APA2172
Stereo, Differential Input Cap-Free Line Driver
Features
General Description
The APA2172 is a stereo, differential input, single supply,
and cap-free line driver, which is available in SOP-14 and
TSSOP-14 packages.
The APA2172 is ground-reference output, and doesn’
t
need the output capacitors for DC blocking. The advan-
tages of eliminating the output capacitor are saving the
cost, eliminating component height, and improving the
low frequency response.
The external gain setting is recommended using from
±1V/V
to
±10V/V.
High PSRR provides increased immu-
nity to noise and RF rectification. APA2172 has shutdown
and under-voltage detector function for Depop solution.
The APA2172 is capable of driving 2.1V
rms
at 3.3V into
2.5kΩ load, and provides short-circuit and thermal pro-
tection.
•
•
•
Operating Voltage: 2.3V~5.5V
Differential Input
Ground Reference Output
-
No Output Capacitor Required (for DC Blocking)
-
Save the PCB Space
-
Reduce the BOM Costs
-
Improve the Low Frequency Response
Low Noise and THD+N
-
SNR > 108dB
-
Noise < 8µV
rms
-
THD+N < 0.02% at 20Hz~20kHz
Output Voltage Swing Can Reach 2.1Vrms/Ch into
2.5kΩ at V
DD
=3.3V
High PSRR: 80dB at 217Hz
Fast Start-up Time: 500µs
Integrate the De-Pop Circuitry
Thermal and Short-Circuit Protection
Surface-Mount Packaging
-
SOP-14
-
TSSOP-14
Lead Free and Green Devices Available
(RoHS Compliant)
•
•
•
•
•
•
•
•
Simplified Application Circuit
Applications
Stereo
Input Signal
APA2172
Stereo
Line-Out
Signal
•
•
•
•
Set-Top Boxes
CD/DVD Players
LCD TVs
HTIBs (Home Theater in Box)
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.8 - Aug., 2013
1
www.anpec.com.tw
APA2172
Pin Configuration
RINP 1
RINN 2
ROUT 3
GND 4
SDN 5
APA2172
14 LINP
13 LINN
12 LOUT
11 UVP
10 PGND
9 VDD
8 CPP
TSSOP-14
(Top View)
RINP 1
RINN 2
ROUT 3
GND 4
SDN 5
APA2172
14 LINP
13 LINN
12 LOUT
11 UVP
10 PGND
9 VDD
8 CPP
SOP-14
(Top View)
VSS 6
CPN 7
VSS 6
CPN 7
Ordering and Marking Information
APA2172
Assembly Material
Handling Code
Temperature Range
Package Code
APA2172 O :
APA2172 K :
APA2172
XXXXX
APA2172
XXXXX
Package Code
O : TSSOP-14 K : SOP-14
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
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).
Absolute Maximum Ratings
Symbol
V
PGND
_
GND
V
DD
V
SDN
V
SS
V
OUT
V
CPP
V
CPN
T
J
T
STG
T
SDR
P
D
PGND to GND Voltage
(Note 1)
Rating
-0.3 to 0.3
-0.3 to 6.0
V
GND
-0.3 to V
DD
+0.3
-6.0 to 0.3
V
SS
-0.3 to V
DD
+0.3
V
PGND
-0.3 to V
DD
+0.3
V
SS
-0.3 to V
PGND
+0.3
150
-65 to +150
260
Internally Limited
W
o
Parameter
Unit
Supply Voltage (VDD to GND and PGND)
Input Voltage (SDN to GND)
VSS to GND and PGND Voltage
ROUT and LOUT to GND Voltage
CPP to PGND Voltage
CPN to PGND Voltage
Maximum Junction Temperature
Storage Temperature Range
Maximum Soldering Temperature Range, 10 Seconds
Power Dissipation
V
C
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2013
2
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APA2172
Thermal Characteristics
Symbol
θ
JA
Parameter
Thermal Resistance - Junction to Ambient
(Note 2)
TSSOP-14
SOP-14
120
120
Typical Value
Unit
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.
Recommended Operating Conditions
Symbol
V
DD
V
IH
V
IL
T
A
T
J
R
L
Supply Voltage
High Level Threshold Voltage
Low Level Threshold Voltage
Operating Ambient Temperature Range
Operating Junction Temperature Range
Load Resistance
SDN
SDN
Parameter
Min.
2.3
1.0
-
-40
-40
16
Range
Max.
5.5
-
0.35
85
125
100k
o
o
Unit
V
C
C
Ω
Electrical Characteristics
V
DD
=3.3V, V
GND
=V
PGND
=0V, V
SDN
=V
DD
, C
CPF
=C
CPO
=1µF, C
i
=1µF, R
L
=2.5kΩ, T
A
=25 C, R
i
=10kΩ, R
f
=20kΩ (unless other-
wise noted)
Symbol
I
DD
I
SD
I
l
Parameter
V
DD
Supply Current
V
DD
Shutdown Current
Input Current
V
SDN
=0V
SDN
Test Conditions
Min.
-
-
-
APA2172
Typ.
10
1
0.1
Max.
15
5
-
mA
µA
µA
Unit
o
CHARGE PUMP
f
OSC
R
eq
DRIVERS
A
VO
GW
V
SR
V
OS
V
N
T
start-up
PSRR
C
L
V
ESD
Open Loop Voltage Gain
Unity Gain Bandwidth
Slew Rate
Output Offset Voltage
Output Noise
Start-up Time
V
DD
=2.3V to 5.5V, V
rr
=200mV
rms
f
in
= 217Hz
f
in
= 1kHz
f
in
= 20kHz
V
DD
=2.3V to 5.5V, R
L
= 2.5kΩ
R
i
=10kΩ, R
f
=10kΩ
80
8
-
-5
-
-
100
10
4.5
-
8
500
-80
-80
-50
220
8
-
-
-
5
15
-
-60
-60
-45
-
-
dB
MHz
V/µs
mV
µV
rms
µs
dB
pF
kV
Switching Frequency
Equivalent Resistance
400
-
500
21
600
25
kHz
Ω
Power Supply Rejection Ratio
Maximum Capacitive Load
ESD Protection
-
-
OUTR, OUTL
-
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2013
3
www.anpec.com.tw
APA2172
Electrical Characteristics (Cont.)
V
DD
=3.3V, V
GND
=V
PGND
=0V, V
SDN
=V
DD
, C
CPF
=C
CPO
=1µF, C
i
=1µF, R
L
=2.5kΩ, T
A
=25 C, R
i
=10kΩ, R
f
=20kΩ (unless other-
wise noted)
Symbol
Parameter
Test Conditions
Min.
V
O
Output Voltage (Stereo, In
Phase)
THD+N=1%, f
in
=1kHz
R
L
=2.5kΩ
R
L
=100kΩ
THD+N=1%, f
in
=1kHz
R
L
=32Ω
P
O
Output Power (Stereo, In
Phase)
VDD=5V
THD+N=1%, f
in
=1kHz
R
L
=32Ω
V
O
=2V
rms
, R
L
=2.5kΩ
f
in
=20Hz
f
in
=1kHz
f
in
=20kHz
Po=10mW, RL=32Ω,f
in
=1kHz
VDD=5V, Po=30mW, RL=32Ω,
f
in
=1kHz
Crosstalk
Channel Separation
V
O
=2V
rms
, R
L
=2.5kΩ
f
in
=20Hz
f
in
=1kHz
f
in
=20kHz
V
O
=2Vrms, R
L
=2.5kΩ, R
i
=10kΩ,
R
f
=10kΩ,
With A-weighting Filter
-
40
-
2.0
-
APA2172
Typ.
2.1
2.3
Max.
-
V
Unit
o
-
15
-
mW
-
THD+N
Total Harmonic Distortion Plus
Noise
0.02
0.001
0.02
0.03
0.03
100
100
90
108
150
-
0.002
-
-
-
%
-
-
-
-
dB
S/N
T
SD
Signal to Noise Ratio
Thermal Shutdown Protection
Temperature
102
-
-
-
dB
o
C
UVP FUNCTION
V
UVP
I
HYS
External Under Voltage
Detection
External Under Voltage
Detection Hysteresis Current
-
-
1.25
5.0
-
-
V
µA
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2013
4
www.anpec.com.tw
APA2172
Typical Operating Characteristics
THD+N vs. Output Power
10
In phase
R
L
=32Ω
Cin=2.2
µ
f=1kHz
Av=2V/V
10
THD+N vs. Output Power
1
1
THD+N (%)
THD+N (%)
V
DD
=3.3V
0.1
V
DD
=5V
out phase
R
L
=32Ω
Cin=2.2
µ
f=1kHz
Av=2V/V
V
DD
=3.3V
0.1
V
DD
=5V
0.01
0
10
20
30
40
50
60
0.01
0
20
40
60
80
100
Output Power (mW)
Output Power (mW)
THD+N vs. Output Voltage
10
In phase
R
L
=600Ω
Cin=2.2
µ
f=1kHz
Av=2V/V
V
DD
=2.3V
0.1
V
DD
=3.3V
10
THD+N vs. Output Voltage
In phase
R
L
=10kΩ
Cin=2.2
µ
f=1kHz
Av=2V/V
V
DD
=3.3V
0.1
V
DD
=2.3V
0.01
V
DD
=5V
1
1
THD+N (%)
0.01
V
DD
=5V
THD+N (%)
4
0.001
0.001
0
1
2
3
0
1
2
3
4
Output Voltage (V)
Output Voltage (V)
THD+N vs. Output Voltage
10
In phase
R
L
=100kΩ
Cin=2.2
µ
f=1kHz
Av=2V/V
THD+N vs. Frequency
1
In phase
V
DD
=3.3V
R
L
=32Ω
Cin=2.2
µ
Av=2V/V
Po=1mW
1
0.1
V
DD
=2.3V
0.01
V
DD
=3.3V
THD+N (%)
THD+N (%)
0.1
Po=5mW
0.01
Po=10mW
V
DD
=5V
0.001
0
1
2
3
4
0.002
20
100
1k
10k 20k
Output Voltage (V)
Frequency (Hz)
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2013
5
www.anpec.com.tw
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