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參數(shù)資料
| 型號： | 0W888-002-XTP |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | BelaSigna 250 - 16 bit Audio Processor, Full Stereo 2-in, 2-out; Package: LFBGA 64, 7x7; No of Pins: 64; Container: Tape and Reel; Qty per Container: 1500 |
| 中文描述： | 0-BIT, 50 MHz, MIXED DSP, PBGA64 |
| 封裝： | 7 X 7 MM, GREEN, LFBGA-64 |
| 文件頁數(shù)： | 11/34頁 |
| 文件大?。?/td> | 935K |
| 代理商： | 0W888-002-XTP |
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Rev. 7 | Page 19 of 34 | www.onsemi.com
BelaSigna 250
Figure 10: Input Stage
3.5.2. Output Stage
The analog audio output and the digital output are composed of two individual channels. The first part of the output stage interpolates
the signal for highly oversampled D/A conversion and automatically configures itself for the desired over-sampling rate. Here, the signal
is routed to the
D/A converter and the direct digital outputs.
The D/A converter translates the signal into a high-fidelity analog signal and passes it into a third order analog reconstruction filter to
smooth out the effects of sampling. The reconstruction filter has a cut-off frequency configurable at 10 or 20kHz.
From the reconstruction filter, the signal passes through the programmable output attenuator, which can adjust the signal for various
line level outputs or mute the signal altogether. The attenuator can be configured to a value in the interval 12 to 30dB (3dB steps) or it
can be bypassed.
The direct digital outputs provide two H-bridges driven by pulse-density modulated outputs that can be used to directly drive an output
transducer without the need for a separate power amplifier. The output driver has a dedicated power-supply pin, which allows for
separation (through RC-filtering) between the supply for the analog blocks on the chip and the supply for the output driver.
The output stage is shown in Figure 11.
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