LM49350_15 Datasheet, PDF (1/108 Pages) Texas Instruments – LM49350 Boomer® Audio Power Amplifier Series High Performance Audio Codec Sub-System with a Ground-Referenced Stereo Headphone Amplifier & an Ultra Low EMI Class D Loudspeaker Amplifier with Dual I2S/PCM Digital Audio Interfaces

LM49350, LM49350RLEVAL
www.ti.com
SNAS359D – SEPTEMBER 2008 – REVISED JUNE 2012
LM49350 Boomer® Audio Power Amplifier Series High Performance Audio Codec Sub-
System with a Ground-Referenced Stereo Headphone Amplifier & an Ultra Low EMI Class
D Loudspeaker Amplifier with Dual I²S/PCM Digital Audio Interfaces
Check for Samples: LM49350, LM49350RLEVAL
FEATURES
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•2 High Performance 96dB SNR Stereo DAC
• High Performance 94dB SNR Stereo ADC
• Up to 192kHz Stereo Audio Playback
• Up to 48kHz Stereo Recording
• Dual Bidirectional I²S or PCM Compatible
Audio Interfaces
• Read/Write I²C Compatible Control Interface
• Flexible Digital Mixer with Sample Rate
Conversion
• Dual Sigma-Delta PLLs for Operation from any
Clock at Any Sample rate
• Digital 3D Stereo Enhancement
• Dual 5 Band Parametric Equalizers
• Cascadable DSP Effects that Allow 10 Band
Parametric Equalization
• ALC/Compressor/Limiter on Both DAC and
ADC Paths
• Ultra Low EMI, Class D Loudspeaker Amplifier
with Spread Spectrum Control
• Ground Referenced Output Cap-Less
Headphone Amplifier Operation
• Earpiece Speaker Amplifier with Reduced
Power Consumption Mode for Mono
Differential Line out Applications
• Stereo Auxiliary Inputs or Mono Differential
Input
• Differential Stereo Microphone Inputs with
Single-Ended Option
• Automatic Level Control for Digital Audio
Inputs, Stereo Microphone Inputs, and Stereo
Auxiliary Inputs
• Flexible Audio Routing from Input to Output
• 16 Step Volume Control for Microphones with
2dB Steps
• 32 Step Volume Control for Auxiliary Inputs in
1.5dB Steps
• Micro-Power Shutdown Mode
• Available in the 3.5 x 3.5 mm 36 Bump DSBGA
Package
APPLICATIONS
• Smart Phones
• Mobile Phones and VOIP Phones
• Portable GPS Navigator and Portable Gaming
Devices
• Portable DVD/CD/AAC/MP3/MP4 Players
• Digital Cameras/Camcorders
KEY SPECIFICATIONS
• P_HP at A_V_DD = 3.3V, Stereo 32Ω, 1% THD
69mW/ch (typ)
• P_LS at LS_V_DD = 5V, 8Ω, 1% THD 1.2W (typ)
• P_LS at LS_V_DD = 4.2V, 8Ω, 1% THD 825mW (typ)
• P_LS at LS_V_DD = 3.3V, 8Ω, 1% THD 495mW (typ)
• P_EP at A_V_DD = 3.3V, 32Ω BTL, 1% THD 58mW
(typ)
• Supply Voltage Range
– D_V_DD = 1.7V to 2.0V
– LS_V_DD and A_V_DD = 2.7V to 5.5V
– I/O_V_DD = 1.6V to 4.5V
• SNR (Stereo DAC at 48kHz) 96dB (typ)
• SNR (Stereo ADC at 48kHz) 94dB (typ)
• PSRR at 217 Hz, A_V_DD = 3.3V, (HP from AUX)
97dB (typ)
DESCRIPTION
The LM49350 is a high performance audio subsystem
that supports both analog and digital audio functions.
The LM49350 includes a high quality stereo DAC, a
high quality stereo ADC, a stereo headphone
amplifier that supports ground referenced output cap-
less operation, a dual mode earpiece speaker
amplifier, and a low EMI Class D loudspeaker
amplifier. It is designed for demanding applications in
mobile phones and other portable devices.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2012, Texas Instruments Incorporated