APA2177(2012) Просмотр технического описания (PDF) - Anpec Electronics
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APA2177 Datasheet PDF : 20 Pages
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APA2177
25mW Stereo Cap-Free Headphone Driver
Features
General Description
• Operating Voltage: 2.4V~5.5V
• Supply Current
- IDD=2.1mA at VDD=3.6V
• Low Shutdown Current
-
IDD=0.7µA
at
V =3.6V
DD
• Ground Reference Output
- No Output Capacitor Required (for DC Blocking)
- Save the PCB Space
- Reduce the BOM Costs
- Improve the Low Frequency Response
• Output Power
25mW/Ch
into
16Ω
at
V =3.6V,THD+N=0.04%
DD
20mW/Ch
into
32Ω
at
V =3.6V,THD+N=0.02%
DD
• High PSRR: 90dB at 217Hz
• Fast Start-Up Time: 4ms
• Integrate the De-pop Circuitry
• Thermal Protection
• Surface-Mount Packaging
WLCSP1.6x1.6-16
Applications
• Handests
• PDAs
• Portable Multimedia Devices
• Notebooks
The APA2177 is a stereo, fixed gain, single supply, and
cap-free headphone driver, which is available in a WLCSP-
16 packages.
The APA2177 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 selectable gain (0dB or 6dB) can minimize
the external component counts and save the PCB space.
High PSRR provides increased immunity to noise and
RF rectification.
The APA2177 is capable of driving 25mW at 3.6V into 16Ω
load and provides thermal protection.
Simplified Application Circuit
Stereo
Input
Signal
RIN-
RIN+
LIN+
LIN-
Shutdown SDN
Control
Gain
Control
Hi-Z
Control
GAIN
HI-Z
APA2177
Stereo
Headphone
ROUT
LOUT
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.
1
Rev. A.1 - Jul., 2012
www.anpec.com.tw
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