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WM8746SEDS/R Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8746SEDS/R Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 32 page  w WM8746 24-bit, 192kHz 6-Channel DAC with Volume Control WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, March 2006, Rev 4.0 Copyright 2006 Wolfson Microelectronics plc DESCRIPTION WM8746 is a high performance 6-channel DAC designed for audio applications such as DVD, home theatre systems, and digital TV. The WM8746 supports data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. The WM8746 can convert up to 6 channels at sample rates from 8 to 192kHz. Additionally WM8746 supports 2 channels at 192kHz and 4 channels at 96kHz simultaneously. The WM8746 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and 6 DACs in a small 28-pin SSOP package. The WM8746 also includes a digitally controllable mute and attenuator function on each channel. The WM8746 supports a variety of connection schemes for audio DAC control. The serial control interface provides access to a wide range of features including on-chip mute, attenuation and phase reversal. A hardware controllable interface is also available. It is pin-compatible with the WM8736, (apart from RSTB pin which is typically unused). The WM8746 is an ideal device to interface to AC-3 , DTS , and MPEG audio decoders for surround sound applications, or for use in “universal” high definition audio players supporting DVD-A formats. FEATURES • 6-Channel DAC • Audio Performance − 106dB SNR (‘A’ weighted @ 48kHz) DAC − -95dB THD • DAC Sampling Frequency: 8kHz – 192kHz • 3-Wire Serial Control Interface • Programmable Audio Data Interface Modes − I 2S, Left, Right Justified or DSP − 16/20/24/32 bit Word Lengths • Independent Digital Volume Control on Each Channel with 127.5dB Range in 0.5dB Steps • 3.0V – 5.5V Supply Operation • 28-Pin SSOP Package • Exceeds Dolby Class A Performance Requirements • Pin Compatible with WM8736 APPLICATIONS • DVD and DVD ‘Universal’ Players • Home theatre systems • Digital broadcast receivers BLOCK DIAGRAM OUT0L GR0 OUT0R BCKIN LRCIN DIN0 DIN1 DIN2 Digital Filter Sigma Delta Modulator Stereo DAC ML/I2S MC/IWL MD/DM MODE MUTE SCKI L0A[7:0] R0A[7:0] OUT1L GR1 OUT1R Digital Filter Sigma Delta Modulator Stereo DAC L1A[7:0] R1A[7:0] OUT2L GR2 OUT2R Digital Filter Sigma Delta Modulator Stereo DAC L2A[7:0] R2A[7:0] AUDIO INTERFACE DAC CHANNEL CONTROL CONTROL INTERFACE CAP AVDD2 AVDD1 AGND2 AGND1 DVDD DGND LRCIN2 WM8746 |
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