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8-channel PWM audio processor touts dual ASRCs

Posted: 19 Apr 2013     Print Version  Bookmark and Share

Keywords:Texas Instruments  PWM audio processor  ASRC  TAS5548  MSP430 

Texas Instruments Inc. has anounced what it boasts as the industry's first 8-channel pulse-width modulator (PWM) audio processor with dual asynchronous sample rate converters (ASRCs) integrated on a single chip. According to the company, the HD-compatible TAS5548 enables home and pro audio designers to seamlessly mix two audio sources, providing design flexibility and cost savings compared to competitive solutions that require two chips.

The device accepts sample rates from 8-192kHz and converts them to a fixed rate of 96kHz or 192kHz, eliminating the need to create, store and change coefficients. This simplifies the design of digital multi-channel products such as Blu-ray home-theater-in-a-box (HTiB), A/V receivers, mini/micro combos and soundbars, the company added.

The TAS5548's 40kHz audio bandwidth is compatible with Dolby True HD and DTS-HD, and claims to deliver unmatched multi-channel performance. Designers can optimize their products with rich audio processing capabilities, such as 7-band parametric equalization (EQ), bass and treble tone control, volume and loudness control, dynamic range compression (DRC), and input and output mixing.

The TAS5548 features an integrated smart energy manager that is said to deliver more efficient operation. It can limit the audio system's peak power by interrupting the host processor if the power threshold is reached. For high-end audio systems, a power supply volume control enables energy-efficient high-power performance. Additionally, the device combines with the ultra-low power MSP430 Value Line microcontroller, PCM9211 digital audio interface transceiver with stereo ADC, and the TAS5624A and TAS5614LA 150W stereo/300W mono PurePath HD digital-input power stage devices. The TAS5548 is available in a 56-pin TSSOP package for a suggested retail price of Rs.197.85 ($3.68) in 1,000-unit quantities.

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