LM48903 Datasheet, PDF (1/59 Pages) Texas Instruments – Stereo Class D Spatial Array

LM48903
April 12, 2012
Stereo Class D Spatial Array
General Description
The LM48903 is a stereo Class D amplifier that utilizes TI’s
proprietary spatial sound processor to create an enhanced
sound stage for portable multimedia devices. The Class D
output stages feature National’s edge rate control (ERC)
PWM architecture that significantly reduces RF emissions
while preserving audio quality and efficiency.
The LM48903’s flexible I²S interface is compatible with stan-
dard serial audio interfaces. A stereo differential-input ADC
gives the device the ability to process analog stereo audio
signals.
The LM48903 is configured through an I²C compatible inter-
face and is capable of delivering 1.7W/channel of continuous
output power into an 8Ω load with less than 10% THD+N.
Output short circuit and thermal overload protection prevent
the device from being damaged during fault conditions. Click
and pop suppression eliminates audible transients on power-
up/down and during shutdown. The LM48903 is available in
space saving micro SMD package.
Key Specifications
Features
■ ^{Spatial Sound Processing}
■ ^{I2S Input}
■ ^{Stereo, Analog, Differential-Input ADC}
■ ^{Edge Rate Control}
■ ^{Short Circuit and Thermal Overload Protection}
■ ^{Minimum external components}
■ ^{Click and Pop suppression}
■ ^{Micro-power shutdown}
■ ^{Available in space-saving micro SMD package}
Applications
■ ^{Smart Phones}
■ ^{Portable Gaming}
■ ^Tablets
■ ^{Multimedia Devices}
■ ^{MP3 Player Accessories}
■ SNR (A-Weighted)
■ Output Power/channel, PV_DD = 5V
R_L = 8Ω, THD+N ≤ 1%
■ THD+N
■ Efficiency/Channel
■ PSRR at 217Hz
90dBA (typ)
1.3W (typ)
0.08% (typ)
91% (typ)
69dB (typ)
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© 2012 Texas Instruments Incorporated 301858 SNAS587
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