PT2390-S Princeton Technology Corp., PT2390-S Datasheet

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PT2390-S

Manufacturer Part Number
PT2390-S
Description
Echo IC with Built-in Microphone Amplifier & Output Mixer
Manufacturer
Princeton Technology Corp.
Datasheet
Tel: 886-2-29162151
Princeton Technology Corp.
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT2390
Echo IC with Built-in Microphone Amplifier & Output Mixer
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 assign-
ments 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

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PT2390-S Summary of contents

Page 1

... 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 assign- ments and application circuit are optimized for easy PCB Layout and low cost effectiveness. ...

Page 2

... CLK_IN 12 13 LPF1_IN LPF1_OUT 14 Ref. No. 2390 v1.1 REF REF REF REF + + _ + REF CONTROL UNIT REF REF + _ 2 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2390 28 MIC2_IN + - 27 MIC2_OUT 26 MIX2_IN _ + REF _ MIX2_OUT 25 + REF + 24 ROUT _ RIN REF CC1 22 CC0 21 OP1_IN 20 A/D OP1_OUT ...

Page 3

... PT2390 3 Written July 1999 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2390 MIC2_IN MIC2_OUT MIX2_IN MIX2_OUT ROUT RIN CC1 CC0 OP1_IN OP1_OUT OP2_IN OP2_OUT LPF2_IN LPF2_OUT ...

Page 4

... Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2390 ...

Page 5

... 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 8 Written July 1999 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2390 ...

Page 6

... 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 PT2390 ...

Page 7

... Ref. No. 2390 v1 Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2390 Written July 1999 ...

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