PT2312E PTC | Alldatasheet
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Technical content
Stereo Audio Processor for Car Audio Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
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.
APPLICATIONS
- Car Audio
- Home Audio System
- Powered Speaker System
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 APPLICATION CIRCUIT 2.2uF 2.2uF 22uF VDD 27n 27n 100n 100n 100n 100n 100n 100n 5.6K 5.6K Front Left Front Right Rear Left Rear Right 10uF 10uF 10uF 10uF Power Amplifier 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF AUDIO 1 AUDIO 2 AUDIO 3 2.2K 2.2K 2.2K 2.2K 2.2K 2.2K L L L R R R Input Surge Protection MCU PT 2312E 2.2uF 2.2uF AUDIO 4 2.2K 2.2K L R 16 17 LIN3 LIN2 LIN1 LIN LOUT BOUT_L BIN_L BIN_R BOUT_R RROUT LROUT RFOUT LFOUT DGND SDA SCLREF VDD AGND TREB_ L TREB_ R RIN ROUT LOUD_R RIN3 RIN2 RIN1 LOUD_L NC NC RIN4 LIN4
PRE1.0 2 September 2009 BLOCK DIAGRAM LIN4 LIN3 LIN2 LIN1 REF LOUDNESS LIN LOUD_L REF BOUT_L BIN_L TREB_L TRE BLE BASS LFOUT LROUT REF REF REF REF LOUDNESS REF TREBLE BASS RROUT RFOUT TREB_R BOUT_R LOUD_R RIN RIN1 RIN2 RIN3 RIN4 REF VDD REF AGND REF SCL SDA DGND I2C DECODERBIAS BIN_R LOUT ROUT Speaker Attenuator With Mute Master Volume Input SW and GAIN INT Ref Loud SW
PRE1.0 3 September 2009 ORDER INFORMATION Valid Part Number Package Type Top Code PT2312E-S 32 Pins, SOP, 300mil PT2312E PIN CONFIGURATION 16 17 REF VDD AGND TREB_ L TREB_ R RIN ROUT LOUD_R RIN3 RIN2 RIN1 LOUD_L LIN3 LIN2 LIN1 LIN LOUT BOUT_L BIN_L BIN_R BOUT_R RROUT LROUT RFOUT LFOUT DGND SDA SCL NC NC RIN4 LIN4 PT2312E
PRE1.0 4 September 2009 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 I 2C data input 31 SCL I I 2C 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.
PRE1.0 5 September 2009 IMPORTANT NOTICE Princeton Technology Corporation (PTC ) reserves the right to make co rrections, 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