Princeton Technology Corp. DESCRIPTION FEATURES APPLICATIONS. Echo Processor IC

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1 DESCRIPTION is an echo audio processor IC utilizing CMOS Technology which is equipped with ADC and DAC, high sampling frequency and an internal memory of 44K Digital processing is used to generate the delay time, it also features an internal VCO circuit in the system clock, thereby, making the frequency easily adjustable. boast of very low distortion (THD<0.5%) and very low noise (No<-90dBV), thus producing high quality audio output. The pin assignments and application circuit are optimized for easy PCB layout and cost saving advantage. FEATURES CMOS Technology Least External Components Auto Reset Function Low Noise, No<-90dBV Typical Low Distortion, THD<0.5% Typical External Adjustable VCO Available in 16 pins, DIP or SO package APPLICATIONS Video Tape Recorder Video Compact Disk Television CD Player Car Stereo KARAOKE Mixer Electronic Musical Instrument Audio Equipment with Echo Processor v1.1 Page 1 Updated June 1998

2 BLOCK DIAGRAM L P F 1 -IN L P F 1 -O U T LP F 2 -O U T LPF2-IN OP2-O UT OP2-IN OP1-IN OP1-OUT CC0 CC K 4.7K MOD _ LPF1 COMP LPF2 DEM 1/2 Vcc DI DO0 DO1 AUTO RESET MO MI CLOCK 44K Bits RAM VCO VC C RE F AG ND D G N D CL K_ O VC O PIN CONFIGURATION VCC REF AGND DGND CLK_O VCO CC1 CC LPF1-IN LPF1-OUT LPF2-OUT LPF2-IN OP2-0UT OP2-IN OP1-IN OP1-OUT v1.1 Page 2 Updated June 1998

3 PIN DESCRIPTION Pin Name I/ O D escription PinNo. VCC - Analog SupplyVoltahe Input 1 REF - Analog Reference Voltage (=1/2Vcc) 2 AGND - Analog Ground 3 DGND - Digital Ground 4 CLK_O O System Clock Output Pin 5 VCO I FrequencyAdjustment Pin 6 CC1 - Current Control 1 7 CC0 - Current Conrol 0 8 OP1-OUT OP1-IN OP2-IN OP2-OUT O I I O OP Amplifier 1 Output This pincanbe used as Moodulated Integrator byconnecting Capacitor. OP Amplifier 1 Input This pincanbe used as Demodulated Integrator byconnecting Capacitor. OP Amplifier 2 Input This pincanbe used as Demodulated Integrator byconnecting Capacitor. OP Amplifier 2 Output This pincanbe used as a Modulated Integrator byconnecting Capacitor LPF2-IN I Low Pass Filter 2 Input Pin 13 LPF2-OUT O Low Pass Filter 2 Output Pin 14 LPF1-OUT O Low Pass Filter 1 Output Pin 15 LPF1-IN I Low Pass Filter 1 Input Pin v1.1 Page 3 Updated June 1998

4 FUNCTIONAL DESCRIPTION Echo Mode Please refer to the diagram below: Vout Vin Low Pass Filter A/D Delay Time Circuit D/A Low Pass Filter Auto Reset Function The waveform of the signal during Power On is given below: Power ON Reset Time = 400 ms v1.1 Page 4 Updated June 1998

5 ABSOLUTE MAXIMUM RATINGS (Ta=25 o C, unless otherwise specified) Symbol Description Limits Unit Vcc Icc Pd Topr Tstg SupplyVoltage 6. 5 V SupplyCurrent 100 ma Power Dissipation 1. 7 W OperationTemperature -20 to 75 o C Storage Temperature -25 to 125 o C RECOMMENDED OPERATING CONDITIONS Symbol Vcc fck Parameter Limits M in. T yp. Max. Units SupplyVoltage V Clock Frequency 4 5 MHz v1.1 Page 5 Updated June 1998

6 AC CHARACTERISTICS (Unless otherwise stated: Vcc=5.0 V, fin=1khz, Vi=100mVrms, fck=4mhz, Ta=25 o C) Symbol Vcc Icc Gv Vomax THD No PSRR Parameter Supply Voltage Supply Current Voltage Gain Maximum Output Voltage Output Distortion Output Noise Voltage Power Supply Rejection Ratio T est Condition M in. T yp. Max. Unit V ma RL=47K Ohms db THD=10% Vrms Filter=Audio % Filter=A-weighting dbv Vcc=-20dBV(0.1Vrms) f=100hz db v1.1 Page 6 Updated June 1998

7 ECHO APPLICATION CIRCUIT 5V 100uF 20K 47uF R uF 5.6K 3900pF 560pF 15K 4.7uF 10uF 0.01uF 50K 560pF 15K 4.7uF 0.082uF AGND DGND Input 100K 4.7K 10uF 3300pF Output Note: External Resistor having a value of 10 K Ohms to 50 K Ohms may be used. The recommended Resistor Value ( R ) is 10 K Ohms. When the value of the Resistor ( R ) increases, the range of the Delay Time also increases. v1.1 Page 7 Updated June 1998

8 SURROUND/DELAY APPLICATION CIRCUIT 5600pF 15K 4.7uF Input 100K 5V 100uF 47uF R pF 27.K 15K 0.01uF 10uF 560pF 15K AGND 15K DGND Output 5600pF Note: Please refer to Table 1 for the Resistor/Delay Time values v1.1 Page 8 Updated June 1998

9 TABLE 1: RESISTOR/DELAY TIME VALUES R fck td 27.6K 21.3K 17.2K 14.3K 12.1K 10.5K 9.2K 8.2K 2.0M 2.5M 3.0M 3.5M 4.0M 4.5M 5.0M 5.5M 342ms 273ms 228ms 196ms 171ms 151ms 136.6ms 124.1ms T HD 1.0% 0.8% 0.63% 0.53% 0.46% 0.41% 0.36% 0.33% R fck td 7.2K 6.4K 5.8K 5.4K 4.9K 4.5K 4K 3.4K 6.0M 6.5M 7.0M 7.5M 8.0M 8.5M 9.0M 10M 113.7ms 104.3ms 97.1ms 92.2ms 86.3ms 81ms 75.9ms 68.1ms T HD 0.29% 0.27% 0.25% 0.25% 0.23% 0.22% 0.21% 0.19% R fck td 2.8K 2.4K 2K 1.67K 1.47K 1.28K 1.08K M 12M 13M 14M 15M 16M 17M 18M 61.6ms 56.6ms 52.3ms 48.1ms 45.8ms 43ms 40.6ms 38.5ms T HD 0.18% 0.16% 0.15% 0.15% 0.15% 0.15% 0.14% 0.14% R fck td 19M 20M 21M 22M 36.6ms 34.4ms 32.6ms 31.3ms T HD 0.14% 0.13% 0.13% 0.13% Note: R = External Resistor (Ohms), please refer to Surround/Delay Time Application Circuit fck = Clock Frequency (Hz) td = Delay Time THD = Total Harmonic Distortion v1.1 Page 9 Updated June 1998

10 ORDER INFORMATION Part Number S Package 16 Pins, DIP (300 mil) 16 Pins, SO Package (300 mil) PACKAGE INFORMATION 16 Pins, DIP Package Dimension in Symbol Mil A 750 B 65 C 55 v1.1 Page 10 Updated June 1998

11 16 Pins, SO Package Symbol Min A.36 A B.33 C.18 D 0.08 E.39 Dimensions Millimeter Nom in Max Min Dimensions Inches Nom in Max A e H L y θ 0 O - 8 O 0 O - 8 O Note: 1. Controlling Dimension: Inch 2. Lead Frame Material: Copper After soldering plating lead thickness will be max. 4. Dimension D does not include mold flash, protrusions or gate burrs. 5. Dimension E does not include interlead flash or protrusions. 6. Tolerance: ±0.010 unless otherwise specified. 7. Otherwise dimension follow acceptable spec. v1.1 Page 11 Updated June 1998