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參數(shù)資料
| 型號(hào)： | LM4931 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers |
| 中文描述： | 與單聲道音頻子系統(tǒng)高效揚(yáng)聲器和立體聲耳機(jī)放大器 |
| 文件頁(yè)數(shù)： | 22/47頁(yè) |
| 文件大?。?/td> | 1640K |
| 代理商： | LM4931 |
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Clock Divider Configuration Registers
(Continued)
The voice codec operates at 128*fs, so it requires a 1.024MHz clock to operate on 8kHz data. The Audio DAC also operates at
128*fs, i.e. 6.144MHz for 48kHz data, 5.6448MHz for 44.1kHz data etc. It is expected that the PLL is used to drive the audio
system unless a 12.288MHz or 24.576MHz (AC’97) master clock is supplied and the sample rate is always 48kHz, in which case
the PLL can be bypassed to reduce power.
The voice codec is always driven from the divided down clock from the PLL output or a divided down version of the master clock.
When using the voice codec for 8kHz operation, program the PLL as you would for 48kHz operation and use Q to divide by
(2*FSaudio/FSvoice).
The PLL can also use the I2S clock input as a source. In this case, the audio DAC uses the clock from the output of the PLL and
the voice codec either uses a divided by 6 clock or a divided version of the MCLK pin.
MCLK must be less than or equal to 50MHz if the input divider is to be used, otherwise MCLK can be any frequency up to 25MHz.
The comparison frequency after the M divider should be less than 5MHz
20100964
FIGURE 5.
L
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LM4931_06 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Audio Subsystem with Mono High Efficiency Loudsperker and Stereo Headphone Amplifiers |
| LM4931ITL/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4931ITLBD | 功能描述:BOARD EVALUATION LM4931ITL RoHS:否 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| LM49321 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression |
| LM49321RL | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression |
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