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PDF A2211 Data sheet ( Hoja de datos )
| Número de pieza | A2211 | |
| Descripción | CLASS AB 1.25W DIFFERENTIAL AUDIO POWER AMPLIFIER | |
| Fabricantes | AiT Semiconductor | |
| Logotipo |  |
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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
1 page  
AiT Semiconductor Inc.
www.ait-ic.com
A2211
CLASS AB 1.25 W DIFFERENTIAL AUDIO POWER AMPLIFIER
WITH INTERNAL FEEDBACK CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
1. Output Power vs. Supply Voltage, RL=8Ω
2. Power Dissipation vs. Output Power
3. Power Dissipation vs. Output Power
4. Power Derating Curve
5. THD+N vs. Frequency
VDD=5V, RL=8Ω, Po=600mW
6. THD+N vs. Frequency
VDD=3.6V, RL=8Ω, Po=400mW
REV1.2
5
5 Page 
AiT Semiconductor Inc.
www.ait-ic.com
A2211
CLASS AB 1.25 W DIFFERENTIAL AUDIO POWER AMPLIFIER
WITH INTERNAL FEEDBACK CIRCUIT
Fig. 3 Single-Ended Input Application
Input Resistor (RI)
The input (RI) and internal feedback resistors, RF=40KΩ, set the gain of the amplifier according to the
following (E1):
Gain = 40KΩ / RI
In order to optimize the THD+N and SNR performance, the A2211 should be used in low closed-loop gain
configuration. RI should be in range from 1KΩ to 100KΩ. Resistor matching is very important for fully
differential amplifiers. The balance of the output on the common mode voltage depends on matched ratios of
the resistors. CMRR, PSRR, and the second harmonic distortion is increased if resistor is not matched.
Therefore, it is recommended to use 1% tolerance resistors or better to keep the performance optimized.
REV1.2
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet A2211.PDF ] | |
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