CLASS AB 1.25W DIFFERENTIAL AUDIO POWER AMPLIFIER - AiT Semiconductor
Description
AiT Semiconductor Inc.
www.
ait-ic.
com
A2211
CLASS AB 1.
25 W DIFFERENTIAL AUDIO POWER AMPLIFIER WITH INTERNAL FEEDBACK CIRCUIT
DESCRIPTION
FEATURES
The A2211 is a fully differential audio power amplifier
Fully Differential Amplifier
designed for portable communication device
Improved PSRR at 217Hz(VDD>3.
0V):
applications.
86dB(Typ.
)
The A2211 is capable of delivering 1.
25W of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5V battery voltage.
And operates from 2.
2V to 5.
5V.
Power Output at 5.
0V & 1% THD: 1.
25W(Typ.
) Power Output at 3.
6V & 1% THD: 0.
6W(Typ.
) Ultra Low Shutdown Current: 0.
01uA(Typ.
) Improved Pop & Click Circuitry Eliminates
A2211 features 86dB PSRR at 217Hz, improved
Noise During Turn-on and Turn-off
RF-rectification immunity, the advanced pop & click
Transitions
circuitry, a minimal count of external components and
Thermal Overload Protection Circuitry
low-power shutdown mode make A2211 idea for
No Output Coupling Capacitors, Bootstrap
wireless handsets.
Capacitors Required
The A2211 is unity-gain stable, and the gain can be configured by external input resistors and internal feedback resistors.
Unity-Gain Stable External Gain Configuration Capability Available in MSOP8 Package
The A2211 is available in MSOP8 package TYPICAL APPLICATION
APPLICATION
GPS, Wireless Handsets Portable Audio Devices PDA, Handheld Computer RF Audio Application
ORDERING INFORMATION
Package Type
Part Number
MSOP8
MS8 A2211MS8R
Note
R: Tape & Reel
AiT provides all Pb free products
REV1.
2
1
AiT Semiconductor Inc.
www.
ait-ic.
com
A2211
CLASS AB 1.
25 W DIFFERENTIAL AUDIO POWER AMPLIFIER WITH INTERNAL FEEDBACK CIRCUIT
PIN DESCRIPTION
Pin # 1
2
3 4 5 6 7 8
Symbol SD
BP
IN+ INVOUT1 VDD GND VOUT2
Top View
Type I
I
I I O I I O
Functions Shutdown Pin, Active Low Common Mode Voltage.
Connect a Bypass Capacitor to GND for Common Mode Voltage Filtering.
The Bypass Capacitor is Optional.
Positive Differential I...
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