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WM8740SEDS/V Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8740SEDS/V Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 27 page  w WM8740 24-bit, High Performance 192kHz Stereo DAC WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews Production Data, April 2010, Rev 4.4 Copyright ©2010 Wolfson Microelectronics plc DESCRIPTION The WM8740 is a very high performance stereo DAC designed for audio applications such as CD, DVD, home theatre systems, set top boxes and digital TV. The WM8740 supports data input word lengths from 16 to 24-bits and sampling rates up to 192kHz. The WM8740 consists of a serial interface port, digital interpolation filter, multi-bit sigma delta modulator and stereo DAC in a small 28-pin SSOP package. The WM8740 also includes a digitally controllable mute and attenuator function on each channel. The internal digital filter has two selectable roll-off characteristics. A sharp or slow roll-off can be selected dependent on application requirements. Additionally, the internal digital filter can be by-passed and the WM8740 used with an external digital filter. The WM8740 supports two connection schemes for audio DAC control. The SPI-compatible serial control port provides access to a wide range of features including on- chip mute, attenuation and phase reversal. A hardware controllable interface is also available. FEATURES • 120dB SNR (‘A’ weighted mono @48kHz), THD+N: -104dB @ FS • 117dB SNR (‘A’ weighted stereo @48kHz), THD+N: -104dB @ FS • Sampling frequency: 8kHz to 192kHz • Selectable digital filter roll-off • Optional interface to industry standard external filters • Differential mono mode needing no glue logic • Input data word: 16 to 24-bit • Hardware or SPI compatible serial port control modes: - Hardware mode: mute, de-emphasis, audio format control - Serial mode: mute, de-emphasis, attenuation (256 steps), phase reversal • Fully differential voltage outputs APPLICATIONS • CD, DVD audio • Home theatre systems • Professional audio systems BLOCK DIAGRAM |
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