APA2181
Low Supply Current, 50mW Stereo Cap-Free Headphone Driver
Features
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•
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Operating Voltage: 2.3V~5.5V
Supply Current
- I
DD
=1mA at V
DD
=3.6V
Low Shutdown Current
- I
DD
=5µA at V
DD
=3.6V
Ground Reference Output
- No Output Capacitor Required (for DC Blocking)
- Save the PCB Space
- Reduce the BOM Costs
- Improve the Low Frequency Response
General Description
The APA2181 is a stereo, fixed gain, single supply, and
cap-free headphone driver, which is available in a
WLCSP1.6x1.6-12 package.
The APA2181 is ground-reference output, and no need
the output capacitors for DC blocking. The advantages of
eliminating the output capacitor are saving the cost, elimi-
nating component height, and improving the low frequency
response.
The internal fixed gain setting (-1.5V/V) can minimize the
external component counts and save the PCB space. High
PSRR provides increased immunity to noise and RF
rectification. LDO is the best solution for microphone
detection circuit requirement, and it can lower the total
BOM costs.
The APA2181 is capable of driving 50mW at 3.6V into16Ω
load, and provides thermal protection.
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Output Power 50mW/Ch into 16Ω at V
DD
=3.6V
High PSRR: 80dB at 217Hz
Fast Start-Up Time: 4ms
Integrate the De-pop Circuitry
Thermal Protection
Integrated LDO (Low Dropout Regulator) for
Microphone Detection Circuit (1.9V)
Surface-Mount Packaging
WLCSP1.6x1.6-12
Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
Stereo
Headphone
Stereo
Input
Signal
Shutdown
Control
RIN
LIN
ROUT
APA2181
SDN
LOUT
LOUT To Microphone
Detection Circuit
Applications
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Handsets
PDAs
Portable Multimedia Devices
Notebooks
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
©
ANPEC Electronics Corp.
Rev. A.2 - Apr., 2010
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
