Interfaces add digital audio

The WM8803 digital audio receiver and the WM8802 digital audio transmitter allow manufacturers to integrate 192kHz S/PDIF solutions on to their designs.

The WM8803 digital audio receiver and the WM8802 digital audio transmitter allow manufacturers to integrate 192kHz S/PDIF solutions on to their designs.

These products are intended to be ideal solutions to target consumer and professional applications such as audio/video receivers, DVD receivers, DVD-R/W players, personal video recorders (PVRs), portable music players and digital mixing consoles.

The WM8803 is a digital audio interface receiver conforming to IEC60958/61937 and EIAJ CP-1201.

The WM8803 receives and decodes digital audio data with sample rates up to 192kHz, and uses a low-jitter clock-recovery mechanism to yield a clean recovered clock from the incoming audio stream.

The WM8803 is a single-input device but also a flexible digital output port that allows the user access to channel status pre-emphasis information, input signal sampling frequency, subcode Q data with the associated CRC flags and other status data.

It provides several low-power modes, supporting applications that require long battery life, such as portable audio devices and PDAs.

The WM8802 digital audio transceiver accepts and encodes audio and digital data, which are then multiplexed, encoded and driven onto a cable/optical transmission interface.

Data input to the serial digital-audio data input pin can also be modulated using the onboard PLL or with the use of an external clock source.

The WM8802 can support up to six data inputs and one data output which provides a number of flag outputs including PCM data valid, de-emphasis, lock and IEC61937, DTS-CD/LD detection.

The WM8803 and WM8802 are fully compatible with EIAJ CP1201, IEC60958/61937, S/PDIF and AES3 standards.

Both digital audio interface products have 5V-tolerant digital inputs and operate from a 3.3V power supply and allow for stand-alone operation in systems with no microcontroller.

Finally, the WM8803 and WM8802 are designed with the intention of being the perfect companion chips for products like the WM8772 and the WM8770 audio codecs for the target applications mentioned above.

"The WM8803 and WM8802 enable a new level of audio performance for the next generation of digital entertainment systems", said David Milne, Wolfson's CEO and managing director.

"More and more we see systems manufacturers looking to Wolfson to explore, leverage and develop high performance new audio components for optimal digital solutions on their products".

The WM8803 and WM8802 are available in 24-pin TSSOP or 48-pin SQFP packages, respectively.

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