Replacement of Photorelay

Dear ADIer

Is there any solution to succesively replace Photorelay (TPL3231 or TPL3240) from Toshiba?

My target application is focused on ATE...

Thanks

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  • 0
    •  Analog Employees 
    on Jan 26, 2017 6:15 PM

    Hi Avraka,

    The requirements are different to get in a single switch.  The ADG8xx series are the lowest Ron switches we have and would satisfy the 0.5ohm requirement but if the input voltage needs to be 10V then this series is not suitable.  If 5V can be used then you should consider the ADG801.  But it would not have low enough capacitance, its capacitance is 420pF.  Remember for CMOS switches, the lower the Ron the higher the Capacitance, they go in opposite directions.  So it is very hard to get say a 0.5ohm Ron switch will low Capacitance like 10pF.  A low capacitance switch like ADG611 (5pF) would be good but its Ron is 85ohms typical and current rated to 10mA only. 

    Are there any trade off's possible in these specs?  How about the ADG741 as a compromise option.  2ohms Ron, 38pF on capacitance, 5V ok, 0.01nA typical leakage, 30mA max current rating. 

    Regards,

    Eric.

Reply
  • 0
    •  Analog Employees 
    on Jan 26, 2017 6:15 PM

    Hi Avraka,

    The requirements are different to get in a single switch.  The ADG8xx series are the lowest Ron switches we have and would satisfy the 0.5ohm requirement but if the input voltage needs to be 10V then this series is not suitable.  If 5V can be used then you should consider the ADG801.  But it would not have low enough capacitance, its capacitance is 420pF.  Remember for CMOS switches, the lower the Ron the higher the Capacitance, they go in opposite directions.  So it is very hard to get say a 0.5ohm Ron switch will low Capacitance like 10pF.  A low capacitance switch like ADG611 (5pF) would be good but its Ron is 85ohms typical and current rated to 10mA only. 

    Are there any trade off's possible in these specs?  How about the ADG741 as a compromise option.  2ohms Ron, 38pF on capacitance, 5V ok, 0.01nA typical leakage, 30mA max current rating. 

    Regards,

    Eric.

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