IC AMP AUDIO PWR MONO AB 16USMD

LM48557TL/NOPB

Manufacturer Part NumberLM48557TL/NOPB
DescriptionIC AMP AUDIO PWR MONO AB 16USMD
ManufacturerNational Semiconductor
SeriesBoomer®
TypeClass AB
LM48557TL/NOPB datasheet
 

Specifications of LM48557TL/NOPB

Output Type1-Channel (Mono)Voltage - Supply2.7 V ~ 4.5 V
FeaturesDepop, Differential Inputs, I²C, Mute, Shutdown, Volume ControlMounting TypeSurface Mount
Package / Case16-MicroSMDOperational ClassClass-AB
Audio Amplifier Output Configuration1-Channel MonoAudio Amplifier FunctionSpeaker
Single Supply Voltage (typ)Not RequiredVDual Supply Voltage (typ)3V
Power Supply RequirementDualRail/rail I/o TypeNo
Power Supply Rejection Ratio80dBSingle Supply Voltage (min)Not RequiredV
Single Supply Voltage (max)Not RequiredVDual Supply Voltage (min)1.7/2.7V
Dual Supply Voltage (max)4.5VOperating Temp Range-40C to 85C
Operating Temperature ClassificationIndustrialMountingSurface Mount
Pin Count16Package TypeuSMD
Lead Free Status / RoHS StatusLead free / RoHS CompliantMax Output Power X Channels @ Load-
Other namesLM48557TLTR  
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SINGLE-ENDED INPUT CONFIGURATION
Ground-Referenced Audio Source
The LM48557 input stage is compatible with ground-refer-
enced input sources, such as CODECs with an integrated
headphone amplifier. Connect either input, IN+ or IN- to the
FIGURE 9. Single-Ended Input Configuration with a Ground-Referenced Source
NON-GROUND REFERENCED AUDIO SOURCE
Stereo-to-Mono Conversion
The LM48557 can convert a single-ended stereo signal to a
mono BTL signal (Figure 10). Connect the left and right
FIGURE 10. Single-Ended Stereo-to-Mono BTL Conversion
CODEC output, and connect the unused input and VCM to
the CODEC output ground (Figure 9). An input coupling ca-
pacitor in series with the source and device input is recom-
mended to block the CODEC output offset voltage, minimiz-
ing click and pop and zipper noise during volume transitions.
CODEC outputs in parallel through two equal value resistors
to either IN+ or IN-, and connect the unused input and VCM
to the CODEC ground. Select the value of the resistors based
on the desired frequency response created by the combina-
tion of the input resistor and the input coupling capacitor.
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