Other Parts Discussed in Thread: AMC1336,
When the AMC1336QDWVRQ1 is used for voltage sampling, the output should only flip after the rising edge (clock 20MHz), that is, the narrowest output pulse should be 50ns, but we found the following abnormal flip during testing, the value read by the MCU will be varied from 0V to a few hundred volts of negative voltage, please help to analyze, thank you~
The dark blue channel 1 is the clock signal, and the sky blue channel 2 is the AMC1336 output signal
This fault occurs occasionally at low temperatures of -20 degrees. When we change the resistor marked in green from 46.4ohm to 11ohm, we can reoccur this fault at room temp.
When we change below 22uF marked in red to 47uF and keep the resistor marked in green at 46.4ohm, the fault will disappear.
Thanks & Best Regards,