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WM8510GEDS/V bảng dữ liệu(PDF) 19 Page - Wolfson Microelectronics plc

tên linh kiện WM8510GEDS/V
Giải thích chi tiết về linh kiện  MONO CODEC WITH SPEAKER DRIVER
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Product Preview
WM8510
w
PP Rev 1.2 December 2004
19
AGND
MBVSEL=0
MICBIAS
= 1.8 x VMID
= 0.9 X AVDD
VMID
internal
resistor
internal
resistor
MB
MBVSEL=1
MICBIAS
= 1.5 x VMID
= 0.75 X AVDD
Figure 9 Microphone Bias Schematic
ANALOGUE TO DIGITAL CONVERTER (ADC)
The WM8510 uses a multi-bit, oversampled sigma-delta ADC channel. The use of multi-bit feedback
and high oversampling rates reduces the effects of jitter and high frequency noise. The ADC Full
Scale input level is proportional to AVDD. With a 3.3V supply voltage, the full scale level is 1.0Vrms.
Any voltage greater than full scale may overload the ADC and cause distortion.
ADC DIGITAL FILTERS
The ADC filters perform true 24 bit signal processing to convert the raw multi-bit oversampled data
from the ADC to the correct sampling frequency to be output on the digital audio interface. The digital
filter path is illustrated in Figure 10.
Figure 10 ADC Digital Filter Path



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