DESCRIPTION

The A2211 is a

mono fully differential audio power

amplifier designed for portable communication device

applications.

The A2211

operates from 2.2V to 5.5V, is capable of

deliverin g 1.25 W of continuous average power to an

8Ω BTL load w ith less than 1 distortion (THD+N)

from a 5V supply

A2211 f

eatures like 86dB PSRR at 21 7Hz, improved

RF rectification immunity, small PCB area, a fast

startup with minimal pop & click circuitry makes the

A2211 idea for PDA, smartphone applications; and

low power shutdown mode suitable for wireless

handsets.

The A2211 is unity

gain stable, and the gain can be

configured by external input resistors and internal

feedback resistors.

The A2211 is available in MSOP8 package

FEATURES

 1.25W into 8Ω from a 5V Supply at THD=1 (Typ)

 Wide Supply Voltage: 2.2V to 5.5V

 Ultra low shutdown current : 0.01uA (Typ

 Fast Startup With Minimal POP

 Fully differential design reduce RF rectification

 Improved PSRR 86dB at 217Hz (V DD >

 Improved pop & click cir cuitry eliminates Noise

During Turn on and Turn off Transitions

 Thermal overload protection circuitry

 No output coupling capacitors, bootstrap

capacitors required

 Unity gain stable

 External gain configuration capability

 Available in MSOP8 p ackage

APPLIC ATION

 GPS, Wireless Handsets

 Portable Audio Devices

 PDA, Handheld Computer

 RF Audio Application