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PDF LM4811 Data sheet ( Hoja de datos )
| Número de pieza | LM4811 | |
| Descripción | DUAL 105mW HEADPHONE AMPLIFIER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LM4811 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
LM4811
Preliminary
DUAL 105mW HEADPHONE
AMPLIFIER WITH DIGITAL
VOLUME CONTROL AND
SHUTDOWN MODE
DESCRIPTION
The UTC LM4811 is a dual audio power amplifier with digital
volume control and shutdown mode function. It is featured in
unity-gain stability. The digital volume control sets the amplifier’s
gain from +12dB to -33dB in 16 discrete steps using a two-wire
interface. The shutdown mode is externally controlled, active-high
and micropower consumption. An internal thermal shutdown
protection circuit is contained in the device.
Operating on a 5V power supply, it can drive 16Ω load at
105mW per channel of continuous average power with 0.1%
(THD+N).
This device is mainly used to provide customers with higher
quality output power but less required external components. The
UTC LM4811 reduces the use of bootstrap capacitors or snubber
networks that make making it ideal for low-power portable systems
applications.
The UTC LM4811 is generally applied in cellular phones, MP3,
CD, DVD players, PDA’s and other portable electronics.
FEATURES
* Digital volume control range: +12dB~ -33dB
* "Click and Pop" suppression circuitry
* Saving the use of bootstrap capacitors
* Low shutdown current
ORDERING INFORMATION
Ordering Number
LM4811G-SM2-R
Package
MSOP-10
CMOS IC
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
1 of 9
QW-R502-560.b
1 page  
LM4811
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
For VDD=3.3V
PARAMETER
Supply Current
Shutdown Current
Output Offset Voltage
Output Power
Total Harmonic Distortion
Power Supply Rejection Ratio
Input Voltage
High
(Clock, UP/DN, Shutdown) Low
Digital Volume Range
Digital Volume Stepsize
Stepsize Error
Channel-to-Channel Volume
Tracking Error
Shutdown Attenuation
SYMBOL
TEST CONDITIONS
MIN TYP
IDD VIN=0V, IO=0A
1.1
ISD VIN=0V
VOS VIN=0V
0.3
4.0
PO
THD+N=0.1%, f=1kHz
RL=16Ω
RL=32Ω
40
28
THD+N
PSRR
PO=25mW, RL=32Ω, f=20Hz~20kHz
CB=1.0μF,VRIPPLE=100mVPP,
f=217Hz
0.5
60
VIH 1.4
VIL
Input referred minimum gain
-33
Input referred maximum gain
+12
All 16 discrete steps
3.0
All 16 discrete steps
±0.3
MAX
0.4
UNIT
mA
μA
mV
mW
mW
%
dB
V
V
dB
dB
dB
dB
All gain settings from -33dB ~ +12dB
0.15
dB
Shutdown mode active
-100
dB
For VDD=2.6V
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP
Supply Current
Shutdown Current
IDD VIN=0V, IO=0A
ISD VIN=0V
1.0
0.3
Output Offset Voltage
Output Power
Total Harmonic Distortion
VOS
PO
THD+N
VIN=0V
THD+N=0.1%, f=1kHz
RL=16Ω
RL=32Ω
PO=15mW, RL=32Ω, f=20Hz~20kHz
4.0
20
16
0.6
Power Supply Rejection Ratio
PSRR
CB=1.0μF,VRIPPLE=100mVPP,
f=217Hz
60
Input Voltage
High
(Clock, UP/DN, Shutdown) Low
Digital Volume Range
VIH
VIL
Input referred minimum gain
Input referred maximum gain
1.4
-33
+12
Digital Volume Stepsize
All 16 discrete steps
3.0
Stepsize Error
All 16 discrete steps
±0.3
Channel-to-Channel Volume
Tracking Error
All gain settings from -33dB ~ +12dB
0.15
Shutdown Attenuation
Shutdown mode active
-75
Notes: 4. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
5. All voltages are measured with respect to the ground pin, unless otherwise specified.
MAX
0.4
UNIT
mA
μA
mV
mW
mW
%
dB
V
V
dB
dB
dB
dB
dB
dB
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 9
QW-R502-560.b
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LM4811.PDF ] | |
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