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LM48860
www.ti.com
SNAS398D –JANUARY 2008–REVISED MAY 2013
LM48860 Ground-Referenced, Ultra Low Noise, Fixed Gain
Stereo Headphone Amplifier
Check for Samples: LM48860
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FEATURES
DESCRIPTION
The LM48860 is a ground referenced, fixed-gain
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• Fixed Logic Levels with Supply Voltage
audio power amplifier capable of delivering 40mW per
• Ground Referenced Outputs
channel of continuous average power into a 16Ω
• High PSRR
single-ended load with less than 1% THD+N from a
3V power supply.
• Available in Space-Saving DSBGA Package
• Ultra Low Current Shutdown Mode
The LM48860 features a new circuit technology that
utilizes a charge pump to generate a negative
• Improved Pop & Click Circuitry Eliminates
reference voltage. This allows the outputs to be
Noises During Turn-On and Turn-Off
biased about ground, thereby eliminating output-
Transitions
coupling capacitors typically used with normal single-
• No Output Coupling Capacitors, Snubber
ended loads.
Networks, Bootstrap Capacitors, or Gain-
Boomer audio power amplifiers were designed
Setting Resistors Required
specifically to provide high quality output power with a
• Shutdown Either Channel Independently
minimal amount of external components. The
LM48860 does not require output coupling capacitors
APPLICATIONS
or bootstrap capacitors, and therefore is ideally suited
for mobile phone and other low voltage applications
• Mobile Phones
where minimal power consumption is a primary
• MP3 Players
requirement.
• PDAs
The LM48860 features a low-power consumption
• Portable Electronic Devices
shutdown mode selectable for either channel
separately. This is accomplished by driving either the
• Notebook PCs
SD_RC (Shutdown Right Channel) or SD_LC
(Shutdown Left Channel) (or both) pins with logic low,
KEY SPECIFICATIONS
depending on which channel is desired shutdown.
• PSRR at 217Hz (V
DD
= 3.0V): 80dB (typ)
Additionally, the LM48860 features an internal
• Stereo Power Output at V
DD
= 3V, R
L
= 16Ω, thermal shutdown protection mechanism.
THD+N = 1%: 40mW (typ)
The LM48860 contains advanced pop & click circuitry
• Shutdown Current 0.1μA (typ)
that eliminates noises which would otherwise occur
during turn-on and turn-off transitions.
• Internal Fixed Gain: 1.5V/V (typ)
• Operating Voltage: 2.0V to 5.5V
The LM48860 has an internal fixed gain of 1.5V/V.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2013, 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.
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