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參數(shù)資料
| 型號： | LM4550BVHX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | LM4550B AC '97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 1000/Reel |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48 |
| 文件頁數(shù)： | 31/31頁 |
| 文件大?。?/td> | 998K |
| 代理商： | LM4550BVHX/NOPB |
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Connection Diagram
20123702
Top View
Order Number LM4550BVH
See NS Package Number VBH48A
Pin Descriptions
ANALOG I/O
Name
Pin
I / O
Functional Description
PC_BEEP
12
I
Mono Input
This line level (1 Vrms nominal) mono input is mixed equally into both channels of the Stereo
Mix signal at MIX2 under the control of the PC_Beep Volume control register, 0Ah. The
PC_BEEP level can be muted or adjusted from 0 dB to -45 dB in 3 dB steps. The Stereo Mix
signal feeds both the Line Out and Headphone Out analog outputs and is also selectable at
the Record Select Mux. During Initialization or Cold Reset, (reset pin held active low),
PC_BEEP is switched directly to both channels of the Line Out stereo output, bypassing all
volume controls. This allows signals such as PC power-on self-test tones to be heard through
the PC’s audio system before the codec registers are configured.
PHONE
13
I
Mono Input
This line level (1 Vrms nominal) mono input is selectable at the Record Select Mux for
conversion by either or both channels of the stereo ADC. It can also be mixed equally into
both channels of the Stereo Mix signal at MIX2 under the control of the Phone Volume
register, 0Ch. The PHONE level can be muted or adjusted from +12 dB to -34.5 dB in 1.5 dB
steps. The Stereo Mix signal feeds both the Line Out and Headphone Out analog stereo
outputs and is also selectable at the Record Select Mux.
LM4550B
www.national.com
9
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM4550C-46 WAF | 制造商:Texas Instruments 功能描述: |
| LM4550VH | 功能描述:IC AC '97 CODEC 48-LQFP 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) |
| LM4550VH WAF | 制造商:Texas Instruments 功能描述: |
| LM4550VH/NOPB | 功能描述:IC AC '97 CODEC 48-LQFP 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) |
| LM4550VHX | 制造商:Rochester Electronics LLC 功能描述:AC '97 REV 2.1 CODEC - Bulk |
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