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TI PWM processor offers eight speaker channels

Posted: 15 Sep 2004 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? ti? pulse-width modulator processor? pwm processor? tas5518?

Texas Instruments Inc. (TI) unveiled a digital amplifier pulse-width modulator (PWM) processor that provides up to eight speaker channels with 48bit processing, and achieves a 110dB dynamic range on all eight channels.

Said to offer the highest level of integration and sound quality to consumer electronics manufacturers developing products such as A/V receivers and DVD receivers, the new TAS5518 also provides an additional 24dB dynamic range boost with a power supply volume control feature, which at normal listening levels, gives a dynamic range of 134dB. The device also offers one of the lowest noise floor in the digital amplifier industry, with as low as 10?V of output noise.

The audio processor operates in conjunction with TI's power stages including the TAS5182, an all-digital power solution with up to 100W output drive. The TAS5182 is designed with an architecture that uses external, discrete MOSFETs for the H-bridge and achieves efficiency of more than 95 percent in high-power amplification. With its efficient architecture and thermal PowerPad package, the TAS5182 exceeds low heat loss and low power requirements, enabling A/V receivers to be reduced to one-quarter the height of previous systems.

"The TAS5518 is a great complement to our industry-leading product line of digital amplifier solutions," said Jeff Akgul, Home Digital Audio business manager at TI. "Sound performance is one of the key differentiators in this market, and achieving this level of clarity, while minimizing size and cost, is a benefit we are happy to pass along to our customers."

The PurePath Digital technology

The TAS5518 and TAS5182 are based on the company's PurePath Digital technology. According to TI, this technology allows consumer electronics manufacturers to build completely digital, end-to-end audio products with cutting-edge sound reproduction and the most lifelike sound in a compact form factor. It complements other TI digital and analog products that support audio applications, such as DSPs, switch mode power management devices, headphone amplifiers, digital interface and audio data converters.

The TAS5518 digital audio processor is already available in volume production. Packaged in a 64-pin TQFP, the device is priced at $7.95 each in quantities of one thousand. The TAS5182 power stage is available for $5.30, also in quantities of one thousand.

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