http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




National Semiconductor Electronic Components Datasheet

LM4920 Datasheet

Stereo Headphone Amplifier

No Preview Available !

LM4920 pdf
www.DataSheet4U.com
March 2006
LM4920
Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW
Stereo Headphone Amplifier
General Description
The LM4920 is a ground referenced, fixed-gain audio power
amplifier capable of delivering 80mW of continuous average
power into a 16single-ended load with less than 1%
THD+N from a 3V power supply.
The LM4920 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.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4920 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 LM4920 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 LM4920 features an internal thermal
shutdown protection mechanism.
The LM4920 contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4920 has an internal fixed gain of 1.5V/V.
Key Specifications
j Improved PSRR at 217Hz
j Power Output at VDD = 3V,
RL = 16, THD % 1%
j Shutdown Current
j Internal Fixed Gain
j Operating Voltage
70dB (typ)
80mW (typ)
0.01µA (typ)
1.5V/V (typ)
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 Mobile Phones
n MP3 Players
n PDAs
n Portable electronic devices
n Notebook PCs
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2006 National Semiconductor Corporation DS201793
www.national.com


National Semiconductor Electronic Components Datasheet

LM4920 Datasheet

Stereo Headphone Amplifier

No Preview Available !

LM4920 pdf
Typical Application
FIGURE 1. Typical Audio Amplifier Application Circuit
201793B8
www.national.com
2


Part Number LM4920
Description Stereo Headphone Amplifier
Maker National Semiconductor
Total Page 17 Pages
PDF Download
LM4920 pdf
Download PDF File
[partsNo] view html
View PDF for Mobile






Related Datasheet

1 LM4920 Stereo Headphone Amplifier National Semiconductor
National Semiconductor
LM4920 pdf
2 LM49200 Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier (Rev. A) Texas Instruments
Texas Instruments
LM49200 pdf
3 LM4921 Low Voltage I2S 16-Bit Stereo DAC with Stereo Headphone Power Amplifiers and Volume Control National Semiconductor
National Semiconductor
LM4921 pdf
4 LM4921 Low Voltage I 2 S 16-Bit Stereo DAC w/Stereo HP Pwr Amp Vol Cntrl (Rev. E) Texas Instruments
Texas Instruments
LM4921 pdf
5 LM4922 80mW Stereo Headphone Amplifier National Semiconductor
National Semiconductor
LM4922 pdf
6 LM4923 1.1 Watt Fully Differential Audio Power Amplifier With Shutdown Select National Semiconductor
National Semiconductor
LM4923 pdf
7 LM4923 1.1W Fully Differential Audio Power Amp w/Shutdown Select (Rev. E) Texas Instruments
Texas Instruments
LM4923 pdf
8 LM4923LQ 1.1 Watt Fully Differential Audio Power Amplifier With Shutdown Select National Semiconductor
National Semiconductor
LM4923LQ pdf
9 LM4924 LM4924 2-Cell Batt 40mW Per Chan Out Cap-Less OCL Stereo Hp Audio Amp (Rev. B) Texas Instruments
Texas Instruments
LM4924 pdf






Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components