SGM4895
1.3W Fully Differential
Audio Power Amplifier
GENERAL DESCRIPTION
The SGM4895 is a fully differential audio power amplifier
that is designed for portable communication device
applications and demanding applications in mobile
phones. It is capable of delivering 1.3W of continuous
average power into an 8Ω load with typically 1%
distortion (THD+N) from a 5V battery voltage. It operates
from 2.5V to 5.5V power supply.
The SGM4895 features a low power consumption
shutdown mode. To facilitate this, shutdown may be
enabled by logic low. Additionally, the SGM4895 features
an internal thermal shutdown protection mechanism.
The SGM4895 contains advanced pop/click circuitry, with
a minimal amount of external components. All these
features make SGM4895 ideal for wireless handsets and
other low voltage applications where minimal power
consumption is a primary requirement.
The SGM4895 is available in Green TDFN-3×3-8L and
MSOP-8 (Exposed Pad) packages. It operates over an
ambient temperature range of
-40℃ to +85℃.
FEATURES
Fully Differential Amplifier
Excellent PSRR: Direct Connection to Battery
1.3W into 8Ω Load from 5V Supply at
THD+N = 1% (TYP)
1.6W into 4Ω Load from 5V Supply at
THD+N = 1% (TYP, SGM4895YDB8 Only)
2.5V to 5.5V Operation
Low Shutdown Current
Improved Pop/Click Circuitry
Support Single-Ended or Differential Input
Thermal Overload Protection Circuitry
No Output Coupling Capacitors, Bootstrap
Capacitors Required
External Gain Configuration Capability
-40℃ to +85℃ Operating Temperature Range
Green TDFN-3×3-8L and MSOP-8 (Exposed Pad)
Packages
APPLICATIONS
Portable Systems
Wireless Handsets
Mobile Phone
Handheld Computers
PDAs
GPS
SG Micro Corp
www.sg-micro.com
REV. C. 1
SGM4895
PACKAGE/ORDERING INFORMATION
MODEL
SGM4895
ORDER NUMBER
SGM4895YDB8/TR
SGM4895YPMS8/TR
PACKAGE
DESCRIPTION
TDFN-3×3-8L
MSOP-8 (Exposed Pad)
1.3W Fully Differential
Audio Power Amplifier
PACKAGE
OPTION
Tape and Reel, 3000
Tape and Reel, 3000
MARKING
INFORMATION
SGM4895DB
SGM4895YPMS8
ABSOLUTE MAXIMUM RATINGS
Supply Voltage……………………………………………………6V
Input Voltage.................................................-0.3V to (V
+
) + 0.3V
Storage Temperature Range ……….…………..-65℃ to +150℃
Junction Temperature………………………………………..150℃
Operating Temperature Range…………………...-40℃ to +85℃
Lead Temperature Range (Soldering 10 sec)
………………………………………………………………….260℃
ESD Susceptibility
HBM……………………………………………………….……2000V
MM………………………………………………………………400V
NOTE:
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 in the
operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay
attention to ESD protection. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failure to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure. Precision
integrated circuits may be more susceptible to damage because
very small parametric changes could cause the device not to
meet its published specifications.
SGMICRO reserves the right to make any change in circuit
design, specification or other related things if necessary without
notice at any time. Please contact SGMICRO sales office to get
the latest datasheet.
PIN CONFIGURATIONS
(TOP VIEW)
SGM4895YDB8
SHDN
Bypass
IN
2
IN
1
1
8
SGM4895YPMS8
V
O2
GND
V
+
V
O1
SHDN
Bypass
IN
2
IN
1
1
8
V
O2
GND
V
+
V
O1
2
7
2
GND
3
6
3
4
5
4
GND
7
6
5
TDFN-3×3-8L
MSOP-8 (Exposed Pad)
SG Micro Corp
www.sg-micro.com
2
SGM4895
1.3W Fully Differential
Audio Power Amplifier
ELECTRICAL CHARACTERISTICS
(The following AC specifications apply for 8Ω load, A
V
= 1V/V, T
A
= +25℃, unless otherwise specified.)
PARAMETER
Supply Voltage
Shutdown Current
Output Offset Voltage
SYMBOL
V
+
I
SD
V
OS
CONDITIONS
V
IN
= 0V, V
SHDN
= GND
V
IN
= 0V, V
SHDN
= V
+
= 5.0V
V
IN
= 0V, V
SHDN
= V
+
= 3.3V
V
IN
= 0V, V
SHDN
= V
+
= 2.6V
V
+
= 5.0V, No Load
V
+
= 5.0V, 8Ω Load
V
+
= 3.3V, No Load
V
+
= 3.3V, 8Ω Load
V
+
= 2.6V, No Load
V
+
= 2.6V, 8Ω Load
1.2
0.4
V
+
= 5.0V
V
+
= 3.6V
f = 1kHz
THD+N = 1%
V
+
= 3.0V
V
+
= 2.6V
V
+
= 5.0V
V
+
= 3.6V
f = 1kHz
THD+N = 10%
V
+
= 3.0V
V
+
= 2.6V
V
+
= 5.0V
f = 1kHz
V
+
= 3.6V
THD+N = 1%
V
+
= 3.0V
SGM4895YDB8 only
V
+
= 2.6V
V
+
= 5.0V
f = 1kHz
V
+
= 3.6V
THD+N = 10%
V
+
= 3.0V
SGM4895YDB8 only
V
+
= 2.6V
P
O
= 0.6Wrms, f = 1kHz, V
+
= 5.0V
V
+
= 5.0V
V
+
= 3.6V
f = 217Hz
V
+
= 3.0V
V
+
= 2.6V
V
+
= 5.0V
V
+
= 3.6V
f = 1kHz
V
+
= 3.0V
V
+
= 2.6V
f = 217Hz, V
CM
= 200mV
P-P
, V
+
= 5.0V
V
+
= 5.0V
V
+
= 3.6V
C
B
= 1μF
V
+
= 3.0V
V
+
= 2.6V
1.30
0.65
0.45
0.34
1.60
0.82
0.55
0.42
1.60
1.00
0.65
0.50
2.20
1.25
0.85
0.60
0.015
-83
-80
-73
-65
-83
-80
-73
-65
-76
50
42
37
32
MIN
2.5
-10
-10
TYP
0.01
2.5
2.0
2.0
4.70
4.75
3.87
3.90
3.20
3.22
MAX
5.5
1
10
10
7.50
8.00
5.80
6.00
UNITS
V
μA
mV
Quiescent Power Supply Current
I
Q
V
IN
= 0V, I
O
= 0A,
V
SHDN
= V
+
mA
Shutdown Voltage Input High
Shutdown Voltage Input Low
V
SDIH
V
SDIL
V
Output Power (8Ω)
P
O
W
Output Power (4Ω)
P
O
W
Total Harmonic Distortion + Noise
THD+N
%
Power Supply Rejection Ratio
(1) (2)
PSRR
dB
Common Mode Rejection Ratio
Wake-Up Time
(2)
CMRR
T
WU
dB
ms
NOTES:
1. 10Ω terminated input.
2. PSRR and CMRR are affected by the matching between gain-setting resistor ratios.
SG Micro Corp
www.sg-micro.com
3
SGM4895
1.3W Fully Differential
Audio Power Amplifier
TYPICAL PERFORMANCE CHARACTERISTICS
At T
A
= +25℃, A
V
= 1, f = 1kHz, C
B
= 1µF, unless otherwise noted.
THD+N vs. Output Power
10
V
+
= 5.0V
R
L
= 8Ω
BW < 80kHz
THD+N (%)
10
V
+
= 3.6V
R
L
= 8Ω
BW < 80kHz
THD+N vs. Output Power
1
THD+N (%)
1
0.1
0.1
0.01
0.01
0.001
0.01
0.1
1
10
0.001
0.01
0.1
1
10
Output Power (W)
Output Power (W)
THD+N vs. Output Power
10
V
+
= 3.0V
R
L
= 8Ω
BW < 80kHz
THD+N vs. Output Power
10
V
+
= 2.6V
R
L
= 8Ω
BW < 80kHz
1
THD+N (%)
1
THD+N (%)
0.1
0.1
0.01
0.01
0.001
0.01
0.1
Output Power (W)
1
0.001
0.01
0.1
Output Power (W)
1
Power Dissipation vs. Output Power
0.8
Power Dissipation (W)
Power Dissipation vs. Output Power
0.4
Power Dissipation (W)
0.6
0.3
0.4
V
+
= 5.0V
R
L
= 8Ω
BW
<
80kHz
THD+N
≤
1%
0
0
0.2
0.4
0.6
0.8
1
1.2
1.4
Output Power (W)
0.2
V
+
= 3.6V
R
L
= 8Ω
BW < 80kHz
THD+N
≤
1%
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.2
0.1
0
Output Power (W)
SG Micro Corp
www.sg-micro.com
4
SGM4895
1.3W Fully Differential
Audio Power Amplifier
TYPICAL PERFORMANCE CHARACTERISTICS
At T
A
= +25℃, A
V
= 1, f = 1kHz, C
B
= 1µF, unless otherwise noted.
Power Dissipation vs. Output Power
0.3
Power Dissipation vs. Output Power
0.2
Power Dissipation (W)
Power Dissipation (W)
0.15
0.2
0.1
V
+
= 2.6V
R
L
= 8Ω
BW < 80kHz
THD+N
≤
1%
0
0.1
0.2
0.3
0.4
0.5
0.1
V
+
= 3.0V
R
L
= 8Ω
BW < 80kHz
THD+N
≤
1%
0
0.1
0.2
0.3
0.4
0.5
0.6
0.05
0
Output Power (W)
0
Output Power (W)
Power Supply Rejection Ratio vs. Frequency
-40
-40
Power Supply Rejection Ratio vs. Frequency
-60
PSRR (dB)
PSRR (dB)
-60
-80
V
+
= 5.0V, R
L
= 8Ω
Input 10Ω Terminated
200mV
P-P
0.1
1
Frequency (kHz)
10
100
-80
V
+
= 3.0V, R
L
= 8Ω
Input 10Ω Terminated
200mV
P-P
0.1
1
Frequency (kHz)
10
100
-100
-100
-120
0.01
-120
0.01
Common Mode Rejection Ratio vs. Frequency
-20
-40
CMRR (dB)
-60
-80
-100
-120
0.01
V
+
= 5.0V, R
L
= 8Ω
Input 10Ω Terminated
200mV
P-P
0.1
1
Frequency (kHz)
10
100
THD+N (%)
THD+N vs. Frequency
1
0.1
0.01
V
+
= 5.0V, R
L
= 8Ω
P
O
= 600mW
No filters
0.1
1
10
Frequency (kHz)
100
0.001
0.01
SG Micro Corp
www.sg-micro.com
5
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