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LM4546BVHX/NOPB PDF预览

LM4546BVHX/NOPB

更新时间： 2023-09-03 20:36:59
品牌 Logo 应用领域
德州仪器 - TI 编解码器
页数 文件大小 规格书
40页 888K
描述
AC '97 编解码器（2.1 版），具有采样率转换和 National 3D Sound | PT | 48 | -40 to 85

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LM4546B  
www.ti.com  
SNOSAI4F –JUNE 2005–REVISED MAY 2013  
LM4546B AC '97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and  
Texas Instruments 3D Sound  
Check for Samples: LM4546B  
The LM4546B was designed specifically to provide a  
high quality audio path and provide all analog  
1
FEATURES  
2
•
AC '97 Rev 2.1 Compliant  
functionality in a PC audio system. It features full  
duplex stereo ADCs and DACs and analog mixers  
with access to 2 stereo and 2 mono inputs. Each  
mixer input has separate gain, attenuation and mute  
control and the mixers drive 1 mono and 1 stereo  
output, each with attenuation and mute control. The  
LM4546B supports Texas Instruments' 3D Sound  
stereo enhancement and a comprehensive sample  
rate conversion capability. The sample rate for the  
ADCs and DACs can be programmed separately with  
a resolution of 1 Hz to convert any rate in the range 4  
kHz – 48 kHz. Sample timing from the ADCs and  
sample request timing for the DACs are completely  
deterministic to ease task scheduling and application  
software development. These features together with  
an extended temperature range also make the  
LM4546B suitable for non-PC codec applications.  
•
High Quality Sample Rate Conversion from 4  
kHz to 48 kHz in 1 Hz Increments  
•
•
Multiple Codec Support  
Texas Instruments' 3D Sound Stereo  
Enhancement Circuitry  
•
•
•
Advanced Power Management Support  
Digital 3.3V and 5V Supply Options  
Extended Temperature: −40°C ≤ TA ≤ 85°C  
APPLICATIONS  
•
Desktop PC Audio Systems on PCI Cards,  
AMR Cards, or with Motherboard Chips Sets  
Featuring AC Link  
•
Portable PC Systems as on MDC Cards, or  
with a Chipset or Accelerator Featuring AC  
Link  
The LM4546B features the ability to connect several  
codecs together using the Extended AC Link  
configuration of one dedicated serial data signal to  
the Controller per codec. LM4546B systems support  
up to 8 simultaneous channels of streaming data on  
Input Frames (Codec to Controller) while Output  
Frames (Controller to Codec) carry 2 streams to  
multiple codecs. The LM4546B may also be used in  
systems with the Texas Instruments LM4550 to  
support up to 6 simultaneous channels of streaming  
data on Output Frames.  
•
•
General and Multi-channel Audio Frequency  
Systems  
Automotive Telematics  
KEY SPECIFICATIONS  
•
•
•
Analog Mixer Dynamic Range 97 dB (typ)  
DAC Dynamic Range 89 dB (typ)  
ADC Dynamic Range 90 dB (typ)  
The AC '97 architecture separates the analog and  
digital functions of the PC audio system allowing both  
for system design flexibility and increased  
performance.  
DESCRIPTION  
The LM4546B is an audio codec for PC systems  
which is fully PC99 compliant and performs the  
analog intensive functions of the AC '97 Rev 2.1  
architecture. Using 18-bit Sigma-Delta ADCs and  
DACs, the LM4546B provides 90 dB of Dynamic  
Range.  
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.  
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 © 2005–2013, Texas Instruments Incorporated  
1234567...40

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LM4546BVHX/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM4546BVH/NOPB TI

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 AC '97 编解码器（2.1 版），具有采样率转换和 National 3D Sound

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