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.
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’ space, and component height.
s
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.
Moreover, the APA2176/2176A is also equipped other
features. For example, at THD+N=1%, it is capable of
driving 200mW at V
DD
=3.3V, PV
DD
=5.0V into 16Ω. In
addition, it provides thermal and short circuit protections.
•
•
•
•
No Output Capacitor Required
Dual Supply Voltage (PV
DD
>V
DD
)
– V
DD
=1.8 ~5.5V
– PV
DD
=2.2 ~ 5.5V
Meeting VISTA Requirements
Output Power
at 1% THD+N
-200mW, at V
DD
=3.3V, PV
DD
=5.0V, R
L
=16Ω
-55mW, at V
DD
=1.8V, PV
DD
=3.0V, R
L
=16Ω
at 10% THD+N
-270mW, at V
DD
=3.3V, PV
DD
=5.0V, R
L
=16Ω
-70mW, at V
DD
=1.8V, PV
DD
=3.0V, R
L
=16Ω
Less External Components Required
High PSRR: 80dB at 217Hz
Fast Start-Up Time : 120µs
Short-Circuit and Thermal Protection
Surface-Mount Package
– TQFN4x4-20B (with Enhanced Thermal Pad)
– TSSOP-16
– TQFN3x3-16 (with Enhanced Thermal Pad)
(for APA2176A)
Lead Free and Green Devices Available
(RoHS Compliant)
•
•
•
•
•
Simplified Application Circuit
R-CH
Input
RIN
Stereo
Headphone
•
Applications
L-CH
Input
LIN
ROUT
•
•
•
•
APA2176/2176A
Headsets
PDAs
Portable Multimedia Devices
Notebooks
Shutdown
Control
RSD
LSD
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.
Rev. A.7 - Jan., 2013
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
