Edinburgh, Scotland - Wolfson Microelectronics plc's latest line of codecs and A/D converters aims squarely at next-generation Class-D DVD players, AV receivers, digital set-top boxes and digital effects processors and recordable media. The WM8776 and WM8778 codecs and the WM8775 A/D converter are said to provide a dedicated solution for emerging recordable media technologies and digital amplifiers.
"Digital media is about to enter a new level of performance and quality that will push current mixed-signal semiconductors to their limits," predicts Wolfson's CEO and managing director, David Milne, who said the applications will demand a higher level of components integration.
The WM8776 stereo codec is said to be the most highly integrated device of the family, containing five stereo A/D converter inputs with analog gain adjustable from +24dB to -21dB in 0.5-dB steps. The device also has a stereo D/A converter with independent analog and digital volume controls, and stereo headphone and line output. The WM8775 has an input multiplexer with four stereo inputs with analog gain adjustable from +24dB to -21dB in 0.5-dB steps and a separate digital gain from -21dB to -103dB [in 0.5-dB steps. Analog inputs can be muxed into the A/D or combined before input to the A/D. The 8776 and 8778 codecs feature 108-dB signal-to-noise ratio (SNR) D/As.
The A/D's SNR for the three products is rated at 100dB. The D/A sampling frequency is 32 to 192 kHz and the A/D sampling is rated at 32 to 96 kHz. The three devices also offer automatic level control on the A/D input. The user can set a predetermined maximum analog signal level to prevent the A/D input full-scale voltage from being exceeded. The automatic level control will progressively ramp down the gain and limit the signal magnitude to the predetermined limit. The three devices also offer a three-wire SPI-compatible or two-wire serial control interface, master or slave clocking modes and programmable audio data interface modes and operate on 2.7- to 5.5-volt analog or 2.7- to 3.6-V digital supplies.
The WM8775, in a 28-pin SSOP, is priced at $1.63 in quantities of 10,000. The WM8776, in a 48-pin TQFP, is priced at $2.45 and the WM8778,in a 28-pin SSOP, is priced at $2.12 in quantities of 10,000.
Specifically targeting consumer and professional audio, Wolfson has launched its WM8803 receiver and WM8802 digital audio transmitter that let manufacturers integrate 192-kHz S/PDIF solutions on their design. The WM8803 receives and decodes digital audio data with sample rates to 192 kHz and uses a low-jitter clock recovery mechanism to yield a clean recovered clock from the incoming audio stream.
The WM8803 and WM8802 are available in 24-pin TSSOP or 48-pin SQFP packages, respectively. The WM8803 is currently priced at $3.71 (U.S.) and the WM8802 at $4.85 (U.S.) in lots of 10,000.
Call +44 (0) 131 272 7000