Automotive Mobile Audio Video

Suited for multimedia portable applications, AT73C213 integrates audio-quality 20-bit stereo DAC that delivers 93 dB dynamic range, audio power amplifier that provides up to 1 W, and 32 ohm stereo headset driver with programmable volume control and mute function. Stereo DAC comprises multi-bit sigma-delta modulator with dither, continuous time analog filters, and analog output drive circuitry. Master clock allows choice of input data rate up to 50 kHz.

ROUSSET, France, Feb. 7 -- Atmel(R) Corporation (NASDAQ:ATML) announced today the release of its AT73C213 Audio Companion Chip for Multimedia Portable Applications. Manufactured on Atmel's low-cost mainstream CMOS process, the AT73C213 integrates an audio-quality 20-bit stereo DAC and an audio power amplifier providing up to 1W. The AT73C213 is ideally suited for any application where a high-quality audio interface is required, such as new-generation mobile phones, PDAs, palmtop computers, digital still cameras, multimedia portable devices, music players, etc.

The AT73C213 integrates a complete high-performance stereo audio digital-to-analog converter delivering a 93 dB dynamic range, followed by a 32-ohm stereo headset driver with programmable volume control and mute function. The stereo DAC comprises a multi-bit sigma-delta modulator with dither, continuous time analog filters and analog output drive circuitry. The master clock is 256 and 384 times the sampling frequency allowing the choice of input data rate up to 50 kHz, including standard audio rates of 48, 44.1, 32, 16 and 8 kHz. The stereo 32-ohm headset drivers also include a mixer of pair of stereo inputs as well as a differential monoaural auxiliary input.

The DAC outputs can also be played back through a mixer buffer stage to the integrated audio power amplifier. The mono buffer stage can also receive the mixing of the stereo inputs as well as the differential monaural auxiliary input (which can be, for example, from a voice CODEC output driver in mobile phones). The audio power amplifier is a dual-mode class AB amplifier with differential output and programmable volume control. In full power mode, it is capable of driving an 8-ohm loudspeaker at maximum power of 1W at 5V supply and 440mW at 3.6V supply. In low power mode, it can drive the same loudspeaker as an earpiece, making it suitable as a hands-free driver in wireless handset applications. The volume, mute, power down, de-emphasis controls and 16-, 18-, 20-bit audio formats are digitally programmable via a 4-wire SPI bus and the digital audio data is provided through a multi-format I2S interface.

"The AT73C213 is a milestone in our product line," commented Michele Casetta, Marketing Manager for Atmel's Power Management and Audio Analog Companion (PMAAC) product line. "The AT73C213 combined with any of our other power management products can provide customers with a compact and low-cost analog solution based on a power supply unit and audio interface. The AT73C213 is a breakthrough solution for current and future consumer product generations where digital processing is migrating to below 0.13um technologies while maintaining high-quality analog performance with low-cost analog CMOS processes."

"The AT73C213 has been rated in the high-quality range of stereo audio DACs by our customers," added Mr. Casetta. "Stereo and mono line input, high- quality stereo output and a mixing channel are unique features for portable handset applications. Few competitors are able to propose a high-quality audio converter and power speaker driver in a single chip as we do in the AT73C213."

Atmel offers the AT73C213 in a 7x7mm, 32-pin QFN package to satisfy portable device manufacturers' minimum space requirements. It is available either mounted on a reference design board or as engineering samples. Production quantities are also available, with a reference price below $US 1.00 in large quantities.

# posted by Medical Information : 3:40 AM