Texas Instruments Ground Referenced, Fixed-gain Audio Power Amplifier Evaluation Board LM48820TMBD/NOPB LM48820TMBD/NOPB Scheda Tecnica
Codici prodotto
LM48820TMBD/NOPB
SNAS370B – MAY 2007 – REVISED MAY 2013
LM48820
Ground-Referenced, Ultra Low Noise, Fixed
Gain, 95mW Stereo Headphone Amplifier
Check for Samples:
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FEATURES
DESCRIPTION
The LM48820 is a ground referenced, fixed-gain
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•
Available in Space Saving 0.4mm Pitch
audio power amplifier capable of delivering 95mW of
DSBGA Package
continuous average power into a 16
Ω
single-ended
•
Fixed Logic Levels
load, with less than 1% THD+N from a 3V power
•
Ground Referenced Outputs
supply.
•
High PSRR
The LM48820 features a new circuit technology that
utilizes a charge pump to generate a negative
utilizes a charge pump to generate a negative
•
Ultra Low Current Shutdown Mode
reference voltage. This allows the outputs to be
•
Improved Pop and Click Circuitry Eliminates
biased about ground, thereby eliminating output-
Noises During Turn-On and Turn-Off
coupling capacitors typically used with normal single-
Transitions
ended loads.
•
No Output Coupling Capacitors, Snubber
Boomer
audio
power
amplifiers
were
designed
Networks, Bootstrap Capacitors, or Gain-
specifically to provide high quality output power with a
Setting Resistors Required
minimal
number
of
external
components.
The
•
Shutdown Either Channel Independently
LM48820 does not require output coupling capacitors
or bootstrap capacitors, and therefore is ideally suited
or bootstrap capacitors, and therefore is ideally suited
•
Soft Start Feature Reduces Start up Transient
for mobile phone and other portable applications.
Current
The LM48820 features a low-power consumption
APPLICATIONS
shutdown mode selectable for each channel and a
soft start function that reduces start-up current
soft start function that reduces start-up current
•
Mobile Phones
transients. Additionally, the LM48820 features an
•
MP3 Players
internal thermal shutdown protection mechanism.
•
PDAs
The LM48820 contains advanced pop and click
•
Portable electronic devices
circuitry that eliminates noises which would otherwise
•
Notebook PCs
occur during turn-on and turn-off transitions.
The LM48820 has an internal fixed gain of 1.5V/V.
KEY SPECIFICATIONS
•
Improved PSRR at 217Hz: 80dB (typ)
•
Power Output at VDD = 3V, RL = 16
Ω
, THD+N =
1%: 95mW (typ)
•
Shutdown Current: 0.05
μ
A (typ)
•
Internal Fixed Gain: 1.5V/V (typ)
•
Wide Operating Voltage Range: 1.6V to 4.5V
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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PRODUCTION DATA information is current as of publication date.
Copyright © 2007–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.