Datasheet > LM4546

LM4546

更新时间： 2024-11-10 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		解码器编解码器
页数	文件大小	规格书
18页	311K
描述
AC ’97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM4546 数据手册

February 1999

LM4546

AC ’97 Rev 2 Codec with Sample Rate Conversion and

National 3D Sound

General Description

Key Specifications

The LM4546 is an audio codec for PC systems which is fully

PC98 compliant and performs the analog intensive functions

of the AC97 Rev 2 architecture. Using 18-bit Sigma-Delta

A/D’s and D/A’s, the LM4546 provides 90dB of Dynamic

Range.

n Analog Mixer Dynamic Range

n D/A Dynamic Range

97dB (typ)

89dB (typ)

90dB (typ)

n A/D Dynamic Range

The LM4546 was designed specifically to provide a high

quality audio path and provide all analog functionality in a PC

audio system. It features full duplex stereo A/D’s and D/A’s

and an analog mixer with 2 stereo and 3 mono inputs, each

of which has separate gain, attenuation and mute control.

The LM4546 also provides National’s 3D Sound stereo en-

hancement.

Features

n AC’97 Rev 2 compliant

n National’s 3D Sound circuitry

n High quality Sample Rate Conversion (SRC) from 4kHz

to 48kHz in 1Hz increments

n Multiple Codec support

n Advanced power management support

n Digital 3V and 5V compliant

The LM4546 supports variable sample rate conversion as

defined in the AC97 Rev2 specification. The sample rate for

the A/D and D/A can be programmed separately to convert

any rate between 4kHz - 48kHz with a resolution of 1Hz. The

AC97 architecture separates the analog and digital functions

of the PC audio system allowing both for system design flex-

ibility and increased performance.

Applications

n Desktop PC Audio Systems

n Portable PC Systems

n Mobile PC Systems

Block Diagram

DS100985-1

FIGURE 1. LM4546 Block Diagram

DS100985

www.national.com

12 3 4 5 6 7...18

中文翻译

下载PDF

与LM4546相关器件

型号	品牌	获取价格	描述	数据表
LM4546_09	NSC	获取价格	AC 97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound
LM4546A	NSC	获取价格	AC 97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound
LM4546AVH	NSC	获取价格	AC 97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound
LM4546AVHX	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48
LM4546AVHX	ROCHESTER	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48
LM4546B	NSC	获取价格	AC ’97 Rev 2 Multi-Channel Audio Codec with S
LM4546B	TI	获取价格	AC '97 编解码器（2.1 版），具有采样率转换和 National 3D Sound
LM4546BVH/NOPB	TI	获取价格	AC '97 编解码器（2.1 版），具有采样率转换和 National 3D Sound
LM4546BVH/NOPB	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48, Consumer IC:Othe
LM4546BVHX	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48, Consumer IC:Othe