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 PT2390 DESCRIPTION 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 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. PT2390 Echo IC with Built-in Microphone Amplifier & Output Mixer BLOCK DIAGRAM 1 REF _ 2 MIX1_IN 3 + + 27 MIC2_OUT _ + + REF REF _ + _ ECHO_IN 4 + REF 5 LIN 6 REF REF + + _ + REF 23 RIN _ VDD 24 ROUT _ _ REF REF REF 8 9 AGND 10 DGND 11 MIX2_OUT REF + VOCCON 7 25 + + LOUT 26 MIX2_IN + MIC1_OUT 28 MIC2_IN REF _ MIC1_IN 21 CC0 CONTROL UNIT ½ Vcc 22 CC1 20 OP1_IN A/D 19 OP1_OUT 18 OP2_IN D/A 17 OP2_OUT CLK_IN 12 13 LPF1_OUT 14 REF _ Ref. No. 2390 v1.1 + LPF1_IN REF + _ 16 LPF2_IN 15 LPF2_OUT 2 Written July 1999 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. Echo IC with Built-in Microphone Amplifier & Output Mixer PIN CONFIGURATION MIC1_IN 1 28 MIC2_IN MIC1_OUT 2 27 MIC2_OUT MIX1_IN 3 26 MIX2_IN ECHO_IN 4 25 MIX2_OUT LOUT 5 24 ROUT LIN 6 23 RIN VOCCON 7 22 CC1 VDD 8 21 CC0 REF 9 20 OP1_IN AGND 10 19 OP1_OUT DGND 11 18 OP2_IN CLK_IN 12 17 OP2_OUT LPF1_IN 13 16 LPF2_IN LPF1_OUT 14 15 LPF2_OUT PT2390 Ref. No. 2390 v1.1 3 Written July 1999 PT2390 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. Echo IC with Built-in Microphone Amplifier & Output Mixer PT2390 PIN DESCRIPTION Pin N ame I/O Description Pin N o. MIC 1_IN I Microphone 1 Amplifier Input 1 MIC 2_O UT O Microphone 1 Amplifier O utput 2 MIX1_IN I Mixer 1 Input 3 EC HO _IN I Echo Input 4 LO UT O Left C hannel O utput 5 LIN I Left C hannel Input 6 VO C C O N I Auto- Vocal C hanger C ontrol Terminal 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. 7 VDD - Power Supply 8 REF - Reference Voltage C onnects to 47 µf to GN D 9 AGN D - Analog Ground 10 DGN D - Digital Ground 11 C LK _IN I System C lock Input 12 LPF1_IN I Low- Pass Filter 1 Input 13 LPF1_O UT O Low- Pass Filter 1 O utput 14 LPF2_IN I Low- Pass Filter 2 Input 15 LPF2_O UT O Low- Pass Filter 2 O utput 16 O P2_O UT O O P Amplifier 2 O utput 17 O P2_IN I O P Amplifier 2 Input 18 O P1_O UT O O P Amplifier 1 O utput 19 O P1_IN I O P Amplifier 1 Input 20 CC0 - C urrent C ontrol 0 21 CC1 - C urrent C ontrol 1 22 RIN I Right C hannel Input 23 RO UT O Right C hannel O utput 24 MIX2_O UT O Mixer 2 O utput 25 MIX2_IN I Mixer 2 Input 26 MIC 2_O UT O Microphone 2 Amplifier O utput 27 MIC 2_IN I Microphone 2 Amplifier Input 28 Ref. No. 2390 v1.1 4 Written July 1999 8 1µF + MIC IN 0.01µF 2.7K 1 TO A 50K ECHO VOL 2 1M 47K 1 3 3 2 + 15K 0.1µF 220µF 3900p 15K 10K 47µF + + 1µF 560p + + 10µF + 10µF + 10µF RCA-JACK 10µF 10p *5K 5V IN_L OUT_L MIC VOL1 1.5K PT2390 LPF2_OUT LPF2_IN LPF1_IN 13 LPF1_OUT OP2_OUT CLK_IN 12 14 OP2_IN DGND OP1_OUT OP1_IN CC0 CC1 RIN ROUT MIX2_OUT MIX2_IN MIC2_OUT MIC2_IN 11 AGND REF 9 10 VDD VOCCON LIN 8 7 6 LOUT ECHO_IN 4 5 MIX1_IN MIC1_OUT MIC1_IN 3 2 1 15 16 17 18 19 20 21 22 23 24 25 26 27 28 B + 560p 10K 0.1µF 3K 15K 15K IN_R 10µF FEEDBACK 0.01µF 3900p RCA-JACK OUT_R MIC VOL2 4.7K 10µF 1µF 50K(SVR) 0.1µF 0.1µF 0.1µF A 1µF + 4.7K + + Ref. No. 2390 v1.1 + + + A 2 1 3 DGND 1M 47K AGND1 AGND2 MIC IN 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 Written July 1999 PT2390 APPLICATION CIRCUIT 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. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. Echo IC with Built-in Microphone Amplifier & Output Mixer PT2390 DGND 1 1M 47K 3 + FEEDBACK 3K 560p B 15 PT2390 16 LPF2_IN LPF2_OUT LPF1_IN 13 LPF1_OUT OP2_OUT CLK_IN 17 18 OP2_IN DGND 11 12 3900p 560p + 15K 10p 10µF 15K 10K 47µF 0.1µF 220µF *5K RCA-JACK 5V TO A 1 50K ECHO VOL 1µF 0.01µF 2 + 2.7K 1M 47K MIC IN 1µF 50K(SVR) 0.01µF 3900p 15K 15K 10K 0.1µF 0.1µF 20 19 OP1_IN OP1_OUT AGND REF + + 10µF 1 3 3 2 IN_L MIC VOL1 OUT_L + 10µF 1.5K 1µF + 4.7K A + 9 10 CC0 VDD VOCCON 7 8 CC1 22 21 0.1µF 0.1µF 23 RIN LIN 6 24 25 ROUT MIX2_OUT ECHO_IN 5 4 LOUT 26 27 MIC2_OUT MIX2_IN MIX1_IN MIC1_OUT 3 2 MIC2_IN 1 MIC1_IN AUTO VOCAL CHANGER SENSITIVITY 0.1µF 100K VR 28 A _ + 1N4148 470K + + + 14 IN_R RCA-JACK OUT_R 10µF 2 MIC VOL2 4.7K 10µF 4 1/2LM358 1µF C945 10K 1M 0.1µF 8 200K 5V 5V 5V + + + AUTO VOCAL CHANGER DETAILED CIRCUIT + 4.7µF AGND1 MIC IN AGND2 AUTO-VOCAL CHANGER APPLICATION CIRCUIT 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 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. Echo IC with Built-in Microphone Amplifier & Output Mixer ORDER INFORMATION Ref. No. 2390 v1.1 Valid Part N umber Package PT2390 28 Pins, DIP (300 mil) PT2390- S 28 Pins, SO (300 mil) 10 Written July 1999 PT2390