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LM4937 데이터시트(PDF) 1 Page - Texas Instruments

부품명 LM4937
상세설명  Audio Sub-System with OCL Stereo Headphone Output and RF Suppression
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LM4937 데이터시트(HTML) 1 Page - Texas Instruments

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LM4937
www.ti.com
SNAS369J – OCTOBER 2006 – REVISED MAY 2013
LM4937
Audio Sub-System with OCL Stereo Headphone
Output and RF Suppression
Check for Samples: LM4937
1
FEATURES
DESCRIPTION
The LM4937 is an integrated audio sub-system
234
18-Bit Stereo DAC
designed for mono voice, stereo music cell phones
Multiple Distinct Output Modes
connecting to base band processors with mono
Mono Speaker Amplifier
differential analog voice paths. Operating on a 3.3V
supply,
it
combines
a
mono
speaker
amplifier
Stereo Headphone Amplifier
delivering
520mW
into
an
8
load,
a
stereo
Mono Earpiece Amplifier
headphone amplifier delivering 36mW per channel
Differential Mono Analog Input
into a 32
Ω load, and a mono earpiece amplifier
delivering 55mW into a 32
Ω load. It integrates the
Independent Loudspeaker, Headphone and
audio amplifiers, volume control, mixer, and power
Mono Earpiece Volume Controls
management control all into a single package. In
I2C/SPI (Selectable) Compatible Interface
addition, the LM4937 routes and mixes the single-
Ultra Low Shutdown Current
ended stereo and differential mono inputs into
multiple distinct output modes. The LM4937 features
Click and Pop Suppression Circuit
an I2S serial interface for full range audio and an I2C
™or SPI compatible interface for control. The full
APPLICATIONS
range music path features an SNR of 85dB with a
Cell Phones
192kHz playback.
PDAs
Boomer™ audio power amplifiers are designed
specifically to provide high quality output power with a
KEY SPECIFICATIONS
minimal amount of external components.
POUT, BTL, 8Ω, 3.3V, 1%: 520 mW (typ)
POUT H/P, 32Ω, 3.3V, 1%: 36 mW (typ)
POUT Mono Earpiece, 32Ω, 1%: 55 mW (typ)
Shutdown current: 0.6µA (typ)
SNR (DAC + Amplifier): 85 dB (typ)
1
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.
2
Boomer is a trademark of Texas Instruments.
3
I2C is a trademark of NXP.
4
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2013, 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.


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