LM4935_14 Datasheet, PDF (1/91 Pages) Texas Instruments – Audio Power Amplifier Series Audio Sub-System with Dual-Mode Stereo Headphone & Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose

LM4935, LM4935RLEVAL
www.ti.com
SNAS296D – OCTOBER 2005 – REVISED MARCH 2006
LM4935 Boomer™ Audio Power Amplifier Series Audio Sub-System with Dual-Mode
Stereo Headphone & Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose
ADC
Check for Samples: LM4935, LM4935RLEVAL
1 1 Introduction
1.1 Features
123
• 18-Bit Stereo DAC
• 16-Bit Mono ADC
• 12-Bit 4 Input Multipurpose SAR ADC
• 8 kHz to 48 kHz Stereo Audio Playback
• 8 kHz to 48 kHz Mono Recording
• 1 Hz to 13.888 kHz Sample Rate on all 4 SAR
Channels
• Bidirectional PCM/I²S Compatible Audio
Interface
• Sigma-Delta PLL for Operation from any Clock
at any Sample Rate
• Low Power Clock Network Operation if 12 MHz
System Clock is Available
• Read/write I²C or SPI Compatible Control
Interface
• 33mW Stereo Headphone Amplifier at 3.3V
• OCL or AC-coupled Headphone Operation
• Automatic Headphone & Microphone Detection
• Support for Internal and External Microphones
• Automatic Gain Control for Microphone Input
• High Efficiency BTL 8Ω Amplifier, 600 mW @
3.3V
• 115 mW Earpiece Amplifier at 3.3V
• Differential Audio I/O for External Cellphone
Module
• Mono Differential Auxiliary Output
• Stereo Auxiliary Inputs
• Differential Microphone Input for Internal
Microphone
• Flexible Audio Routing from Input to Output
• 32 Step Volume Control for Mixers with 1.5 dB
Steps
• 16 Step Volume Control for Microphone in 2 dB
Steps
• Programmable Sidetone Attenuation in 3 dB
Steps
• DC Volume Control
• Two Configurable GPIO Ports
• Programmable Voltage Triggers on SAR
Channels
• Multi-function IRQ Output
• Micro-power Shutdown Mode
• Available in the 4 x 4 mm 49-Bump DSBGA
Package
1.2 Applications
• Smartphones
• Mobile Phones and Multimedia Terminals
• PDAs, Internet Appliances and Portable Gaming
• Portable DVD/CD/AAC/MP3 Players
• Digital Cameras/Camcorders
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.
Boomer is a trademark of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
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 © 2005–2006, Texas Instruments Incorporated