PA4201_09 Datasheet, PDF (1/8 Pages) Protek Devices – Pop-Up-Noise Killer

ANALOG PRODUCTS DIVISION
PA4201
Pop-Up-Noise Killer
FEATURES
• Extremely Low supply current (<1μA).
• >45dB mute attenuation.
• Shunt operation.
• SOFTMUTE during normal operation.
• Built-in expansion capability, SOFTMUTE out for
driving additional channels.
• Instantaneous. Power-up and Power-down muting.
• ESD protected outputs.
• 1.5V to 2.7V supply operation.
• Compact 2 x 2 x 0.6mm 8 lead DFN.
APPLICATIONS
• Cell phones
• PDA’s
• Portable DVD players
• Portable MP3 players
• Notebook Audio
• Set-top boxes
• Digital Video Recorders
• LCD TVs
• Home Theater systems
Pin Layout
1
2
34
GENERAL DESCRIPTION
PA4201 (PUNK) is a low power (I_CC< 1μA) monolithic
CMOS mixed signal device.
PUNK’s primary function is to control power supply transition
noise in audio circuits and systems.
PUNK boasts several features that make it a “one of a kind”
product on the market. Most prominent is the feature that
allows the designer to implement SOFTMUTE on an audio
line during normal operation. PUNK is an exceptional product
for multi-channel devices as it is capable of expanding the
SOFTMUTE operation into systems s u c h a s Dolby®5.1,
DTS™.
PUNK requires few external components for its operation,
working from low to medium supply voltages of 1.5V to 2.7V.
On power-up and power-down the audio inputs to succeeding
amplifiers are switched to a convenient low impedance voltage
rail. Muting the amplifiers, preventing the audible pop, that is
normally heard in the headset.
PUNK operates as a passive shunt device. So the designer
does not have to worry about the PUNK introducing any kind
of noise or distortion into the system. While consuming less
than 1μA of supply current PUNK provides more than
45dB of mute attenuation at the audio lines.
PUNK is equipped with ESD (Human Body Model) protection
circuitry on the outputs.
PUNK is available as an 8L low profile 0.6mm DFN package
and is specified for operation over the -40° C to +85°C
temperature range.
8
7
65
Typical Application Circuit
Mute Control
Vcc
Right Input
C3 4.7µF
8
Mute2
6
2
PA4201
2X2x0.6mm
5 ^Mute1
3
7
1
4
Left Input
C1 0.1µF
SMUTEOUT
Vcc
R2 220Ω
Right Output
C4 0.22µF
R3 10KΩ
R4 220Ω
Left Output
C5 0.22µF
R5 10KΩ
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: [phone]. Fax: [phone]
95020 Rev.1. 06/09 PATENT PENDING
www.protekanalog.com
NOT FOR USE IN LIFE SUPPORT SYSTEMS