PCM9211
SBAS495 –JUNE 2010
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APPLICATION EXAMPLE FOR ANALOG INPUT
Figure 45 shows an example of VCOM biased buffering for 2-VRMS input with overvoltage protection.
R2
C2
+V
+5V
C1
R1
Input
R3
Output
- V
VCOM
C3
0V
Example of C and R values with gain (G) and corner frequency (fC):
R1 = 20 kΩ
R2 = 10 kΩ
R3 = 1 kΩ
C1 = 10 mF
C2 = 330 pF
C3 = 0.1 mF
G = 0.5
fC = 48 kHz
Figure 45. VCOM Biased Buffering Example
60
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