LM49120 - Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

Features
•RF immunity
•Selectable OCL/SE headphone drivers
•32 Step volume control
•Click and Pop suppression
•Independent speaker and headphone gain settings
•Minimum external components
•Thermal over load protection
•Micro-power shutdown
•Space saving 16–bump mciro SMD package
•Thermal shutdown protection
•Micro-power shutdown
•I 2C Control Interface

Key Specification

■  Output power at VDD = 5V:  
 Speaker:    RL = 8Ω BTL, THD+N ≤ 1% 1.3W (typ)
 Headphone:    RL = 32Ω, SE, THD+N ≤ 1% 85mW (typ)
■  Output power at VDD = 3.6V:  
 Speaker:    RL = 8Ω, BTL, THD+N ≤ 1% 632mW (typ)
■  Output power at VDD = 3.3V:  
 Speaker:    RL = 8Ω, BTL, THD+N ≤ 1% 540mW (typ)
 Headphone:    RL = 32Ω, OCL/SE, THD+N ≤ 1% 35mW (typ)

General Description

The LM49120 is a compact audio subsystem designed for portable handheld applications such as cellular phones. More...


Applications

•Mobile Phones
•PDAs
•Portable Electronics
  Typical Application
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ParametersValues
Power@ 8Ohms, 1% THD .54 Watt
THD 0.015 %
PSRR 83 dB
Channels 3 Channels
THD Conditions f=1kHz, Pout = 12mW, RL=32ohms, SE or OCL HP out, mode 4
PSRR Conditions Vripple = 200mVpp, fripple=217Hz, RL=32ohms, Cb=2.2uF
User Supply 3.3 Volt
Audio Mux Yes
Capless Headphone Yes
ClassD Driver No
Interface I2C
Stereo Inputs 1
National 3D No
Digital Volume Control Max 18 dB
Digital Volume Control Min -86 dB
Output Modes 24
Supply Range +1.4 - +3.6 V
Mono Inputs 1
Temperature Min -40 deg C
Temperature Max 85 deg C
Loudspeaker Type Class AB
Headphone Type Virtual Ground
Automotive No
Loudspeaker Outputs 1


Typical Performance

click for larger image


  Also Recommended
LM49151▲Class D With ALC, Ground Reference Headphone
Connection Diagram
click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM49120   Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier 730
Kbytes		 16-Jul-08 Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM49120TLEVALLM49120 Evaluation BoardFull productionN/A
 
Buy Now 		 CALLN/A-
N/A10
LM49120TLMICRO SMD16NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$1.25reel
of
250		XYTT
I GK2
6 weeksN/A
LM49120TLXMICRO SMD16NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.25reel
of
3000		XYTT
I GK2
12 weeksN/A

General Description

The LM49120 is a compact audio subsystem designed for portable handheld applications such as cellular phones. The LM49120 combines a mono 1.3W speaker amplifier, stereo 85mW/ch output capacitorless headphone amplifier, 32 step volume control, and an input mixer/multiplexer into a single 16–bump micro SMD package.

The LM49120 has three input channels: two single-ended stereo inputs and a differential mono input. Each input features a 32-step digital volume control. The headphone output stage features an 8 step (-18dB – 0dB) attenuator, while the speaker output stage has two selectable (0dB/+6dB) gain settings. The digital volume control and mode control are programmed through a two-wire I 2C compatible interface.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM49120TLCMOS70184060010890004309006723
LM49120TLXCMOS70184060010890004309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


[Information as of 8-Nov-2009]