LM49321 - Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
•18-bit stereo DAC with up to 192kHz sampling rate
•Multiple distinct output modes
•Mono class AB speaker amplifier
•Stereo OCL/SE headphone amplifier
•Mono earpiece amplifier
•Differential mono analog input
•Single-ended analog inputs
•Independent loudspeaker, headphone and mono earpiece volume controls
•I 2C/SPI (selectable) compatible interface
•Ultra low shutdown current
•Click and Pop Suppression circuit

Key Specification

■  POUT LS, 8Ω, 3.3V, 1% THD+N 520mW (typ)
■  POUT HP, 32Ω, 3.3V, 1% THD+N 36mW (typ)
■  POUT Mono Earpiece, 32Ω   1% THD+N 55mW (typ)
■   Shutdown current 0.6µA (typ)
■   SNR (DAC + Amplifier) 85dB (typ)

General Description

The LM49321 is an integrated audio sub-system designed for mono voice, stereo music cell phones connecting to base band processors with mono differential analog voice paths. More...


Applications

•Cell Phones
•PDAs
•Laptop computers
•Portable devices
 

ParametersValues
Power@ 8Ohms, 1% THD .520 Watt
THD .01 %
PSRR 76 dB
SNR 85 dB
Channels 2 Channels
THD Conditions Headphone; Po =10mW;f=1kHz;32R SE
PSRR Conditions Mode 2 LS. AVDD = 3.0; frip=217Hz; Vrip =200mVp-p;Cb=2.2uF. All gains =0dB
SNR Conditions Gains set to 0dB
User Supply 5 Volt
Audio Mux Yes
Capless Headphone Yes
ClassD Driver No
Interface I2C SPI I2S
Stereo Inputs 1
National 3D No
Digital Volume Control Max 5 dB
Digital Volume Control Min 56 dB
Output Modes 7
Supply Range +2.7 - +5.5 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
PowerWise No
A/D Channels 0 Channels
D/A Channels 2


Typical Performance

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  Block Diagram
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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM49321 Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression 1489
Kbytes		 1-Sep-09 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
LM49321RLMICRO SMDXT36NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$2.99reel
of
250		XYTT
I GK9
12 weeksN/A
LM49321RLXMICRO SMDXT36NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$2.99reel
of
1000		XYTT
I GK9
6 weeksN/A

General Description

The LM49321 is an integrated audio sub-system designed for mono voice, stereo music cell phones connecting to base band processors with mono differential analog voice paths. Operating on a 3.3V supply, it combines a mono speaker amplifier delivering 520mW into an 8Ω load, a stereo headphone amplifier delivering 36mW per channel into a 32Ω load, and a mono earpiece amplifier delivering 55mW into a 32Ω load. The headphone amplifier can be configured for output capacitor-less (OCL) or single-ended (SE) mode. It integrates the audio amplifiers, volume control, mixer, and power management control all into a single package. In addition, the LM49321 routes and mixes the single-ended stereo and differential mono inputs into multiple distinct output modes. The LM49321 features an I 2S serial interface for full range audio and an I 2C or SPI compatible interface for control. The full range music path features an SNR of 85dB with up to 192kHz playback.

Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM49321RLCMOS70184060010890004309006723
LM49321RLXCMOS70184060010890004309006723

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 7-Nov-2009]