APA2176 Datasheet, PDF (1/28 Pages) Anpec Electronics Coropration – 270mW Stereo Cap-Free Headphone Driver

APA2176/2176A
270mW Stereo Cap-Free Headphone Driver
Features
• No Output Capacitor Required
• Dual Supply Voltage (PV >V )
DD 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 =3.3V,
DD
PV =5.0V,
DD
R_L=16Ω
-55mW,
at
V =1.8V,
DD
PV =3.0V,
DD
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)
Applications
• Headsets
• PDAs
• Portable Multimedia Devices
• Notebooks
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’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.
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.
Simplified Application Circuit
R-CH
RIN
Input
L-CH
Input
LIN
APA2176/2176A
RSD
Shutdown
Control ^LSD
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.7 - Jan., 2013
www.anpec.com.tw