Cirrus-logic CDB5490U Manual de usuario Pagina 7

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CDB5490U
DS923DB5 7
The default attenuation network provides the following attenuation:
With the CS5490 input range of 250mVp at maximum AC line input of:
is acceptable. It is recommended to apply a 10% margin for the AC line input (270Vrms).
The CDB5490U evaluation board provides input shorting options for calibration and noise performance
measurements. With a jumper on J6 and J11 in the GND position, the inputs are connected to analog
ground (GND).
Figure 3. Voltage Channel — High-voltage Input
1k
4 422k1k+
----------------------------------------
1
1689
-------------
=
300Vrms
250mVp
2
-----------------------
1689=
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