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| Princeton Technology Corp. Tone Control Subwoofer Low Pass Filter IC DESCRIPTION Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2350 PT2350 is a tone control subwoofer cross-over low pass filter chip utilizing CMOS Technology. It features a tone control range of + 10dB (50Hz, 4 KHz) and subwoofer low pass filter of the second order Sallen Key Design. The roll-off point can be adjusted by changing the value of the external capacitor. Pin assignments and application circuits are optimized for easy PCB Layout and cost saving advantages. FEATURES !CMOS Technology !2 - Channel Input !3 - Channel Output (Including 1 stereo Output and Subwoofer Output) !Low Total Harmonic Distortion (THD<0.01%, Subwoofer THD<0.2%) !High S/N Ratio (S/N Ratio <-87dB, A-weighting) !Least External Components !Adjustment of Frequency response by changing the value of the external component !Single Power Supply: 3 to 8.5 Volts !Available in 20 pins, DIP or SO Package APPLICATIONS !Multi-Media 3D Satellite Speaker and Subwoofer System !Car Audio !Audio Equipment !Sound Card !Other Electrical Audio Equipment Ref. No. 2350 v1.1 1 Written July 1999 Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Tone Control Subwoofer Cross-Over Low Pass Filter IC PIN CONFIGURATION PT2350 LIN LB1 LB2 LB3 LT1 LT2 LOUT VREF C2 Vss 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 RIN RB1 RB2 RB3 RT1 RT2 ROUT SOUT C1 VDD PT2350 Ref. No. 2350 v1.1 2 Written July 1999 Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Tone Control Subwoofer Cross-Over Low Pass Filter IC APPLICATION CIRCUIT PT2350 2 10KVR (A) 1 4.7uF 4.7uF Left Channel Bass Control VR CL1 0.05uF 3 100K (B) VR 2 3 2 1 10K 100K (B) VR Left Channel Treble Control VR 1 CH1 0.005uF + 4.7uF/16V 0.15uf PT2350 8.2VZD Notes: 1. If you use the above values: Treble Control Range = 4KHz + 10 dB Bass Control Range = 50 Hz + 10 dB Subwoofer Output Roll-Off Point is at -3dB at 130Hz Slope Rate = -12dB/oct 2. It is recommended that you use Mylar or Metal Capacitors for better audio quality. 3. Please do not connect 0.1F or any by-pass capacitor between the GND and VDD. Ref. No. 2350 v1.1 3 + 4.7uF/16V C1 + Left Channel Output + RIN LIN RB1 LB1 RB2 LB2 RB3 LB3 RT1 LT1 RT2 LT2 ROUT LOUT VREF SOUT C1 C2 VDD Vss Right Channel Output 4.7uF/16V 0.068uF Subwoofer Output 4.7uF/16V 12V 220Ohms 100uF + Left Channel Input 3 + 2 1 Right Channel Input 3 10K VR (A) Right Channel Bass Control VR 10K 3 2 1 100K (B) VR CL2 0.05uF 3 2 1 Right Channel Treble Control VR 0.005uF CH2 100K (B) VR Written July 1999 Princeton Technology Corp. Tone Control Subwoofer Low Pass Filter IC ORDER INFORMATION Valid Part N umber PT2350 PT2350- S Package Type 20 pins, DIP (300 mil) 20 pins, SO (300 mil) Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2350 Ref. No. 2350 v1.1 4 Written July 1999 |
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