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參數(shù)資料
| 型號： | LM4540 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | Codec |
| 英文描述： | AC ’97 Codec with National 3D Sound |
| 中文描述： | 編解碼器與交流\u0026#39;97全國3D聲音 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 298K |
| 代理商： | LM4540 |
LM4540
AC ’97 Codec with National 3D Sound
General Description
The LM4540 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 LM4540 provides 90dB of dynamic range.
The LM4540 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. In
addition, the LM4540 provides National’s 3D Sound stereo
enhancement technology.
The LM4540 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.
Key Specifications
n
Analog Mixer Dynamic Range
n
D/A Dynamic Range
n
A/D Dynamic Range
95dB (typ)
89dB (typ)
90dB (typ)
Features
n
Audio Codec ’97 compliant
n
Stereo 18-Bit
Σ
A/D’s and D/A’s with 128X
oversampling
n
National’s 3D Sound circuitry
n
Power management support
n
Digital Interface 3V and 5V compliant
Applications
n
PC Audio Systems Requiring Only 2 Stereo Inputs (CD,
Line) and 3 Mono Inputs (Mic, Phone, PC Beep)
Block Diagram
DS100906-1
FIGURE 1. LM4540 Block Diagram
February 1999
L
1999 National Semiconductor Corporation
DS100906
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4540VH | AC ’97 Codec with National 3D Sound |
| LM4543 | AC ’97 Codec with National 3D Sound |
| LM4543VH | AC ’97 Codec with National 3D Sound |
| LM4545 | AC ’97 Codec with Stereo Headphone Amplifier and National 3D Sound |
| LM4545VH | AC ’97 Codec with Stereo Headphone Amplifier and National 3D Sound |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM4540VH | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| LM4540VHX | 功能描述:IC AUDIO CODEC '97 18BIT 48LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態(tài)范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應商設備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| LM4543 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC ’97 Codec with National 3D Sound |
| LM4543VH | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM4545 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC ’97 Codec with Stereo Headphone Amplifier and National 3D Sound |
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