Datasheet > LM4546BVH/NOPB

LM4546BVH/NOPB

更新时间： 2024-11-21 20:10:07

品牌	Logo	应用领域
美国国家半导体 - NSC		商用集成电路
页数	文件大小	规格书
30页	591K
描述
IC SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48, Consumer IC:Other

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LM4546BVH/NOPB 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	LFQFP, QFP48,.35SQ,20	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.03	其他特性：	ALSO REQUIRES 3V TO 5.5V SUPPLY
商用集成电路类型：	CONSUMER CIRCUIT	JESD-30 代码：	S-PQFP-G48
JESD-609代码：	e3	长度：	7 mm
湿度敏感等级：	3	功能数量：	1
端子数量：	48	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	LFQFP	封装等效代码：	QFP48,.35SQ,20
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE, FINE PITCH
峰值回流温度（摄氏度）：	260	电源：	3.3/5,5 V
认证状态：	Not Qualified	座面最大高度：	1.4 mm
子类别：	Other Consumer ICs	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	4.2 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	40
宽度：	7 mm	Base Number Matches：	1

LM4546BVH/NOPB 数据手册

May 2004

LM4550

AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo

Headphone Amplifier, Sample Rate Conversion and

National 3D Sound

General Description

Key Specifications

n Analog Mixer Dynamic Range

n DAC Dynamic Range

n ADC Dynamic Range

n Headphone Amp THD+N at 50 mW

into 32Ω

97 dB (typ)

89 dB (typ)

90 dB (typ)

0.02% (typ)

The LM4550 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 LM4550 provides 90 dB of Dynamic

Range.

The LM4550 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 ADCs and DACs

and analog mixers with access to 4 stereo and 4 mono

inputs. Each mixer input has separate gain, attenuation and

mute control and the mixers drive 1 mono and 2 stereo

outputs, each with attenuation and mute control. The

LM4550 provides a stereo headphone amplifier as one of its

stereo outputs and also supports National’s 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 com-

pletely deterministic to ease task scheduling and application

software development. These features together with an ex-

tended temperature range also make the LM4550 suitable

for non-PC codec applications.

Features

n AC ’97 Rev 2.1 compliant

n High quality Sample Rate Conversion from 4 kHz to 48

kHz in 1 Hz increments

n Supports up to 6 DAC channel systems with multiple

LM4550s or with other National LM45xx codecs

n Unique National chaining function shares a single

controller SDATA_IN pin among multiple codecs

n Stereo headphone amp with separate gain control

n National’s 3D Sound stereo enhancement circuitry

n Advanced power management support

n External Amplifier Power Down (EAPD) control

n PC Beep passthrough to Line Out during Initialization or

Cold Reset

n Digital 3.3V and 5V supply options

n Extended Temperature: −40˚C ≤ T_A≤ 85˚C

The LM4550 features the ability to connect several codecs

together in a system to provide up to 6 simultaneous chan-

nels of streaming data on Output Frames (Controller to

Codec) for surround sound applications. Such systems can

also support up to 8 simultaneous channels of streaming

data on Input Frames (Codec to Controller). Multiple codec

systems can be built either using the standard AC Link

configuration (i.e. of one serial data signal to the Controller

per codec) or using a unique National Semiconductor fea-

ture for chaining codecs together. This chain feature shares

only a single data signal to the controller among multiple

codecs.

Applications

n Desktop PC audio systems on PCI cards, AMR cards, or

with motherboard chips sets featuring AC Link

n Portable PC systems as on MDC cards, or with a

chipset or accelerator featuring AC Link

n General Audio Frequency Systems requiring 2, 4 or 6

DAC channels and/or up to 8 ADC channels

The AC ’97 architecture separates the analog and digital

functions of the PC audio system allowing both for system

design flexibility and increased performance.

DS100972

www.national.com

12 3 4 5 6 7...30

中文翻译

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与LM4546BVH/NOPB相关器件

型号	品牌	获取价格	描述	数据表
LM4546BVHX	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, PQFP48, 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48, Consumer IC:Othe
LM4546BVHX/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
LM4546MWC	TI	获取价格	IC SPECIALTY CONSUMER CIRCUIT, UUC, WAFER, Consumer IC:Other
LM4546VH	NSC	获取价格	AC ’97 Rev 2 Codec with Sample Rate Conversio
LM4546VH/NOPB	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP48, TQFP-48
LM4546VHX	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP48, TQFP-48
LM4546VHX/NOPB	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PQFP48, TQFP-48
LM4547VH	ETC	获取价格	Soundcard Circuits
LM4548	NSC	获取价格	AC ’97 Rev 2 Codec with Sample Rate Conversio
LM4548A	NSC	获取价格	AC ’97 Rev 2 Multi-Channel Audio Codec with S

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