TI Filter-Free Class-D Audio Power Amplifier Targets GPRS and 3G Cellular Phones

date: July 30, 2002

Offering a small package and superior noise rejection ideal for designers of GPRS and 3G cellular phones Texas Instruments Incorporated today announced a new 1.1 W mono Filter-Free class-D audio power amplifier immediately available. By eliminating the output filter and improving the common-mode input range, the total solution size is 30 percent smaller than its siblings and surpasses all Class-D amplifiers on the market in radio frequency (RF) noise rejection.

Similar to other members in the TPA200xDx family, the TPA2005D1 does not require an output filter and is more than 85 percent efficient, helping extend battery life. The solution consists of four components: the integrated circuit (IC), two resistors and one capacitor. A fully-differential architecture provides superior noise cancellation for clean, pure audio performance. Supporting this claim is an 78-dB PSRR specification at 217Hz and a 48-microV(RMS) noise floor over the entire audio band. Both specifications are best in industry for class-D audio power amplifiers and even surpass many class-AB amplifiers. Complementing the outstanding audio performance and efficient operation are the low quiescent current and shutdown current.

"The TPA2005D1's combination of performance and size are a great fit in the cellular handheld market for use of voice memo playback, personalized ringers or alarms and hands-free features," said Eric Droge, product marketing manager for TI's Audio Power Amplifiers. "A small footprint and RF immunity are characteristics an audio power amplifier needs to be successful in the cellular market, and these were a priority for TI throughout the design and development process."

Top Sellers at our online store

1.	NEC e606 on 3
2.	Orange Nokia 7250i
3.	O2 Samsung A800
4.	NEC e808 on 3
5.	Motorola A920 on 3

last updated: January 12, 2004

Visit our online store, click here

3 phones

3G Motorola A920
Available Now! Superb full colour touch- sensitive screen with a built-in digital camera for Video Calling.
Buy now from Free

M-Profits: Making Money from 3G Services
ISBN: 0470847751

This book discusses 3G services from the view of what is needed for the service to provide value to the user, what is the value proposition for the user, how will money be made out of delivering the service, and discussions on how revenue sharing propositions might work to benefit content providers and network operators. 3G operators should take note of this highly recommended book.

buy it UK | USA

3G Books to Read!

top