier Tel: 886-66296288Fax: 886-29174598 http://www.princeton.com.tw2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2312E BLOCK DIAGRAM Speaker Attenuator With Mute LROUT RROUT REF REF LFOUT RFOUT REF TREB_L BIN_L BOUT_L REF TREBLE TREBLE TREB_R BIN_R BOUT_R BASS REF Master Volume Loud SW REF BASS LOUD_L LOUDNESS LOUDNESS LOUD_R LIN LOUT LIN4 LIN3 LIN2 LIN1 RIN Input SW and GAIN ROUT RIN4 RIN3 RIN2 RIN1 REF VDD REF SCL INT Ref REF REF BIAS I2C DECODER SDA DGND AGND V1.0 2 January 2010 PT2312E ORDER INFORMATION Valid Part Number PT2312E-S Package Type 32 Pins, SOP, 300mil Top Code PT2312E PIN CONFIGURATION REF 1 VDD 2 AGND 3 NC 4 TREB_L TREB_R 5 6 32 SCL 31 SDA 30 DGND 29 LFOUT 28 RFOUT 27 LROUT 26 RROUT RIN 7 ROUT 8 LOUD_R 9 RIN4 10 RIN3 11 RIN2 12 RIN1 13 NC 14 LOUD_L 15 LIN4 16 PT2312E 25 BOUT_R 24 BIN_R 23 BOUT_L 22 BIN_L 21 LOUT 20 LIN 19 LIN1 18 LIN2 17 LIN3 V1.0 3 January 2010 PT2312E PIN DESCRIPTION Pin Name I/O Description Pin No. REF Reference voltage 1 VDD Supply input 2 AGND Analog ground 3 NC No Connect 4 TREB_L I L-CH treble input 5 TREB_R I R-CH treble input 6 RIN I R-CH volume input 7 ROUT O R-CH mux output 8 LOUD_R I R-CH loudness input 9 RIN4 I R-CH input 4 10 RIN3 I R-CH input 3 11 RIN2 I R-CH input 2 12 RIN1 I R-CH input 1 13 NC No Connect 14 LOUD_L I L-CH loudness input 15 LIN4 I L-CH input 4 16 LIN3 I L-CH input 3 17 LIN2 I L-CH input 2 18 LIN1 I L-CH input 1 19 LIN I L-CH volume input 20 LOUT O L-CH mux output 21 BIN_L I L-CH bass input 22 BOUT_L O L-CH bass output 23 BIN_R I R-CH bass input 24 BOUT_R O R-CH bass output 25 RROUT O Right rear output 26 LROUT O Left rear output 27 RFOUT O Right front output 28 LFOUT O Left front output 29 DGND Digital ground 30 SDA I I2C data input 31 SCL I I2C clock input 32 * Pin 4 in the PT2312 and PT2312A is for "CODE" function and always pull-high by external connection, the PT2312E modified to internally pull-high so pin 4 becomes to NC status. V1.0 4 January 2010 PT2312E 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 V1.0 5 January 2010 |
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