Wave Issue 0348 01/30/04 Article 1-03

*** National Semiconductor Introduces Filter-less Class D Boomer
Audio Amplifier
(January 26)

National Semiconductor Corporation introduced LM4667, a filter-
less Boomer audio amplifier for cellular phones and portable
consumer devices.

It is housed in a micro SMD package. The LM4667 processes analog
inputs with a delta-sigma modulation technique. Operating on a
single 3V supply, it is capable of driving 8Ohm transducer loads
at a continuous average output of 450mW with less than 1% THD+N.
Its power supply requirements allow operation from 2.7V to 5.5V.

Pricing and Availability

The LM4667 is available now in 9-bump micro SMD packaging and is
priced at $0.48 in 1,000-unit quantities. More information on the
LM4667 is available at http://www.national.com/pf/LM/LM4667.html