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ADG3245 leakage

Question asked by Nirb on Oct 13, 2016
Latest reply on Oct 17, 2016 by mayp

Hi,

 

I am using STM32F401RE microprocessor to implement SPI.

CLK rate is 1.5MHz.

 

I try to use ADG3247/ADG3245 for translate 3.3V to 1.8V.

 

It seems that there is a leakage between the bits. If I use the CLK input on A0 and nothing on A1 input, at the output of B1 I will see a leakage of the CLK about 0.4V high.

this leakage influence the signals of MOSI/MISO etc.

 

I don't know why this leakage is exist and how to eliminate it.

do you have any idea?

 

In addition is there any bidirectional 3.3V=>1.8V device to use???

 

Best regards,

Nir

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