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參數(shù)資料
| 型號： | LM4550VH |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 X 1.40 MM, LQFP-48 |
| 文件頁數(shù)： | 16/25頁 |
| 文件大?。?/td> | 507K |
| 代理商： | LM4550VH |
Application Information
AC Link Serial Interface Protocol
AC Link Output Frame: SDATA_OUT (output from
controller, input to LM4550)
The audio output frame (output from AC ’97 Controller)
contains control and PCM data targeted for the LM4550
control registers and stereo DAC. The Tag slot, slot 0, con-
tains 16 bits that tell the AC Link interface circuitry on the
LM4550 the validity of the following data slots.
A new audio output frame is signaled with a low to high
transition of SYNC. SYNC is synchronous to the rising edge
of BIT_CLK. On the next rising edge of BIT_CLK, the AC ’97
Controller drives SDATA_OUT with the first bit of slot 0. The
LM4550 samples SDATA_OUT on the falling edge of BIT-
_CLK. The AC ’97 Controller will continue outputting the
SDATA_OUT stream on each successive rising edge of
BIT_CLK.
SDATA_OUT Slot 0: Tag Phase
The first bit of slot 0 is designated the "Valid Frame" bit. If this
bit is 1, it indicates that the current data frame contains at
least one slot of valid data and the LM4550 will further
sample the next four bits and slots 7 & 8 and 6 & 9 to
determine which frames do in fact have valid data. Valid slots
are signified by a 1 in their respective slot bit position.
10097204
FIGURE 3. AC 97 Bidirectional Audio Frame
10097206
FIGURE 4. AC Link Audio Output Frame
10097205
FIGURE 5. Start of Audio Output Frame
L
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| LM4550 | AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
| LM4809LD | Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode |
| LM4809 | Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode |
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(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) |
| LM4550VHX | 制造商:Rochester Electronics LLC 功能描述:AC '97 REV 2.1 CODEC - Bulk |
| LM4550VHX/NOPB | 制造商:Texas Instruments 功能描述:Audio Codec 2ADC / 2DAC 18-Bit 48-Pin LQFP T/R |
| LM4558 | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:DUAL OPERATIONAL AMPLIFIERS |
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