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WM8781 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8781 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 20 page  w WM8781 24-Bit, 192kHz Stereo ADC WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, April 2006, Rev 4.1 Copyright 2006 Wolfson Microelectronics plc DESCRIPTION The WM8781 is a high performance, low cost stereo audio ADC designed for recordable media applications. The device offers stereo line level inputs along with two control input pins (FORMAT, IWL) to allow operation of the audio interface in three industry standard modes. An internal op-amp is integrated on the front end of the chip to accommodate analogue input signals greater than 1Vrms. The device also has a high pass filter to remove residual DC offsets. WM8781 offers Master or Slave mode clocking schemes. A control input pin M/S is used to allow Slave mode operation or Master mode operation. A stereo 24-bit multi- bit sigma-delta ADC is used with 128x, 64x or 32x over- sampling, according to sample rate. Digital audio output word lengths from 16-24 bits and sampling rates from 8kHz to 192kHz are supported. The device is a hardware controlled device and is supplied in a 20-lead SSOP package. FEATURES • SNR 102dB (‘A’ weighted @ 48kHz) • THD -90dB (at –1dB) • Sampling Frequency: 8 – 192kHz • Master or Slave Clocking Mode • System Clock (MCLK): 128fs, 192fs, 256fs, 384fs, 512fs, 768fs • Audio Data Interface Modes - 16-24 bit I 2S, 16-24 bit Left, 16-24 bit Right Justified • Supply Voltages - Analogue 2.7 to 5.5V - Digital core: 2.7V to 3.6V • 20-lead SSOP package APPLICATIONS • Recordable DVD Players • Personal Video Recorders • STB • Studio Audio Processing Equipment BLOCK DIAGRAM |
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