UNISONIC TECHNOLOGIES CO., LTD
PA3112
DUAL 150mW AUDIO POWER
AMPLIFIER
DESCRIPTION
The UTC
PA3112
is a dual audio power amplifier with
differential inputs capable of delivering typically 150mW per
channel of continuous average power to an 16Ω load with less
than 0.1% THD+N using a 5V power supply. The unity-gain stable
UTC
PA3112
can be configured by external gain-setting resistors.
The UTC
PA3112
features an externally controlled, low-power
consumption shutdown mode. The UTC
PA3112
exhibit a low
quiescent current of typically 1.5mA, allowing usage in portable
applications.
CMOS IC
MSOP-10
FEATURES
* Operating voltage range V
DD
=2.5V~5.5V
* Output power:
-150mW @5V into 16Ω
* Differential inputs
* Shutdown mode available
* Low current consumption:3mA max
* click and pop reduction circuitry
* Unity-gain stable
* Thermal and over-current protection
Lead-free:
PA3112L
Halogen-free: PA3112G
ORDERING INFORMATION
Normal
PA3112-SM2-R
PA3112-SM2-T
Ordering Number
Lead Free
PA3112L-SM2-R
PA3112L-SM2-T
Halogen Free
PA3112G-SM2-R
PA3112G-SM2-T
Package
MSOP-10
MSOP-10
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2008 Unisonic Technologies Co., Ltd
1 of 8
QW-R502-100,B
PA3112
PIN CONFIGURATION
CMOS IC
PIN DESCRIPTION
PIN NO
4
5
2
3
8
7
6
10
1
9
PIN NAME
BYPASS
GND
IN1-
IN1+
IN2-
IN2+
SHUTDOWN
V
DD
V
OUT
1
V
OUT
2
I/O
I
I
I
I
I
I
I
I
O
O
DESCRIPTION
Connect to internal voltage divider. For best performance, a 0.1
μF
~ 1
μF
low ESR capacitor used.
Ground
Channel 1 negative input.
Channel 1 positive input.
Channel 2 negative input.
Channel 2 positive input.
Low quiescent current mode enable. High active.
Supply voltage.
Channel 1 audio output.
Channel 2 audio output.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 8
QW-R502-100,B
PA3112
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
V
DD
V
IN
CMOS IC
RATINGS
UNIT
Supply Voltage
6
V
Input Voltage
-0.3~V
DD
~+0.3
V
Continuous Total Power Dissipation
internally limited
℃
Operating Junction Temperature
T
J
-40 ~ +150
℃
Storage Temperature
T
STG
-65 ~ +150
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
High-level Input Voltage
Low-level Input Voltage
SYMBOL
V
DD
V
IH
, (SHUTDOWN)
V
IL
, (SHUTDOWN)
MIN
2.5
0.6×V
DD
TYP
MAX
5.5
0.25×V
DD
UNIT
V
V
V
ELECTRICAL CHARACTERISTICS
(T
A
= 25℃)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DC ELECTRICAL CHARACTERISTICS
Output
Offset
Voltage
Power Supply Rejection Ratio
Supply Current
Supply Current in SHUTDOWN
Mode
Input Impedance
V
O(OFF)
PSRR
I
DD
I
DD(SD)
Z
IN
A
V
= 2 V/V,
V
DD
= 3.2 V ~ 3.4 V
V
DD
= 4.9 V ~ 5.1 V
SHUTDOWN = 0 V,
V
DD
= 2.5 ~ 5.5 V
SHUTDOWN = V
DD
V
DD
= 2.5 ~ 5.5 V
15
83
76
1.5
10
>1
3
50
mV
dB
mA
μA
MΩ
AC OPERATING CHARACTERISTICS (V
DD
= 3.3V, R
L
= 16Ω)
Output Power (Each Channel)
Total Harmonic Distortion + Noise
Maximum Output Power BW
Phase Margin
Supply Ripple Rejection Ratio
Channel/Channel Output Separation
Signal-to-Noise Ratio
Noise Output Voltage
THD
0.1%, f = 1 kHz
P
OUT
THD+N P
OUT
= 40 mW, 20 - 20 kHz
B
OM
G = 10, THD < 5%
Open loop
RR
f = 1 kHz
f = 1 kHz
SNR
P
OUT
= 50 mW, A
V
= 1
eN
A
V
= 1
60
0.4%
>20
96°
71
89
100
11
mW
KHz
dB
dB
dB
μV(rms)
AC OPERATING CHARACTERISTICS (V
DD
= 5V, R
L
= 16Ω)
Output Power (each channel)
Total Harmonic Distortion + Noise
Maximum Output Power BW
Phase Margin
Supply Ripple Rejection Ratio
Channel/Channel Output Separation
Signal-to-Noise Ratio
Noise Output Voltage
P
OUT
THD≤0.1%, f = 1 kHz
THD+N P
OUT
= 100 mW, 20 - 20 kHz
B
OM
G = 10, THD < 5%
Open loop
RR
f = 1 kHz
f = 1 kHz
SNR P
OUT
= 100 mW, A
V
= 1
eN
A
V
= 1
150
0.6%
>20
96°
61
90
100
11.7
mW
KHz
dB
dB
dB
μV(rms)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 8
QW-R502-100,B
PA3112
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
CMOS IC
MAX
UNIT
AC OPERATING CHARACTERISTICS (V
DD
= 3.3V, R
L
= 32Ω)
Output Power (Each Channel)
Total Harmonic Distortion + Noise
Maximum Output Power BW
Phase Margin
Supply Ripple Rejection Ratio
Channel/Channel Output Separation
Signal-to-Noise Ratio
Noise Output Voltage
P
OUT
THD≤ 0.1%, f = 1 kHz
THD+N P
OUT
= 30 mW, 20 - 20 kHz
B
OM
A
V
= 10, THD < 2%
Open loop
RR
f = 1 kHz
f = 1 kHz
SNR P
OUT
= 40 mW, A
V
= 1
eN
A
V
= 1
40
0.4%
>20
96°
71
95
100
11
mW
KHz
dB
dB
dB
μV(rms)
AC OPERATING CHARACTERISTICS (V
DD
= 5V, R
L
= 32Ω)
Output Power (Each Channel)
Total Harmonic Distortion + Noise
Maximum Output Power BW
Phase Margin
Supply Ripple Rejection Ratio
Channel/Channel Output Separation
Signal-to-Noise Ratio
Noise Output Voltage
P
OUT
THD≤ 0.1%, f = 1 kHz
THD+N P
OUT
= 60 mW, 20 - 20 kHz
B
OM
A
V
= 10, THD < 2%
Open loop
RR
f = 1 kHz
f = 1 kHz
SNR P
OUT
= 90 mW, A
V
= 1
eN
A
V
= 1
90
0.4%
>20
97°
61
98
100
11.7
mW
KHz
dB
dB
dB
μV(rms)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 8
QW-R502-100,B
PA3112
TYPICAL APPLICATION CIRCUIT
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 8
QW-R502-100,B
