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LM4935 데이터시트(PDF) 1 Page - Texas Instruments

부품명 LM4935
상세설명  Audio Power Amplifier Series Audio Sub-System with Dual-Mode Stereo Headphone & Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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LM4935 데이터시트(HTML) 1 Page - Texas Instruments

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LM4935, LM4935RLEVAL
www.ti.com
SNAS296E – OCTOBER 2005 – REVISED MAY 2013
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
Introduction
1.1
Features
1234
• 18-Bit Stereo DAC
• 115 mW Earpiece Amplifier at 3.3V
• 16-Bit Mono ADC
• Differential Audio I/O for External Cellphone
Module
• 12-Bit 4 Input Multipurpose SAR ADC
• Mono Differential Auxiliary Output
• 8 kHz to 48 kHz Stereo Audio Playback
• Stereo Auxiliary Inputs
• 8 kHz to 48 kHz Mono Recording
• Differential Microphone Input for Internal
• 1 Hz to 13.888 kHz Sample Rate on all 4 SAR
Microphone
Channels
• Flexible Audio Routing from Input to Output
• Bidirectional PCM/I2S Compatible Audio
Interface
• 32 Step Volume Control for Mixers with 1.5 dB
Steps
• Sigma-Delta PLL for Operation from any Clock
at any Sample Rate
• 16 Step Volume Control for Microphone in 2 dB
Steps
• Low Power Clock Network Operation if 12 MHz
System Clock is Available
• Programmable Sidetone Attenuation in 3 dB
Steps
• Read/write I2C or SPI Compatible Control
Interface
• DC Volume Control
• 33mW Stereo Headphone Amplifier at 3.3V
• Two Configurable GPIO Ports
• OCL or AC-coupled Headphone Operation
• Programmable Voltage Triggers on SAR
Channels
• Automatic Headphone & Microphone Detection
• Multi-function IRQ Output
• Support for Internal and External Microphones
• Micro-power Shutdown Mode
• Automatic Gain Control for Microphone Input
• Available in the 4 x 4 mm 49-Bump DSBGA
• High Efficiency BTL 8
Ω Amplifier, 600 mW @
Package
3.3V
1.2
Key Specifications
567
– LS_VDD & A_VDD = 2.7V to 5.5V
• PHP (AC-COUP) @ A_VDD = 3.3V, 32Ω, 1% THD: 33
mW
• PLS @ LS_VDD = 3.3V, 8Ω, 1% THD: 600 mW
• PHP (OCL) @ A_VDD = 3.3V, 32Ω, 1% THD: 31 mW
• Shutdown Current: 1.1 µA
• PLS @ LS_VDD = 5V, 8Ω, 1% THD: 1.3 W
• PSRR @ 217 Hz, A_VDD = 3.3V, (Headphone): 60
dB
• PLS @ LS_VDD = 4.2V, 8Ω, 1% THD: 900 mW
• SNR (Stereo DAC to AUXOUT): 88 dB (typ)
• Supply Voltage Range
• SNR (Mono ADC from Cell Phone In): 90 dB
– BB_VDD = 1.8V to 4.5V,
(typ)
– D_VDD & PLL_VDD = 2.7V to 4.5V
• SNR (Aux In to Headphones): 98 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.
5
Boomer is a trademark of Texas Instruments.
6
I2C is a trademark of NXP.
7
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products conform to
Copyright © 2005–2013, Texas Instruments Incorporated
specifications per the terms of the Texas Instruments standard warranty. Production
processing does not necessarily include testing of all parameters.


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