APA2176/2176A
270mW Stereo Cap-Free Headphone Driver
Features
General Description
The APA2176/2176A is a stereo, fixed gain, and cap-free
headphone driver which is available in TQFN4x4 20-pin,
TQFN3x3 16-pin (APA2176A) or TSSOP-16 package. Dual
supply voltage provides higher efficiency and better power
ripple rejection.
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No Output Capacitor Required
Dual Supply Voltage (PVDD>VDD)
– VDD=1.8 ~5.5V
– PVDD=2.2 ~ 5.5V
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Meeting VISTA Requirements
Output Power
The APA2176/2176A is designed with ground-reference
output and no need the output capacitors for DC blocking.
The advantages of eliminating the output capacitor are
saving the cost, PCB’s space, and component height.
The built-in gain setting can minimize the external com-
ponent counts and save the PCB space. High PSRR pro-
vides increased immunity to noise and RF rectification. In
addition to these features, a fast start-up time and small
package size make the APA2176/2176A an ideal choice
for portable multimedia devices.
at 1%THD+N
-200mW, at VDD=3.3V, PVDD=5.0V, RL=16W
-55mW, at VDD=1.8V, PVDD=3.0V, RL=16W
at 10%THD+N
-270mW, at VDD=3.3V, PVDD=5.0V, RL=16W
-70mW, at VDD=1.8V, PVDD=3.0V, RL=16W
Less External Components Required
High PSRR: 80dB at 217Hz
Fast Start-Up Time : 120ms
Short-Circuit and Thermal Protection
Surface-Mount Package
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Moreover, the APA2176/2176A is also equipped other
features. For example, at THD+N=1%, it is capable of
driving 200mW at VDD=3.3V, PVDD=5.0V into 16W. In
addition, it provides thermal and short circuit protections.
– TQFN4x4-20B (with Enhanced Thermal Pad)
– TSSOP-16
Simplified Application Circuit
– TQFN3x3-16 (with Enhanced Thermal Pad)
(for APA2176A)
R-CH
Input
RIN
LIN
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Lead Free and Green Devices Available
(RoHS Compliant)
Stereo
Headphone
ROUT
LOUT
L-CH
Input
Applications
APA2176/2176A
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Headsets
RSD
LSD
PDAs
Shutdown
Control
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 ã ANPEC Electronics Corp.
1
www.anpec.com.tw
Rev. A.7 - Jan., 2013