Datasheet > LM4548MDC

LM4548MDC

更新时间： 2024-01-07 12:31:26

品牌	Logo	应用领域
德州仪器 - TI		商用集成电路
页数	文件大小	规格书
17页	308K
描述
IC,SOUNDCARD CIRCUITS,CMOS,DIE

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技术参数
数据手册

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LM4548MDC 技术参数

生命周期：	Obsolete	包装说明：	, DIE OR CHIP
Reach Compliance Code：	unknown	风险等级：	5.84
商用集成电路类型：	CONSUMER CIRCUIT	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装等效代码：	DIE OR CHIP
电源：	5 V	认证状态：	Not Qualified
子类别：	Other Consumer ICs	技术：	CMOS
温度等级：	INDUSTRIAL	Base Number Matches：	1

LM4548MDC 数据手册

September 2000

LM4548

AC ’97 Rev 2 Codec with Sample Rate Conversion and

National 3D Sound

General Description

Key Specifications

The LM4548 is an audio codec for PC systems which is fully

PC98 compliant and performs the analog intensive functions

of the AC97 Rev2 architecture. Using 18-bit Sigma-Delta

A/D’s and D/A’s, the LM4548 provides 90dB of Dynamic

Range.

Analog Mixer Dynamic Range

D/A Dynamic Range

97dB (typ)

89dB (typ)

90dB (typ)

A/D Dynamic Range

The LM4548 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.

The LM4548 also provides the additional True Line-Level

output and National’s 3D Sound stereo enhancement.

Features

n AC’97 Rev2 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 True Line Level Output with volume control in addition to

standard Line Out

n Advanced power management support

n Digital 3V and 5V compliant

The LM4548 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

DS100987-1

FIGURE 1. LM4548 Block Diagram

DS100987

www.national.com

12 3 4 5 6 7...17

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与LM4548MDC相关器件

型号	品牌	获取价格	描述	数据表
LM4548MWC	TI	获取价格	LM4548MWC
LM4548VH	NSC	获取价格	AC ’97 Rev 2 Codec with Sample Rate Conversio
LM4548VH/NOPB	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, TQFP-48
LM4548VHX	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, TQFP-48
LM4548VHX/NOPB	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, TQFP-48
LM4549	NSC	获取价格	AC ’97 Rev 2.1 Codec with Sample Rate Convers
LM4549A	NSC	获取价格	AC ’97 Rev 2.1 Codec with Sample Rate Convers
LM4549AVH	NSC	获取价格	AC ’97 Rev 2.1 Codec with Sample Rate Convers
LM4549AVHX	TI	获取价格	IC,SOUNDCARD CIRCUITS,QFP,48PIN,PLASTIC
LM4549AVHX/NOPB	TI	获取价格	IC,SOUNDCARD CIRCUITS,QFP,48PIN,PLASTIC