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WM8711BL Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8711BL Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 43 page  w WM8711BL Ultra-Small Audio DAC with Headphone Amplifier WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, April 2007, Rev 4.1 Copyright ©2007 Wolfson Microelectronics plc DESCRIPTION The WM8711BL is an ultra-small, low power stereo DAC with an integrated headphone driver. It is designed specifically for portable audio systems requiring hi-fi stereo playback through headphones. 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 an ultra- small 24-lead QFN (4x4x0.9 mm Body) package. A USB clocking 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 97dB (‘A’ weighted) at AVDD = 3.3V - DAC SNR 90dB (‘A’ weighted) at AVDD = 1.8V • Low Power Headphone Playback - Down to 6mW at 1.8V - 1.42 – 3.6V Digital Supply Operation - 1.8 – 3.6 V Analogue Supply Operation • 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 • 24-lead QFN (4x4x0.9 mm) package APPLICATIONS • Multimedia Mobile Phones • Portable MP3 / CD Players BLOCK DIAGRAM DIGITAL FILTERS CONTROL INTERFACE VOL/ MUTE VOL/ MUTE H/P DRIVER H/P DRIVER RHPOUT LHPOUT ROUT LOUT +6 to -73dB 1 dB Steps HPVDD HPGND +6 to -73dB 1 dB Steps DACLRC BCLK DACDAT MUTE MUTE DAC DAC LLINEIN RLINEIN OSC CLKIN DIVIDER (Div x1, x2) CLKIN DIVIDER (Div x1, x2) W WM8711B |
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