LM4930

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SNAS212C – JULY 2003 – REVISED MAY 2013

LM4930 Boomer™ Audio Power Amplifier Series Audio Subsystem with Stereo

Headphone & Mono Speaker Amplifiers

Check for Samples: LM4930

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FEATURES

DESCRIPTION

The LM4930 is an integrated audio subsystem that

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16-bit Resolution 48kHz Stereo DAC

supports voice and digital audio functions. The

•

16-bit Resolution 8kHz Voice Codec

•

a voice band codec, a stereo headphone amplifier

and a high-power mono speaker amplifier. It is

•

Two-wire Serial Control Interface

primarily designed for demanding applications in

•

PCM Voice Audio Data Serial Interface

mobile phones and other portable devices.

•

25mW/channel Stereo Headphone Amplifier

•

330mW Mono 8

range audio, a 16-bit PCM bi-directional serial

•

32-step Volume Control for Audio Output

interface for the voice band codec and an two-wire

Amplifiers

interface for control. The full range music path

features an SNR of 86dB with a 16-bit 48kHz input.

•

No Snubber Networks or Bootstrap Capacitors

The stereo DAC can also be used while the voice

are Required by the Headphone or Hands-free

codec is in use. The headphone amplifier delivers

Amplifiers

•

Digital Sidetone Generation with Adjustable

Attenuation

The mono speaker amplifier delivers up to 330mW

into an 8

Ω load with less than 1% distortion when

•

Gain Controllable Headphone Amp, Mono BTL

Amp, Mic Preamp

The LM4930 employs advanced techniques to reduce

•

Available in the 36–bump DSBGA and 44–lead

power consumption, to reduce controller overhead

WQFN Packages

and to eliminate click and pop. Boomer audio power

amplifiers were designed specifically to provide high

APPLICATIONS

quality output power with a minimal amount of

•

Mobile Phones

external components. It is, therefore, ideally suited for

mobile phone and other low voltage applications

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Mobile/low Power Audio Appliances

where minimal power consumption is a primary

•

PDAs

requirement.

KEY SPECIFICATIONS

•

(typ)

•

330mW (typ)

•

25mW (typ)

•

Supply Voltage Range

–

–

•

Total Shutdown Current 2

μA (typ)

•

(1)

Best operation is achieved by maintaining 3.0V

and 3.0V

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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.

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Boomer is a trademark of Texas Instruments Incorporated.

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All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2013, 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.