Ultra low leakage analog switch?

[Astrid]

Hello,
There is a semiconductor analog switch, which should off leakage current in order pA (1-5pA) ?
I need to switch resistors for current measurements in the order of nA to pA

 

[Externet]

Better use reed relays for such low leakage figures.

 

[Astrid]

you are right, but the size and especially speed is significantly worse at relays.

 

[crutschow]

you are right, but the size and especially speed is significantly worse at relays.

All true. But I don't think you will find a semiconductor switch with such a low leakage.

How may switches do you need?

 

[Astrid]

I have 7 resistors for current range 10mA - 10nA
The problem is in the lower range
- 100pA - 10nA
- 10nA - 100nA
- 100nA- 1uA
For the pA range will use latching relay, but for higher range used semiconductor switch.