音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LM4550 Datasheet

  • LM4550

  • National Semiconductor [AC ’97 Rev 2.1 Multi-Channel Audio...

  • NSC

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預覽

LM4550 AC 鈥?7 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample
Rate Conversion and National 3D Sound
December 2002
LM4550
AC 鈥?7 Rev 2.1 Multi-Channel Audio Codec with Stereo
Headphone Amplifier, Sample Rate Conversion and
National 3D Sound
General Description
The LM4550 is an audio codec for PC systems which is fully
PC99 compliant and performs the analog intensive functions
of the AC97 Rev2.1 architecture. Using 18-bit Sigma-Delta
A/D鈥檚 and D/A鈥檚, 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 A/D鈥檚 and D/A鈥檚
and an analog mixer with 4 stereo and 3 mono inputs, each
of which has separate gain, attenuation and mute control.
The LM4550 provides a stereo headphone amplifier with an
independent gain control and also supports National鈥檚 3D
Sound stereo enhancement and variable sample rate con-
version. The sample rate for the A/D and D/A can be pro-
grammed separately with a resolution of 1 Hz to convert any
rate between 4 kHz鈥?8 kHz.
The LM4550 features the ability to connect several codecs
together in a system to provide up to six channels for sur-
round sound applications. Multiple codec systems can be
built using the standard AC-Link format of one serial data
stream per codec, or using a unique National Semiconductor
feature for chaining codecs together. This chain feature re-
quires only a single data stream to the controller.
The AC97 architecture separates the analog and digital func-
tions of the PC audio system allowing both for system design
flexibility and increased performance.
Key Specifications
n
n
n
n
Analog Mixer Dynamic Range
D/A Dynamic Range
A/D Dynamic Range
Headphone Amp THD+N at 50 mW
into 32鈩?/div>
97dB
89dB
90dB
0.02%
(typ)
(typ)
(typ)
(typ)
Features
n
AC鈥?7 Rev 2.1 compliant
n
Several LM4550s can be combined together for up to 6
channel operation
n
Unique National chaining function allows multiple codecs
to be connected serially and use only a single controller
SDATA_IN pin
n
High quality Sample Rate Conversion (SRC) from 4 kHz
to 48 kHz in 1 Hz increments.
n
Stereo headphone amp with separate gain control
n
National鈥檚 3D Sound circuitry
n
External Amplifier Power Down (EAPD) control from
codec
n
PC-Beep passthrough to Line Out while reset is held
active low
n
Digital 3.3V and 5V compliant
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
2, 4, or 6 channel systems
漏 2002 National Semiconductor Corporation
DS100972
www.national.com

LM4550 PDF文件相關(guān)型號

LM4550VH

LM4550相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    ETC
  • 英文版
    SOT-23 Precision Centigrade Temperature Sensor
    NATIONAL
  • 英文版
    SOT-23 Precision Centigrade Temperature Sensors
    NSC
  • 英文版
    SOT-23 Precision Centigrade Temperature Sensors
  • 英文版
    SOT-23 Precision Centigrade Temperature Sensors
    NSC
  • 英文版
    SOT-23 Precision Centigrade Temperature Sensors
  • 英文版
    Synchronous Step-Up DC/DC Converter with True Shutdown Isola...
    NATIONAL SEMICONDUCTOR
  • 英文版
    AC ’97 Codec with National 3D Sound
    NSC
  • 英文版
    AC ’97 Codec with National 3D Sound
  • 英文版
    AC ’97 Codec with National 3D Sound
    NSC
  • 英文版
    AC ’97 Codec with National 3D Sound
  • 英文版
    AC ’97 Codec with Stereo Headphone Amplifier and National 3...
    NSC
  • 英文版
    AC ’97 Codec with Stereo Headphone Amplifier and National 3...
  • 英文版
    AC ’97 Rev 2 Codec with Sample Rate Conversion and National...
    NSC
  • 英文版
    AC ’97 Rev 2 Codec with Sample Rate Conversion and National...
  • 英文版
    AC ’97 Rev 2 Codec with National 3D Sound
  • 英文版
    AC ’97 Rev 2 Codec with Sample Rate Conversion and National...
    NSC
  • 英文版
    AC ’97 Rev 2 Codec with Sample Rate Conversion and National...
  • 英文版
    AC ’97 Rev 2.1 Codec with Sample Rate Conversion and Nation...
    NSC
  • 英文版
    AC ’97 Rev 2.1 Codec with Sample Rate Conversion and Nation...

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務：
賣家服務：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！