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
APA2176/2176A
Ordering and Marking Information
APA2176
APA2176A
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QB : TQFN4x4-20B O : TSSOP-16
QB : TQFN3x3-16 (APA2176A)
Operating Ambient Temperature Range
I : -40 to 85
o
C
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device
XXXXX - Date Code
APA2176
QB :
APA2176
XXXXX
APA2176
XXXXX
APA
2176A
XXXXX
APA2176
O:
XXXXX - Date Code
APA2176A
QB :
XXXXX - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Pin Configuration
11 ROUT
14 RSD
11 RSD
15 RIN
12 RIN
13 LIN
10 LIN
12 NC
9 ROUT
NC 16
GND 17
LSD 18
PVDD 19
NC 20
CP+ 1
PGND 2
CP- 3
NC 4
CVSS 5
10 VDD
9 LOUT
NC 13
GND 14
LSD 15
PVDD 16
8 VDD
7 LOUT
APA2176
8 NC
7 VSS
6 NC
APA2176A
6 VSS
5 CVSS
CP+ 1
PGND 2
CP- 3
TQFN4x4-20B (Top View)
TQFN3x3-16 (Top View)
=Thermal Pad (connected the Thermal Pad to ground plane for better heat dissipation)
NC 1
PVDD 2
NC 3
CP+ 4
PGND 5
CP- 6
CVSS 7
VSS 8
APA2176
16 LSD
15 GND
14 RIN
13 RSD
12 LIN
11 ROUT
10 VDD
9 LOUT
TSSOP-16 (Top View)
Copyright
©
ANPEC Electronics Corp.
Rev. A.7 - Jan., 2013
2
www.anpec.com.tw
NC 4
APA2176/2176A
Absolute Maximum Ratings
(Note 1)
(Over operating free-air temperature range unless otherwise noted.)
Symbol
V
DD
PV
DD
V
PGND
_
GND
V
RSD
, V
LSD
V
SS
, CV
SS
V
ROUT
, V
LOUT
V
CP+
V
CP-
T
J
T
STG
T
SDR
Supply Voltage (VDD to GND)
Charge Pump Supply Voltage (PVDD to PGND)
PGND to GND Voltage
Input Voltage (RSD and LSD to GND)
VSS and CVSS to GND and PGND Voltage
ROUT and LOUT to GND Voltage
CP+ to PGND Voltage
CP- to PGND Voltage
Maximum Junction Temperature
Storage Temperature Range
Maximum Lead Soldering Temperature, 10 Seconds
Parameter
Rating
-0.3 to 6
-0.3 to 6
-0.3 to 0.3
-0.3 to V
DD
+0.3
-6 to 0.3
V
SS
-0.3 to V
DD
+0.3
-0.3 to PV
DD
+0.3
CV
SS
-0.3 to 0.3
150
-65 to +150
260
Unit
V
V
V
V
V
V
V
V
ο
ο
ο
C
C
C
P
D
Power Dissipation
Internally Limited
W
Note1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are
stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recom-
mended operating conditions" is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability.
Thermal Characteristics
(Note 2,3)
Symbol
θ
JA
Junction-to-Case Resistance in Free Air
TQFN3x3-16
TQFN4x4-20B
10
8
Parameter
Junction-to-Ambient Resistance in Free Air
TQFN3x3-16
TQFN4x4-20B
TSSOP16
55
43
100
o
Typical Value
Unit
C/W
θ
JC
o
C/W
Note 2: Please refer to “Thermal Pad Consideration”. 2 layered 5 in2 printed circuit boards with 2oz trace and copper through several
thermal vias. The thermal pad is soldered on the PCB.
Note 3: The case temperature is measured at the center of the exposed pad on the underside of the TQFN3x3-16 and TQFN4x4-20B
packages.
Recommended Operating Conditions
(Note 4)
Symbol
V
DD
PV
DD
V
IH
V
IL
V
ICM
T
A
T
J
R
L
Supply Voltage
Charge Pump Power Supply Voltage
High Level Threshold Voltage
Low Level Threshold Voltage
Common Mode Input Voltage
Ambient Temperature
Junction Temperature
Headphone Resistance
RSD, LSD
RSD, LSD
Parameter
Range
1.8 ~ 5.5
2.2 ~ 5.5
0.6PV
DD
~ PV
DD
0 ~ 0.3PV
DD
~ V
DD
-1
-40 ~ 85
-40 ~ 125
14 ~
Unit
V
V
V
V
V
o
o
C
C
Ω
Note 4: Refer to the typical application circuit.
Copyright
©
ANPEC Electronics Corp.
Rev. A.7 - Jan., 2013
3
www.anpec.com.tw
APA2176/2176A
Electrical Characteristics
Unless otherwise specified, these specifications apply over V
DD
=3.3V, PV
DD
=5V, V
PGND
=V
GND
=0V, and C
CPO
=C
CPF
=2.2µF. Typical
values are at T
A
=25
o
C.
Symbol
SUPPLY CURRENT
I
DD
I
PVDD
I
SD(VDD)
I
SD(PVDD)
V
DD
Supply Current
PV
DD
Supply Current
V
DD
Shutdown Current
PV
DD
Shutdown Current
V
RSD
= V
LSD
= 0
V
RSD
= V
LSD
= 0
-
-
-
-
2.0
3.2
1.0
1.0
4.0
6.5
5.0
5.0
mA
mA
µA
µA
Parameter
Test Conditions
APA2176/2176A
Min.
Typ.
Max.
Unit
CHARGE PUMP
f
OSC
Req
Switching Frequency
Charge Pump Equivalent
Resistance
C
CPO
=C
CPF
=2.2µF
450
6
510
7
570
9
kHz
Ω
POWER-ON-RESET
Rising VDD Threshold
Falling VDD Threshold
AMPLIFIERS
Av
∆A
V
R
i
SR
C
L
T
start-up
Internal Voltage Gain
Gain Match
Input Resistance
Slew Rate
Maximum Capacitive Load
Start-Up Time from Shutdown
No Load
-1.55
-
12
-
-
-
-1.5
1.0
14
2.5
400
120
-1.45
-
16
-
-
-
V/V
%
kΩ
V/µs
pF
µs
PV
DD
=5V
PV
DD
=5V
1.67
1.57
1.7
1.6
1.73
1.63
V
V
V
DD
=3.3V, PV
DD
=5.0V, T
A
=25°
C
THD+N = 1%, f
in
=1kHz, in Phase
R
L
= 16Ω
R
L
= 32Ω
THD+N = 10%, f
in
=1kHz, in Phase
R
L
= 16Ω
R
L
= 32Ω
f
in
= 1kHz
P
O
= 140mW, R
L
= 16Ω
P
O
= 105mW, R
L
= 32Ω
V
O
= 1.7Vrms, R
L
= 10kΩ
f
in
= 1kHz
P
O
= 140mW, R
L
= 16Ω
V
O
= 1.7Vrms, R
L
= 10kΩ
R
L
= 16Ω, f
in
=217Hz
R
L
= 32Ω
With A-weighting Filter
P
O
= 105mW, R
L
= 32Ω
R
L
= 32Ω
200
150
270
200
0.04
0.03
0.002
78
90
90
-
95
15
-
mW
-
P
O
Output Power
125
170
-
THD+N
Total Harmonic Distortion Plus
Noise
-
%
Crosstalk
PSRR
V
OS
S/N
Vn
Channel Separation
Power Supply Rejection Ratio
Output Offset Voltage
Signal to Noise Ratio
Noise Output Voltage
-
-
-5
-
-
-
-
5
-
-
dB
dB
mV
dB
µV
(rms)
Copyright
©
ANPEC Electronics Corp.
Rev. A.7 - Jan., 2013
4
www.anpec.com.tw
APA2176/2176A
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over V
DD
=3.3V, PV
DD
=5V, V
PGND
=V
GND
=0V, and C
CPO
=C
CPF
=2.2µF. Typical
values are at T
A
=25
o
C.
Symbol
Parameter
Test Conditions
APA2176/2176A
Min.
V
DD
=1.8V, PV
DD
=3.0V, T
A
=25°
C
THD+N = 1%, f
in
=1kHz, in Phase
R
L
= 16Ω
R
L
= 32Ω
THD+N = 10%, f
in
=1kHz, in Phase
R
L
= 16Ω
R
L
= 32Ω
f
in
= 1kHz
P
O
= 40mW, R
L
= 16Ω
P
O
= 30mW, R
L
= 32Ω
V
O
= 0.9Vrms, R
L
= 10kΩ
f
in
= 1kHz
P
O
= 40mW, R
L
= 16Ω
V
O
= 0.9Vrms, R
L
= 10kΩ
R
L
= 16Ω, f
in
=217Hz
R
L
= 32Ω
With A-weighting Filter
P
O
= 30mW, R
L
= 32Ω
R
L
= 32Ω
55
40
70
55
0.04
0.03
0.002
78
90
82
-
95
15
-
mW
-
Typ.
Max.
Unit
P
O
Output Power
35
45
-
THD+N
Total Harmonic Distortion Plus Noise
-
%
Crosstalk
PSRR
V
OS
S/N
Vn
Channel Separation
Power Supply Rejection Ratio
Output Offset Voltage
Signal to Noise Ratio
Noise Output Voltage
-
-
-5
-
-
-
-
5
-
-
dB
dB
mV
dB
µV
(rms)
Copyright
©
ANPEC Electronics Corp.
Rev. A.7 - Jan., 2013
5
www.anpec.com.tw
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