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AD74322DARU Folha de dados(PDF) 1 Page - Analog Devices |
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AD74322DARU Folha de dados(HTML) 1 Page - Analog Devices |
1 / 20 page AD74322 = REV. Pr D 03/00 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 Analog Devices, Inc., 1998 LowCost,LowPower StereoAudioAnalogFrontEnd Preliminary Technical Data PRELIMINAR Y TECHNICAL DA TA FEATURES 2.5V Stereo Audio Codec with 3.3 V Tolerant Digital Interface Supports 96 kHz Sample Rates Supports 16/18 /20/24-Bit Word Lengths Multibit Sigma Delta Modulators with “Perfect Differential Linearity Restoration” for Reduced Idle Tones and Noise Floor Data Directed Scrambling DACs - Least Sensitive to Jitter Performance (20 Hz to 20 kHz) 90 dB ADC and DAC SNR Digitally Programmable Input/Output Gain On-chip Volume Controls Per Output Channel Hardware and Software Controllable Clickless Mute Supports 256xFs, 512xFs and 768xFs Master Mode Clocks Master Clock Pre-Scaler for use with DSP master clocks Flexible Serial Data Port with Right-Justified, Left- Justified, I2S-Compatible and DSP Serial Port Modes Supports Packed Data Mode (“TDM”) for cascading devices. On-Chip Reference 16, 20 and 24-Lead SOIC, SSOP and TSSOP Package options. APPLICATIONS Digital Video Camcorders (DVC) Portable Audio Devices (Walkman etc) Audio Processing Voice Processing Conference Phones General Purpose Analog I/O FUNCTIONALBLOCKDIAGRAM GENERAL DESCRIPTION The AD74322 is a front-end processor for general purpose audio and voice applications. It features two multi-bit Σ∆ A/D conversion channels and two multi-bit Σ∆ D/A conversion channels. Each ADC channel provides >85 dB signal-to-noise ratio while each DAC channel provides >90 dB, both over an audio signal bandwidth. The AD74322 is particularly suitable for a variety of ap- plications where stereo input and output channels are required, including audio sections of Digital Video Camcorder, portable personal audio devices and the analog front ends of conference phones . Its high quality performance also make it suitable for speech and telephony applications such as speech recognition and synthesis and modern feature phones. DGND AGND REFCAP CLKIN DVDD2(INT) AVDD DVDD1(EXT) Reference CDIN CDOUT CCLK CLATCH SPI Port I2S Port Control Block ASDATA DSDATA LRCLK BCLK ADC CHANNEL 1 ADC CHANNEL 2 DAC CHANNEL 2 DAC CHANNEL 1 VIN1 VIN2 VOUT1 VOUT2 DGND AGND REFCAP CLKIN DVDD2(INT) AVDD DVDD1(EXT) Reference Control Block Data Port SDO SDI SDIFS SDOFS SCLK ADC CHANNEL 1 ADC CHANNEL 2 DAC CHANNEL 2 DAC CHANNEL 1 VIN1 VIN2 VOUT1 VOUT2 CDIN CDOUT CCLK CLATCH ASDATA/SDO DSDATA/SDI LRCLK/SDIFS SDOFS BCLK/SCLK VIN1P VIN1N VIN2P VIN2N VOUT1P VOUT1N VOUT2P VOUT2N ADC CHANNEL 1 ADC CHANNEL 2 DAC CHANNEL 2 DAC CHANNEL 1 I2S Port DGND AGND REFCAP CLKIN DVDD2(INT) AVDD DVDD1(EXT) SPI Port Reference Control Block |
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Descrição semelhante - AD74322DARU |
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