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CXD2720Q Dataheets PDF



Part Number CXD2720Q
Manufacturers Sony Corporation
Logo Sony Corporation
Description Single-Chip Digital Signal Processor for Karaoke
Datasheet CXD2720Q DatasheetCXD2720Q Datasheet (PDF)

CXD2720Q Single-Chip Digital Signal Processor for Karaoke Description The CXD2720Q is a digital signal processor LSI for Karaoke, suitable for use in LD/CD/CD-G/video CD and the like. A large capacity DRAM and AD/DA converters are built in, and Karaoke functions such as key control, microphone echo and voice canceling are contained on a single chip. Features • 3-channel 1-bit AD converter and decimation filter S/N ratio: 88 dB THD + N: 0.016% Filter pass band ripple: less than ±0.5dB Filter stop.

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CXD2720Q Single-Chip Digital Signal Processor for Karaoke Description The CXD2720Q is a digital signal processor LSI for Karaoke, suitable for use in LD/CD/CD-G/video CD and the like. A large capacity DRAM and AD/DA converters are built in, and Karaoke functions such as key control, microphone echo and voice canceling are contained on a single chip. Features • 3-channel 1-bit AD converter and decimation filter S/N ratio: 88 dB THD + N: 0.016% Filter pass band ripple: less than ±0.5dB Filter stop band attenuation: less than –41dB (all characteristics are typical values) • 2-channel 1-bit DA converter and oversampling filter S/N ratio: 98dB THD + N: 0.006% Filter pass band ripple: less than ±0.2dB Filter stop band attenuation: less than –41dB (all characteristics are typical values) • In addition to analog input/output, 2-channel input/ 2-channel output of digital input/output are provided. The interface also supports a variety of formats. • 128K-bit DRAM for key control and microphone echo processing Functions • Key controller pitch setting can be varied to a maximum of ±1 octave with a precision of 14 bits • Microphone echo delay time can be varied to a maximum of 185ms (when Fs = 44.1kHz) • Voice canceller supports settings other than center by the panpot volume • Voice parametric equalizer • Voice pitch shifter • Mixing function to support sound multiplexing software • Digital de-emphasis function 100 pin QFP (Plastic) Structure Silicon gate CMOS Applications Equipment having Karaoke function, such as LD/CD, compact music center, video games, etc. Absolute Maximum Ratings • • • • • (Ta = 25°C, VSS = 0V) Supply voltage VDD VSS – 0.5 to +7.0 V Input voltage VI VSS – 0.5 to VDD + 0.5 V Output voltage VO VSS – 0.5 to VDD + 0.5 V Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +150 °C Recommended Operating Conditions • Supply voltage VDD 4.5 to 5.5 (5.0 typ.) V • Operating temperature Ta –20 to +75 °C Input/Output Capacitance 9 (max.) pF • Input capacitance CIN • Output capacitance COUT 11 (max.) pF • Input/output capacitance CI/O 11(max.) pF ∗ Measurement conditions: VDD = VI = 0V, F = 1MHz Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. –1– E96426-ST CXD2720Q Block Diagram 128K bit DELAY RAM RVDT 3 SCK XLAT 4 5 MICRO COMPUTER I/F DAC1 25 AO1P 26 AO1N 39 AO2N 40 AO2P 29 AIN1 REDY 6 TRDT 7 DAC2 DSP LRCK 88 BCK 87 SI 86 SO 12 XWO 8 SERIAL DATA I/F ADC1 ADC2 36 AIN2 ADC3 CLOCK GENERATOR /TIMING CIRCUIT 22 AIN3 33 32 82 XTLI XTLO BFOT Pin Configuration VDD2 VSS6 VSS5 VSS4 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC 50 NC 49 NC 48 47 NC NC .


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