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PT2399 Echo Processor IC
DESCRIPTION
The PT2399 is a single chip echo processor IC utilizing CMOS technology. Which accept analog audio input signal, a high sample rate ADC transfer the analog signal into a bit stream then storage to internal 44Kbit RAM, after processing the bit stream will de-modulate by DAC and lowpass filter. Overall delay time is determined by internal VCO clock frequency, and user can easy to change the VCO frequency by changing the external resistance. The PT2399 performs low distortion (THD<0.5%@0.5Vrms) and low noise (No<-90dBV) characteristic for audio purpose, and pin arrangement and application circuit are optimized for easy PCB layout and cost saving advantage.
FEATURES
* * * * * * CMOS technology Least external components Auto reset Function prevent POP noise Low noise, SNR better than 90dB (typical) Low distortion, THD= 0.5%(typical) User adjustable VCO clock frequency.
APPLICATIONS
* * * * * * KARAOKE Mixer CD/DVD Player/Recorder Multimedia TV Car Entertainment System Music Instrument effecter Electronics Toy
BLOCK DIAGRAM
Tel: 886-66296288Fax: 886-29174598 http://www.princeton.com.tw2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PT2399
APPLICATION CIRCUIT
ECHO
Note: External Resistor having a value of 10 K to 50 K may be used. The recommended Resistor Value(R) is 10 K. When the value of the Resistor (R) increases, the range of the Delay Time also increases.
SURROUND/DELAY
Note: Please refer to Table 1 for the Resistor/Delay Time values.
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PT2399
ORDER INFORMATION
Valid Part Number PT2399 PT2399S PT2399-SN Package Type 16 Pins, DIP, 300mil 16 Pins, SOP, 300mil 16 Pins, SOP, 150mil Top Code PT2399 PT2399S PT2399-SN
PIN CONFIGURATION
PIN DESCRIPTION
Pin Name VCC REF AGND DGND CLK_O VCO CC1 CC0 OP1-OUT OP1-IN OP2-IN OP2-OUT LPF2-IN LPF2-OUT LPF1-OUT LPF1-IN I/O O I O I I O I O O I Description Analog supply voltage input Analog reference voltage (1/2VCC) Analog ground Digital ground System clock output pin VCO Frequency adjustment Current control 1 Current control 0 OP amplifier 1 input/output. This pin can be used as modulated/Demodulated integrator by connecting capacitor OP Amplifier 2 input/output. This pin can be used as Modulated/Demodulated Integrator by connecting Capacitor Low pass filter 2 input/output pin Low pass filter 1 input/output pin Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
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PT2399
FUNCTION DESCRIPTION
ECHO MODE
Please refer to the diagram below:
AUTO RESET FUNCTION
The waveform of the signal during power on is given below:
TABLE 1: VCO FREQUENCY VS DELAY TIME
R fck td THD R fck td THD R fck td THD R fck td THD 27.6K 2.0M 342ms 1.0% 7.2K 6.0M 113.7ms 0.29% 2.8K 11M 61.6ms 0.18% 723 19M 36.6ms 0.14% 21.3K 2.5M 273ms 0.8% 6.4K 6.5M 104.3ms 0.27% 2.4K 12M 56.6ms 0.16% 519 20M 34.4ms 0.13% 17.2K 3.0M 228ms 0.63% 5.8K 7.0M 97.1ms 0.25% 2K 13M 52.3ms 0.15% 288 21M 32.6ms 0.13% 14.3K 3.5M 196ms 0.53% 5.4K 7.5M 92.2ms 0.25% 1.67K 14M 48.1ms 0.15% 0.5 22M 31.3ms 0.13% 12.1K 4.0M 171ms 0.46% 4.9K 8.0M 86.3ms 0.23% 1.47K 15M 45.8ms 0.15% 10.5K 4.5M 151ms 0.41% 4.5K 8.5M 81ms 0.22% 1.28K 16M 43ms 0.15% 9.2K 5.0M 136.6ms 0.36% 4K 9.0M 75.9ms 0.21% 1.08K 17M 40.6ms 0.14% 8.2K 5.5M 124.1ms 0.33% 3.4K 10M 68.1ms 0.19% 894 18M 38.5ms 0.14%
Notes: 1. R = VCO External Resistor (), please refer to PT2399 Application Circuit. 2. fck = VCO Clock Frequency (Hz). 3. td = Delay Time 4. THD = Total Harmonic Distortion 5. We do not recommend the "R" value below 1K when power on.
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PT2399
ABSOLUTE MAXIMUM RATING
(Unless otherwise specified, Ta=25) Parameter Supply voltage Supply current Power dissipation Operation temperature Storage temperature Symbol Vcc Icc Pd Topr Tstg Rating 6.5 100 1.7 -40 to +85 -65 to +150 Unit V mA W
RECOMMENDED OPERATING CONDITIONS
Parameter Supply voltage Clock frequency Symbol Vcc fck Min. 4.5 Typ. 5 4 Max. 5.5 5 Unit V MHz
AC CHARACTERISTICS
(Unless otherwise specified: Vcc=5.0V, fin=1KHz, Vi=500mVrms, fck=4MHz, Ta=25) Parameter Symbol Test Condition Min. Supply voltage Vcc 4.5 Supply current Icc Voltage gain Gv RL=47K Max. output voltage Vomax THD=10% 1 Output distortion THD A-weighted Output noise voltage No A-Weighted -95 Power supply rejection ratio PSRR Vr=100mV, f=100Hz Typ. 5.0 15 -0.5 1.25 0.4 -90 -40 Max. 5.5 30 2.5 1.5 1.0 -80 -30 Unit V mA dB Vrms % dBV dB
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PT2399
PACKAGE INFORMATION
16 PINS, DIP, 300 MIL
Symbols A A1 A2 b D E E1 e L
Notes: 1. Refer to JEDEC MS-001 Variation BB 2. Unit: mm
Dimensions Min. 0.38 2.92 0.36 18.67 7.62 2.92 Nom. 3.30 19.17 7.62 BSC 7.87 2.54 BSC Max. 5.33 4.95 0.56 19.69 8.26 3.81
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PT2399
16 PINS, SOP, 300 MIL
Symbol A A1 A2 b c D E E1 e L
Notes: 1. Refer to JEDEC MS-013AA 2. Unit: mm
Min. 0.10 2.05 0.31 0.20
0.40 0
Nom. 10.30 BSC 10.30 BSC 7.50 BSC 1.27 BSC -
Max. 2.65 0.30 0.51 0.33
1.27 8
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PT2399
16 PINS, SOP, 150MIL
Symbol A A1 A2 b c D E H e L
Notes: 3. Refer to JEDEC MS-012AC 4. Unit: mm
Min. 1.35 0.08 1.20 0.31 0.16
0.40 0
Nom. 1.45 9.90 BSC 3.90 BSC 6.00 BSC 1.27 BSC -
Max. 1.77 0.28 1.65 0.51 0.26
1.27 8
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PT2399 IMPORTANT NOTICE
Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw
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