Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

LM4922 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM4922
Description  Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier
Download  21 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4922 Datasheet(HTML) 1 Page - National Semiconductor (TI)

  LM4922 Datasheet HTML 1Page - National Semiconductor (TI) LM4922 Datasheet HTML 2Page - National Semiconductor (TI) LM4922 Datasheet HTML 3Page - National Semiconductor (TI) LM4922 Datasheet HTML 4Page - National Semiconductor (TI) LM4922 Datasheet HTML 5Page - National Semiconductor (TI) LM4922 Datasheet HTML 6Page - National Semiconductor (TI) LM4922 Datasheet HTML 7Page - National Semiconductor (TI) LM4922 Datasheet HTML 8Page - National Semiconductor (TI) LM4922 Datasheet HTML 9Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 1 / 21 page
background image
LM4922
Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW
Stereo Headphone Amplifier
General Description
The LM4922 is a ground referenced, fixed-gain audio power
amplifier capable of delivering 80mW of continuous average
power into a 16
Ω single-ended load with less than 1%
THD+N from a 3V power supply.
The LM4922 features a new circuit technology that utilizes a
charge pump to generate a negative reference voltage. This
allows the outputs to be biased about ground, thereby elimi-
nating output-coupling capacitors typically used with normal
single-ended loads.
The LM4922 features an Automatic Standby Mode circuitry
(patent pending). In the absence of an input signal, after
approximately 12 seconds, the LM4922 goes into low cur-
rent standby mode. The LM4922 recovers into full power
operating mode immediately after a signal is applied to either
the left or right input pins. This feature saves power supply
current in battery operated applications.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4922 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
The LM4922 features a low-power consumption shutdown
mode selectable for either channel separately. This is ac-
complished by driving either the SD_RC (Shutdown Right
Channel) or SD_LC (Shutdown Left Channel) (or both) pins
with logic low, depending on which channel is desired shut-
down. Additionally, the LM4922 features an internal thermal
shutdown protection mechanism.
The LM4922 contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4922 has an internal fixed gain of 1.5V/V.
Key Specifications
j Improved PSRR at 217Hz
70dB (typ)
j Power Output at VDD = 3V,
R
L =16
Ω, THD % 1%
80mW (typ)
j Shutdown Current
0.01µA (typ)
j Internal Fixed Gain
1.5V/V (typ)
j Operating Voltage
1.6V to 4.2V
Features
n
Fixed Logic Levels
n
Ground referenced outputs
n
High PSRR
n
Available in space-saving micro SMD package
n
Ultra low current shutdown mode
n
Improved pop & click circuitry eliminates noises during
turn-on and turn-off transitions
n
No output coupling capacitors, snubber networks,
bootstrap capacitors, or gain-setting resistors required
n
Shutdown either channel independently
Applications
n
Notebook PCs
n
Mobile Phone
n
PDAs
n
Portable electronic devices
n
MP3 Players
Boomer® is a registered trademark of National Semiconductor Corporation.
December 2005
© 2005 National Semiconductor Corporation
DS201582
www.national.com


Similar Part No. - LM4922

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
LM4920 NSC-LM4920 Datasheet
1Mb / 17P
   Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier
LM49200 NSC-LM49200 Datasheet
960Kb / 26P
   Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier
logo
Texas Instruments
LM49200 TI1-LM49200 Datasheet
1Mb / 29P
[Old version datasheet]   Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier
logo
National Semiconductor ...
LM49200TL NSC-LM49200TL Datasheet
960Kb / 26P
   Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier
logo
Texas Instruments
LM49200TL/NOPB TI1-LM49200TL/NOPB Datasheet
1Mb / 29P
[Old version datasheet]   Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier
More results

Similar Description - LM4922

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
LM4926 NSC-LM4926 Datasheet
1Mb / 22P
   Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier
LM4920 NSC-LM4920 Datasheet
1Mb / 17P
   Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier
LM48860 NSC-LM48860 Datasheet
423Kb / 18P
   Ground-Referenced, Ultra Low Noise, Fixed Gain Stereo Headphone Amplifier
logo
Texas Instruments
LM48860 TI1-LM48860 Datasheet
1,017Kb / 21P
[Old version datasheet]   Ground-Referenced, Ultra Low Noise, Fixed Gain Stereo Headphone Amplifier
LM48860 TI1-LM48860_14 Datasheet
1,014Kb / 24P
[Old version datasheet]   Ground-Referenced, Ultra Low Noise, Fixed Gain Stereo Headphone Amplifier
LM48820 TI1-LM48820_14 Datasheet
994Kb / 19P
[Old version datasheet]   Ground-Referenced, Ultra Low Noise, Fixed Gain, 95mW Stereo Headphone Amplifier
LM48820 TI1-LM48820 Datasheet
994Kb / 18P
[Old version datasheet]   Ground-Referenced, Ultra Low Noise, Fixed Gain, 95mW Stereo Headphone Amplifier
logo
National Semiconductor ...
LM48820 NSC-LM48820 Datasheet
942Kb / 16P
   Ground-Referenced, Ultra Low Noise, Fixed Gain, 95mW Stereo Headphone Amplifier
LM48861 NSC-LM48861 Datasheet
355Kb / 16P
   Ground-Referenced, Ultra Low Noise, Stereo Headphone Amplifier
logo
Texas Instruments
LM48861 TI1-LM48861_14 Datasheet
845Kb / 20P
[Old version datasheet]   Ground-Referenced, Ultra Low Noise, Stereo Headphone Amplifier
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com