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PA4220DQ-T7 PDF预览

PA4220DQ-T7

更新时间: 2024-10-28 09:53:27
品牌 Logo 应用领域
PROTEC /
页数 文件大小 规格书
7页 190K
描述
Pop-Up and Shutdown Noise Suppressor

PA4220DQ-T7 数据手册

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PA4220  
ANALO G P RO DUCTS DIVIS IO N  
Pop-Up and Shutdown Noise Suppressor  
FEATURES  
GENERAL DESCRIPTION  
PA4220 is a low power (ICC< 1μA) monolithic mixed signal  
device. PA4220’s function is to control the power supply  
transition noise in audio systems.  
PA4220 boasts several features that make it a “one of a kind”  
product on the market. Most prominent is the feature is that it  
does not require any external signal to suppress POPUP  
and SHUTDOWN Noise.  
Extremely Low supply current (<1μA).  
Shunt operation hence distortion free.  
Instantaneous. Power-up and Power-down muting.  
No external microcontroller signal needed.  
ESD protected outputs.  
1.5V to 5V supply operation.  
Handle up to 3.5V RMS signal.  
Compact 2 x 2 x 0.8mm 6L DFN.  
Standard 8L SO-8 package.  
PA4220 requires few external components for its operation,  
working from low to medium supply voltages of up to 5V. The  
ramp time of the supply should be greater than 50ms.  
APPLICATIONS  
On power-up and power-down the output of the amplifier  
stage is switched to a convenient low impedance voltage rail  
hence muting the amplifiers, preventing the audible pop, which  
is normally heard in the headset or speakers.  
Cell phones  
PDA’s  
Portable DVD players  
Portable MP3 players  
Notebook Audio  
Set-top boxes  
Digital Video Recorders  
LCD TVs  
PA4220 operates as a passive shunt device hence the  
designer does not haveto worry about the device introducing  
any kind ofnoise or distortioninto the system. It has extremely  
low current consumption (<1uA).  
Home Theater systems  
PA4220 is equipped with ESD (Human Body Model)  
protection circuitry on the outputs.  
Pin Layout and Description  
PA4220 is available as an 6L low profile 0.8mm DFN  
package and 8L SO-8 package. It is specified for operation  
over the -40° C to +85°C temperature range.  
Pin#  
Pin #  
Description  
Notes  
DFN-6 SOIC-8  
1
2
1
2
3
4
5
6
7
8
RCS  
GND  
NC  
Power ON delay capacitor  
Ground  
CH1 CH2  
Functional Diagram  
No Connect  
VCC  
PA4220  
3
4
Ch2  
Ch1  
NC  
Channel 2 control signal  
Channel 1 control signal  
No Connect  
Startup  
&
Shutdown  
Control  
5
6
Vcc  
Cap  
Vcc  
Holding capacitor  
C2  
C3  
VCAP  
VCC  
CH1  
C2 = 100μF (Typ.)  
C3 = 1μF (Max.)  
RCS  
1
2
3
4
8
7
6
5
VCAP  
6
5
4
VCC  
GND  
NC  
Ordering Information  
Package  
SOIC-8  
DFN-6  
Temp Range  
Part Number  
NC  
PA4220DQ-T7  
PA4220DN-T7  
1
2
3
CH2  
CH1  
-40 to +85°C  
RCS  
GND  
CH2  
DFN-6  
SOIC-8  
Top View  
Top View  
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715  
www.protekanalog.com  
95027.Rev 0.0 12/10 PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT.  
NOT FOR USE IN LIFE SUPPORT SYSTEMS  

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