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| Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Echo IC with Built-in Microphone Amplifier & Output Mixer DESCRIPTION PT2390 PT2390 is a digital echo IC utilizing CMOS Technology. Microphone Amplifier, Output Mixer, internal 44K RAM and Vocal Switch are all integrated in a single chip to provide a digital echo IC of the the highest standard. Very low distortion and high S/N Ratio qualities, not to mention the built-in VCO feature which eliminates the need for an external crystal oscillator are just some of the features of PT2390. Pin assignments and application circuit are optimized for easy PCB Layout and low cost effectiveness. FEATURES * * * * * * * CMOS Technology Least External Component 5V Power Supply 2 Microphone Amplifier and KARAOKE Automatic Vocal Changer Built-in 44K RAM Built-in VCO, eliminating the need for a crystal oscillator Low Total Harmonic Distortion : Microphone Pre-Amplifier <0.09% (typ.) : Echo Processor < 0.5% (typ.) * High S/N Ratio : Microphone Pre-Amplifier > 85 (no - weighting) : Echo Processor > 80 dB (no - weighting) * Available in 28-pin, DIP or SO Package APPLICATIONS * * * * * DVD, VCD KARAOKE VCR Mini Compo Other Audio Equipments Ref. No. 2390 v1.1 1 Written July 1999 Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Echo IC with Built-in Microphone Amplifier & Output Mixer BLOCK DIAGRAM PT2390 MIC1_IN 1 _ + REF REF 28 MIC2_IN + 27 MIC2_OUT MIC1_OUT 2 _ + REF + REF LOUT 5 + REF REF REF ++ VOCCON 7 VDD REF AGND DGND 8 9 10 11 REF REF 1/2 Vcc CONTROL UNIT CLK_IN 12 LPF1_IN 13 + _ REF REF + _ 16 LPF2_IN LPF1_OUT 14 Ref. No. 2390 v1.1 2 Written July 1999 + + _ LIN 6 _ + _ ECHO_IN 4 _ 25 MIX2_OUT + REF + _ 24 ROUT 23 RIN REF 22 CC1 21 CC0 20 OP1_IN _ MIX1_IN 3 + 26 MIX2_IN _ A/D 19 OP1_OUT 18 OP2_IN D/A 17 OP2_OUT 15 LPF2_OUT Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Echo IC with Built-in Microphone Amplifier & Output Mixer PIN CONFIGURATION MIC1_IN MIC1_OUT MIX1_IN ECHO_IN LOUT LIN VOCCON VDD REF AGND DGND CLK_IN LPF1_IN LPF1_OUT PT2390 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 MIC2_IN MIC2_OUT MIX2_IN MIX2_OUT ROUT RIN CC1 CC0 OP1_IN OP1_OUT OP2_IN OP2_OUT LPF2_IN LPF2_OUT PT2390 Ref. No. 2390 v1.1 3 Written July 1999 Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Echo IC with Built-in Microphone Amplifier & Output Mixer PIN DESCRIPTION Pin N ame MIC 1_IN MIC 2_O UT MIX1_IN EC HO _IN LO UT LIN I/O I O I I O I Description Microphone 1 Amplifier Input Microphone 1 Amplifier O utput Mixer 1 Input Echo Input Left C hannel O utput Left C hannel Input Auto- V cal C hanger C ontrol Terminal o When this pin is pulled "HIGH" (VDD), RIN is connected to RO UT and LIN is connected to LO UT. When this pin is pulled "LO W" (GN D), LIN is connected to RO UT and LO UT. Power Supply Reference V ltage o C onnects to 47 to GN D f Analog Ground Digital Ground System C lock Input Low- Pass Filter 1 Input Low- Pass Filter 1 O utput Low- Pass Filter 2 Input Low- Pass Filter 2 O utput O P Amplifier 2 O utput O P Amplifier 2 Input O P Amplifier 1 O utput O P Amplifier 1 Input C urrent C ontrol 0 C urrent C ontrol 1 Right C hannel Input Right C hannel O utput Mixer 2 O utput Mixer 2 Input Microphone 2 Amplifier O utput Microphone 2 Amplifier Input 4 Written July 1999 PT2390 Pin N o. 1 2 3 4 5 6 VO C C O N I 7 VDD REF AGN D DGN D C LK _IN LPF1_IN LPF1_O UT LPF2_IN LPF2_O UT O P2_O UT O P2_IN O P1_O UT O P1_IN CC0 CC1 RIN RO UT MIX2_O UT MIX2_IN MIC 2_O UT MIC 2_IN Ref. No. 2390 v1.1 I I O I O O I O I I O O I O I 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 APPLICATION CIRCUIT MIC IN 3 2 MIC VOL2 1 A 10F 10F RCA-JACK IN_R OUT_R 2 2 47K MIC VOL1 MIC1_OUT MIX1_IN ECHO_IN MIX2_OUT 25 1 MIC1_IN MIC2_OUT 27 26 MIC2_IN 28 1M 1 3 + 10F 4 MIX2_IN 1F 1 5V 8 IN_L 6 7 0.01F VDD CC0 21 + 10F LIN VOCCON CC1 22 RIN 23 0.1F 0.1F Princeton Technology Corp. 50K ECHO VOL + *5K 10 + AGND OP1_OUT 19 REF OP1_IN 0.1F 220F 11 47F DGND OP2_IN OP2_OUT LPF2_IN 16 17 18 10K 13 12 CLK_IN LPF1_IN 10p 14 B 15 LPF1_OUT LPF2_OUT 15K TO A 10F 3900p 560p + 15K PT2390 1F 50K(SVR) FEEDBACK Echo IC with Built-in Microphone Amplifier & Output Mixer Note: * = You can adjust the 5K Variable Resistor value in order to change the Oscillator Frequency. The Oscillator waveform can be measured from Pin No.12. It must be kept in mind that the probe's capacitor can cause erroneous oscillator waveform measurement. A 4.7K 1.5K + 9 20 + + RCA-JACK 0.1F 0.1F 15K 10K 560p 15K 3900p AGND1 + + + + 2 OUT_L 2.7K 3 + 10F 5 LOUT ROUT 24 + Ref. No. 2390 v1.1 + 1F 1F 47K 1M 4.7K MIC IN 3 3K DGND 0.01F AGND2 8 Written July 1999 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2390 Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Echo IC with Built-in Microphone Amplifier & Output Mixer AUTO-VOCAL CHANGER APPLICATION CIRCUIT AGND1 AGND2 MIC IN PT2390 + 4.7F AUTO VOCAL CHANGER DETAILED CIRCUIT 47K 1M C945 5V 1M MIC VOL2 4.7K 2 3 1 OUT_R IN_R RCA-JACK 10K 3900p DGND 4 1/2LM358 15K 0.1F 0.1F 0.1F + _ 28 27 26 25 A 24 23 22 21 20 18 B 19 CC1 CC0 OP1_OUT MIX2_OUT OP2_OUT 17 16 AUTO VOCAL CHANGER SENSITIVITY LPF2_OUT MIC2_OUT ROUT OP1_IN OP2_IN MIC2_IN LPF2_IN MIX2_IN 100K VR RIN 15 0.1F 470K 10 11 12 13 14 8 1 2 3 4 5 6 7 9 LPF1_OUT MIC1_OUT ECHO_IN VOCCON LPF1_IN MIC1_IN MIX1_IN CLK_IN DGND AGND LOUT VDD REF LIN + 560p PT2390 + 15K TO A 10F 3900p 15K 1N4148 47F 1.5K 1F + + 10F + MIC VOL1 4.7K OUT_L RCA-JACK IN_L *5K 5V 0.1F 220F + 10F A 10K 2 3 1 3 1 MIC IN Guidelines in using this Application Circuit: 1. IN_R must be connected to Human Vocal Input. 2. IN_L must be connected to KARAOKE Music Note: * = You can adjust the 5K Variable Resistor value in order to change the Oscillator Frequency. The Oscillator waveform can be measured from Pin No.12. It must be kept in mind that the probe's capacitor can cause erroneous oscillator waveform measurement. Ref. No. 2390 v1.1 9 Written July 1999 + 1F 0.01F 2.7K 50K ECHO VOL 47K 1M 2 10p 1F 50K(SVR) 0.1F 0.1F 5V 8 560p + FEEDBACK 10F 15K 1F 10F 10K 3K 0.01F 5V 200K + + + + + + Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Echo IC with Built-in Microphone Amplifier & Output Mixer ORDER INFORMATION V lid Part N umber a PT2390 PT2390- S Package 28 Pins, DIP (300 mil) 28 Pins, SO (300 mil) PT2390 Ref. No. 2390 v1.1 10 Written July 1999 |
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