Cirrus-logic CDB5490U Manual do Utilizador descarregar pdf (Página 7)

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).

GND

LINE

CS5490

CDB5490U

NEUTRAL

LINE

J11

0.027UF

422K

R12

422K

R14

422K

R15

422K

J45

VIN-

VIN+

Figure 3. Voltage Channel — High-voltage Input

4 422k1k+

----------------------------------------

1689

-------------

300Vrms

250mVp

-----------------------

1689=

1 2 3 4 5 6 7 8 9 10 11 12 ... 45 46

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Cirrus-logic CDB5490U Manual do Utilizador Página 7