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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8903 датащи(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8903 датащи(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 178 page  w WM8903 Ultra Low Power CODEC for Portable Audio Applications WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews Production Data, June 2012, Rev 4.5 Copyright 2012 Wolfson Microelectronics plc DESCRIPTION The WM8903 is a high performance ultra-low power stereo CODEC optimised for portable audio applications. The device features stereo ground-referenced headphone amplifiers using the Wolfson ‘Class W’ amplifier techniques - incorporating an innovative dual-mode charge pump architecture - to optimise efficiency and power consumption during playback. The ground-referenced outputs eliminate headphone coupling capacitors. Both headphone and line outputs include common mode feedback paths to reject ground noise. Control sequences for audio path setup can be pre-loaded and executed by an integrated sequencer to reduce software driver development and eliminate pops and clicks via Wolfson’s SilentSwitch™ technology. The analogue input stage can be configured for single ended or differential inputs. Up to 3 stereo microphone or line inputs may be connected. The input impedance is constant with PGA gain setting. A stereo digital microphone interface is provided, which can also be mixed with the mic/line signals at the output mixers. A dynamic range controller provides compression and level control to support a wide range of portable recording applications. Anti-clip and quick release features offer good performance in the presence of loud impulsive noises. Common audio sampling frequencies are supported from a range of external clocks, either directly or generated via the Frequency Locked Loop (FLL). The WM8903 can operate directly from a single 1.8V switched supply. For optimal power consumption, the digital core can be operated from a 1.0V supply. FEATURES 4.5mW power consumption for DAC to headphone playback DAC SNR 96dB typical, THD -86dB typical ADC SNR 92dB typical, THD -80dB typical Control sequencer for pop minimised start-up and shut- down Single register write for default start-up sequence Integrated FLL provides all necessary clocks - Self-clocking modes allow processor to sleep - All standard sample rates from 8kHz to 96kHz Stereo digital microphone input 3 single ended inputs per stereo channel 1 fully differential mic / line input per stereo channel Digital Dynamic Range Controller (compressor / limiter) Digital sidetone mixing Ground-referenced headphone driver Ground-referenced line outputs Stereo differential line driver for direct interface to WM9001 speaker driver 40-pin QFN package (5x5mm) APPLICATIONS Portable multimedia players Multimedia handsets Handheld gaming |
Аналогичный номер детали - WM8903 |
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Аналогичное описание - WM8903 |
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