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AD74111YRUZ-REEL Arkusz danych(PDF) 1 Page - Analog Devices |
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AD74111YRUZ-REEL Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 20 page REV. 0 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 that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. AD74111 Low Cost, Low Power Mono Audio Codec FEATURES 2.5 V Mono Audio Codec with 3.3 V Tolerant Digital Interface Supports 8 kHz to 48 kHz Sample Rates Supports 16-/20-/24-Bit Word Lengths Multibit - Modulators with “Perfect Differential Linearity Restoration” for Reduced Idle Tones and Noise Floor Data Directed Scrambling DAC – Least Sensitive to Jitter Performance (20 Hz to 20 kHz) 85 dB ADC Dynamic Range 93 dB DAC Dynamic Range Programmable ADC Gain On-Chip Volume Control for DAC Channel Software Controllable Clickless Mute Supports 256 fS, 512 fS, and 768 fS Master Mode Clocks Master Clock Prescaler for Use with DSP Master Clocks On-Chip Reference 16-Lead TSSOP Package APPLICATIONS Digital Video Camcorders (DVC) Portable Audio Devices (Walkman®, PDAs, and so on) Audio Processing Voice Processing Telematic Systems General-Purpose Analog I/O FUNCTIONAL BLOCK DIAGRAM GAIN STAGE DIGITAL FILTER ADC VIN CAPP CAPN DVDD2 AVDD DVDD1 DAC CHANNEL VOLUME CONTROL DIGITAL FILTER VOUT AGND REFCAP DIN DOUT DFS DCLK DGND MCLK RESET - DAC MODULATOR - MODULATOR SERIAL DATA PORT REFERENCE GENERAL DESCRIPTION The AD74111 is a front-end processor for general-purpose audio and voice applications. It features a multibit - A/D conversion channel and a multibit - D/A conversion channel. The ADC channel provides >67 dB THD+N and the DAC channel pro- vides >88 dB THD+N, both over an audio signal bandwidth. The AD74111 is particularly suitable for a variety of applications where mono input and output channels are required, including audio sections of digital video camcorders, portable personal audio devices, and telematic applications. Its high quality performance also makes it suitable for speech and telephony applications such as speech recognition and synthesis, and modern feature phones. An on-chip reference voltage is included but can be powered down and bypassed by an external reference source if required. The AD74111 offers sampling rates that, depending on MCLK selection and MCLK divider ratio, range from 8 kHz in the voiceband range to 48 kHz in the audio range. The AD74111 is available in a 16-lead TSSOP package option and is specified for the automotive temperature range of –40 °C to +105 °C. |
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