SGM4890
GENERAL DESCRIPTION
The SGM4890 is a 1.1-W, fully integrated, audio power
amplifier. It is designed to maximize audio performance
in portable applications such as mobile phone. The
portable application requires audio power amplifier has
minimum of external components and can operate from
a single 2.5V to 5.5V power supply. SGM4890 is capable
of delivering 1.1W of continuous output power with less
than 1% distortion（THD + N）when it drives an 8Ω
speaker from a 5.0V power supply.
The SGM4890 features a low-power consumption
shutdown mode, which is achieved by driving the
shutdown pin with a logic low. Additionally, the
SGM4890 features an internal thermal shutdown
protection mechanism.
The SGM4890 does not require
capacitors or bootstrap capacitors,
ideally suited for mobile phone and
applications where minimal power
primary requirement.
output coupling
and therefore is
other low voltage
consumption is a
1.1 Watt Audio Power Amplifier
FEATURES
•
Ideal for Notebook Computers, PDAs, and
Other Small Portable Audio Devices
•
1.1W to 8-Ω BTL Load from 5V Supply at
THD =1% (Typical)
•
Excellent PSRR: Direct Connection to the Battery
•
Fast Turn On Time
•
Unity Gain Stable
•
2.5V to 5.5V Operation
•
Shutdown Current: 0.01µA Typical
•
Shutdown Pin is Compatible with 1.8V Logic
•
–40℃ to +85℃ Operating Temperature Range
•
Small Packaging
PIN CONFIGURATIONS
(Top View)
A
B
C
-IN
V
O1
+IN
For maximum flexibility, the SGM4890 provides an
externally controlled gain (with resistors), as well as an
externally controlled turn-on time (with the bypass
capacitor). When using a 1µF bypass capacitor, it offers
110ms wake up time when V
+
is equal to 5.0V.
The SGM4890 is available in CSP-9 and MSOP-8
packages. It operates over an ambient temperature range
of –40℃ to +85℃.
GND
GND
V
+
Bypass
V
O2
SHDN
1
2
CSP-9
3
APPLICATIONS
Portable Systems
MP3 Players
Mobile Phone
PDAs
GPS
SHDN
1
2
3
4
8
V
O2
Bypass
7
6
5
GND
+IN
V
+
-IN
V
O1
MSOP-8
SG Microelectronics Co, Ltd
Tel: 86/10/51798160/80
www.sg-micro.com
REV. A
ELECTRICAL CHARACTERISTICS : TA = 25℃
PARAMETER
SYMBOL
CONDITIONS
MIN
V
+
= +5V, No Load
V
+
= +5V, 8
Ω
Load
V
+
= +3.6V, No Load
V
+
= +3.6V, 8
Ω
Load
V
+
= +3.0V, No Load
V
+
= +3.0V, 8
Ω
Load
V
+
= +2.6V, No Load
V
+
= +2.6V, 8
Ω
Load
1.2
0.4
1
V
+
= +5V
Output Power (8
Ω)
P
O
f = 1 kHz, THD+N=1%
V
+
= +3.6V
V
+
= +3.0V
V
+
= +2.6V
Total Harmonic Distortion + Noise
THD+N
P
O
= 0.4Wrms, f = 1kHz
V
+
= +5V
f = 217Hz
V
+
= +3.6V
V
+
= +3.0V
Power Supply Rejection Ratio
PSRR
V
+
= +2.6V
V
+
= +5V
f = 1kHz
V
+
= +3.6V
V
+
= +3.0V
V
+
= +2.6V
V
+
= +5V
Wake –up Time
T
WU
C
BYPASS
= 1µF
V
+
= +3.6V
V
+
= +3.0V
V
+
= +2.6V
V
+
= +5V
Shut Down Time
T
SDT
8
Ω
Load
V
+
= +3.6V
V
+
= +3.0V
V
+
= +2.6V
1.10
0.58
0.40
0.30
0.01
-66
-63
-63
-62
-72
-68
-66
-64
110
110
100
100
10
16
17.8
17.8
µs
ms
dB
%
W
50
SGM4890
TYP
4
6
3.7
5.7
3.5
5.5
3.3
5.3
0.01
MAX
8
10
mA
UNITS
Quiescent Power Supply Current
I
Q
V
IN
= 0V, I
O
= 0A,
7
9
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
I
SD
V
SDIH
V
SDIL
V
OS
V
SHUTDOWN
= 0V,
4.0
µA
V
V
mV
Specifications subject to changes without notice.
2
SGM4890
PACKAGE/ORDERING INFORMATION
MODEL
SGM4890
ORDER NUMBER
SGM4890YG/TR
SGM4890YMS/TR
PACKAGE
DESCRIPTION
CSP-9
MSOP-8
PACKAGE
OPTION
Tape and Reel, 3000
Tape and Reel, 3000
MARKING
INFORMATION
4890YG
SGM4890YMS
ABSOLUTE MAXIMUM RATINGS
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Input Voltage . . . . . . . . . . . . . . . . (–V
S
) - 0.3 V to (+V
S
) +0.3V
Storage Temperature Range . . . . . . . . . . . . .–65℃ to +150℃
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 150℃
Operating Temperature Range . . . . . . . . . . . –40℃ to +85℃
Lead Temperature Range (Soldering 10 sec)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260℃
NOTES
1. Stresses above those listed under Absolute Maximum
Ratings may cause permanent damage to the device.
This is a stress rating only; functional operation of the
device at these or any other conditions above those
indicated in the operational section of this specification
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. SG
Micro-electronics 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.
TYPICAL APPLICATION
3
SGM4890
TYPICAL PERFORMANCE CHARACTERISTICS
V
OUT+
or V
OUT-
Large Sine Signal Response
Large Signal Step Response
V
+
= 2.6V
Output Voltage(500mV/div)
Output Voltage(500mV/div)
V
+
= 2.6V
Time(10µs/div)
Time(2µs/div)
V
OUT+
or V
OUT-
Large Sine Signal Response
V
+
= 3V
Output Voltage(500mV/div)
Large Signal Step Response
V
+
= 3V
Output Voltage(500mV/div)
Time(5µs/div)
Time(2µs/div)
V
OUT+
or V
OUT-
Large Sine Signal Response
V
+
= 3.6V
Output Voltage(500mV/div)
Large Signal Step Response
V
+
= 3.6V
Output Voltage(500mV/div)
Time(5µs/div)
Time(2µs/div)
4
SGM4890
TYPICAL PERFORMANCE CHARACTERISTICS
V
OUT+
or V
OUT-
Large Sine Signal Response
V
+
= 5V
Output Voltage(500mV/div)
Large Signal Step Response
V
+
= 5V
Output Voltage(500mV/div)
Time(5µs/div)
Time(5
µ
s/div)
Small Signal Frequency Response
3
V
+
= +5V,3V,2.6V
V
IN
= -10dBm
Normalized Gain(dB)
0
Quiescent Current vs.Temperature
7
6
Quiescent Current(mA)
5
4
3
2
1
V
+
=
3
V
V
+
= 2.6V
V
+
=
5V
V
+
= 3.6V
-3
-6
-9
0.01
0
0.1
1
Frequency(MHz)
10
-40
-20
0
20
40
Temperature(℃)
60
80
Output Offset Voltage vs.Temperature
2
V
+
= 5V
Output Offset Voltage(mV)
Supply Current(mA)
1.6
1.2
0.8
0.4
0
-40
-20
0
20
40
Temperature(℃)
60
80
4
3
2
5
Supply Current vs.Shutdown Voltage
V
+
= 5V
OFF
1
0
-1
0
ON
1
2
Shutdown Voltage(V)
3
5
SGM4890
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