ADG719 strange behaviour

Hi

I am using the ADG719 switch. I have two inputs with a frequency of 125kHz. I am switching between the two using a logic signal of 250kHz. But when I look at the output of the switch I just see a pulse of one of the signals then about a gap of 12ms then a pulse again. Its as though the switch is only letting through one of the signals every so often. Anyone have any idea why this would be?

Thanks

Jon

Parents
  • I have just tried simulating the part in ADsim and it doesn't seem to work in that. If anything its worse as I just get a thin pulse out. So it seems as though I am driving the select too fast. But where does it state in the datasheet how fast it can be driven? I see parameters for the select switching on/off. But nothing that gives information about the switching frequency (unless I have overlooked it).

    Thanks 

Reply
  • I have just tried simulating the part in ADsim and it doesn't seem to work in that. If anything its worse as I just get a thin pulse out. So it seems as though I am driving the select too fast. But where does it state in the datasheet how fast it can be driven? I see parameters for the select switching on/off. But nothing that gives information about the switching frequency (unless I have overlooked it).

    Thanks 

Children
No Data