WM8728

WM8728 24-bit, 192kHz Stereo DAC with Volume Control and DSD Support DESCRIPTION The WM8728 is a high performance stereo DAC designed for audio applications such as DVD, home theatre systems, and digital TV. The WM8728 supports PCM data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. Alternatively the WM8728 can operate in DSD compatible mode where a 64x bitstream is input for each channel. The WM8728 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and stereo DAC in a small 20-pin SSOP package. The WM8728 also includes a digitally controllable mute and attenuate function for each channel. The WM8728 supports a variety of connection schemes for audio DAC control. The 2 or 3-wire MPU serial port provides access to a wide range of features including on-chip mute, attenuation and phase reversal. A hardware controllable interface is also available (DSD operation is only possible in hardware mode). The WM8728 is an ideal device to interface to AC-3, DTS, and MPEG audio decoders for surround sound applications, or for use in DVD players supporting DVD-A. BLOCK DIAGRAM Product Preview, Rev 1.2, April 2001 FEATURES Stereo DAC with 24 bit PCM or single bit DSD operation Audio Performance - 106dB SNR (‘A’ weighted @ 48kHz) DAC - -97dB THD DAC Sampling Frequency: 8kHz - 192kHz 2 or 3-Wire Serial Control Interface or Hardware Control Programmable Audio Data Interface Modes - I2S, Left, Right Justif...