LM4545

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		解码器编解码器放大器
页数	文件大小	规格书
16页	330K
描述
AC ’97 Codec with Stereo Headphone Amplifier 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

LM4545 数据手册

PRELIMINARY

July 1999

LM4545

AC ’97 Codec with Stereo Headphone Amplifier and

National 3D Sound

General Description

Key Specifications

The LM4545 is an audio codec for PC systems which per-

forms the analog-intensive function of the Analog Codec ’97

Rev 1.03 Architecture. Using 18-Bit Σ∆ A/D and D/A convert-

ers, the LM4545 provides 90dB of dynamic range.

n Analog Mixer Dynamic Range

n D/A Dynamic Range

95dB (typ)

89dB (typ)

90dB (typ)

0.02% (typ)

n A/D Dynamic Range

The LM4545 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 4 stereo and 3 mono inputs, each

of which has separate gain, attenuation and mute control. In

addition, the LM4545 provides a stereo headphone amplifier

with an independent gain control and National’s 3D Sound

stereo enhancement technology.

n Headphone THD+N at 50mW into 32Ω

Features

n Audio Codec ’97 compliant

n Stereo 18-Bit Σ∆ A/D’s and D/A’s with 128X

oversampling

n Stereo headphone amp with separate gain control

n National’s 3D Sound circuitry

n Power management support

The LM4545 features AC-Link, a synchronous, fixed rate se-

rial bus for connection to the digital AC ’97 Controller. The

separation of the analog and digital functions of the AC ’97

architecture allows for system design flexibility and in-

creased overall performance.

n Digital Interface 3V and 5V compliant

Applications

n Desktop PC Audio Systems

n Portable PC Audio Systems

n Mobile PC Audio Solutions

Block Diagram

DS100069-1

FIGURE 1. LM4545 Block Diagram

DS100069

www.national.com

12 3 4 5 6 7...16

中文翻译

下载PDF

与LM4545相关器件

型号	品牌	获取价格	描述	数据表
LM4545VH	NSC	获取价格	AC ’97 Codec with Stereo Headphone Amplifier
LM4545VHX	ETC	获取价格	Soundcard Circuits
LM4546	NSC	获取价格	AC ’97 Rev 2 Codec with Sample Rate Conversio
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