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TI boosts portable audio performance with industryís first stereo Class-D amplifier featuring dynamic range compression and speaker protection


Device enhances volume and clarity in handsets and personal navigation devices

Texas Instruments Incorporated (TI) (NYSE:TXN) today introduced a highly advanced, filter-free, stereo Class-D amplifier that provides a 1.7-W per channel output drive capability across an 8-Ohm load and improves overall volume versus traditional Class-D products. The new amplifier incorporates programmable dynamic range compression (DRC) that automatically adjusts the audio to the desired loudness range while protecting the speaker and preventing clipping and distortion. In addition, the chipís flexibility and intuitive support tools ease design and speed time to market for manufacturers of wireless handsets, personal navigation devices, notebook PCs and portable DVD players. (See

Programmable DRC boosts volume while protecting the speaker

To address the need for louder volume from the speaker, the feature-rich TPA2016D2 incorporates DRC to automatically boost soft volumes. Conversely, DRC enables designers to compress the dynamic range of the audio to match the dynamic range of the speaker in order to reduce disturbingly loud volumes that cause clipping and distortion. The DRC functionality also protects the speaker from damage at high power levels to avoid field failures. In addition, the DRC capability in the TPA2016D2 frees up to 20 percent of MIPS in the digital signal processor (DSP) for other functions.

Flexibility and dynamic tools ease design and speed time to market

The DRC can be programmed via digital I2C control and provides designers with the flexibility to specify the design parameters that optimize their systemís audio performance. For instance, users can select gains from -28 dB to +30 dB as well as program attack/hold/release times, compression ratios and noise threshold values.

Evaluation modules (EVMs) with software, including user-friendly graphic user interface (GUI), illustrate the complete flexibility of DRC. The GUI includes a dynamically changing graphical plot that visually depicts the input-output relationship for easy comprehension and rapid evaluation to speed time to market.

Extending TIís portfolio of portable audio solutions

The TPA2016D2 amplifier is optimized to work with other products from TIís broad portfolio including audio converters (TLV320AIC3104, TLV320AIC33 and TLV320AIC34), digital-to-analog converters (TLV320DAC32, PCM1774) and headphone amplifiers (TPA4411, TPA6130A2). The TPA2016D2 can be used in conjunction with TIís DSP and OMAPTM processors, or the companyís highly integrated LoCostoTM or OMAP-VoxTM solutions for wireless handsets.

Pricing and availability

The TPA2016D2 Class-D amplifier is available now from TI and its authorized distributors in a space-saving 2.2-mm x 2.2-mm, NanoFreeTM WCSP package. Suggested resale pricing is $1.60 in 1,000-unit quantities. Samples and EVMs are available at


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