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Analog Switch with Greatest OFF isolation

Jack Loop
Guru 17870 points
Other Parts Discussed in Thread: TS12A44513

Hi,

I noticed that TI sells analog switches. I am looking for any analog switch that have the highest possible off isolation value. Which analog switch part numbers do you suggest?

  • 0
    TI__Mastermind 45420 points
    Jack,

    Yes, TI sells >300 analog switches but will need some more information to narrow down our search .

    1) What type of signals are you trying to isolate? Voltage, bandwidth, current?

    2) How many signals are you wanting to isolate?

    3) When you are asking for isolation are you looking at it from an AC isolation or DC isolation?

    Thank you,
    Adam
  • 0 in reply to Adam Torma
    Guru 17870 points

    1) I am trying to prevent pins of a chip from making a connection when the switch is off. These pins are very sensitive. I did notice though that they don't make a connection when I apply a 1M ohm resistor across them. So I am looking for a switch that has an "off" isolation similar to this.
    2) 3
    3) DC

  • 0 in reply to Jack Loop
    TI__Mastermind 45420 points

    Jack,

    If you are looking at isolating in a DC sense than you can look at the off state leakage current.  Using the TI.com switch selection tool I have found TS12A44513 that specifies low off-state leakage current.

    Thank you,

    Adam