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參數(shù)資料
| 型號： | STA304 |
| 廠商： | 意法半導體 |
| 英文描述： | DIGITAL AUDIO PROCESSOR WITH MULTICHANNEL DDX⑩ |
| 中文描述： | 數(shù)字音頻處理器多通道的DDX⑩ |
| 文件頁數(shù)： | 10/30頁 |
| 文件大?。?/td> | 335K |
| 代理商： | STA304 |
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STA304
10/30
5.0 DDX OUTPUT SWITCHING
The 5 DDX output (L,R,SL,SR,LFE) are ternary modulated PWM, designed to drive directly STA50X power
bridge ICs or any custom discrete power. The PWM output frame is delayed from channel to channel in order
to reduce the crosstalk at the stereo STA50X device at low audio dynamics. The PWM order in the STA304 is:
– L
– LS
– R
– RS
with 32 ticks (of master clock) or ~640ns between the beginning of each PWM frame (frame period is ~2.6usec).
The LFE PWM signal is independently generated (synchronous with LS PWM output), because it is intended to
be used alone on a mono-configured STA50x IC (no crosstalk issues).
In this way the low-modulated level PWM signal of different channels switches when the others are at zero level,
so when the output power is in dump state (both terminals of the speaker loads are connected to ground), caus-
ing no noise cross-injection.
Best performances are obtained when only front channels (L/R) or rear channels (SL/SR) are fed to a single
STA50X device, because the PWM frames of L an R have the maximum distance of ~1.3usec (same for SL and
SR).
Of course crosstalk is anyway removed with a good power supply design/layout for STA50x ICs (low impedance
stage and low inductance loop between powerVDD and GND). See application notes for more details
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相關代理商/技術參數(shù) |
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|---|---|
| STA304A | 功能描述:音頻 DSP Digital Audio Procsr RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| STA305 | 制造商:SANKEN 制造商全稱:Sanken electric 功能描述:PNP Darlington 3-phase motor drive |
| STA305A | 制造商:SANKEN 制造商全稱:Sanken electric 功能描述:PNP Darlington 3-phase motor drive |
| STA306 | 功能描述:多媒體雜項 AUDIO SYSTEMS RoHS:否 制造商:Texas Instruments 類型: 通道數(shù)量: 轉換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube |
| STA30613TR | 功能描述:多媒體雜項 AUDIO SYSTEMS RoHS:否 制造商:Texas Instruments 類型: 通道數(shù)量: 轉換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube |
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