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WM8711SEDS/R Scheda tecnica(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8711SEDS/R Scheda tecnica(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 47 page  w WM8711 / WM8711L Internet Audio DAC with Integrated Headphone Amplifier WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, September 2006, Rev 4.3 Copyright 2006 Wolfson Microelectronics plc DESCRIPTION The WM8711 or WM8711L (WM8711/L) is a low power stereo DAC with an integrated headphone driver. The WM8711/L is designed specifically for portable MP3 audio and speech players. The WM8711/L is also ideal for MD, CD machines and DAT players. Stereo 24-bit multi-bit sigma delta DACs are used with oversampling digital interpolation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8KHz to 96KHz are supported. Stereo audio outputs are buffered for driving headphones from a programmable volume control, line level outputs are also provided along with anti-thump mute and power up/down circuitry. The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including volume controls, mutes, de-emphasis and extensive power management facilities. The device is available in a small 28- lead SSOP package or the smaller 28-lead QFN (5x5x0.9 mm Body) package. A USB mode is provided where all audio rates can be derived from a single 12MHz or 24MHz MCLK, saving on the need for a PLL or multiple crystals. FEATURES • Audio Performance - DAC SNR 100dB (‘A’ weighted) at AVDD = 3.3V - DAC SNR 90dB (‘A’ weighted) at AVDD = 1.8V (WM8711L) • Low Power Headphone Playback - Down to 20mW at 3.3V - Down to 6mW at 1.8V (WM8711L) - 1.42 – 3.6V Digital Supply Operation - 2.7 – 3.6 V Analogue Supply Operation - 1.8 – 3.6 V Analogue Supply Operation (‘L’ Variant) • DAC Sampling Frequency: 8KHz – 96KHz • 2 or 3-Wire MPU Serial Control Interface • Programmable Audio Data Interface Modes - I 2S, Left, Right Justified or DSP - 16/20/24/32 bit Word Lengths - Master or Slave Clocking Mode • Stereo Audio Outputs • Output Volume and Mute Controls • Highly Efficient Headphone Driver • 28-lead SSOP or 28-lead QFN (5x5x0.9 mm) package APPLICATIONS • Portable MP3 Players • CD and Minidisc Players BLOCK DIAGRAM |
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