low current PIR

r app not e recommends 47K load resistor on source pin, which make my curre nt goal very difficult. I've come across few designs where people have used over 1M on source pin to achieve this amount current. Does any one know if is okay use over 1M value? what could be side affect?

Can you post a link to the app note? Pyro's only respond to changes in light... so knowing very little of the details I might worry that the larger R would reduce the maximum frequency and thus the signal level.

George H.

not e recommends 47K load resistor on source pin, which make my current goal very difficult. I've come across few designs where people have used over 1M on source pin to achieve this amount current. Does any one know if is okay use over

muRata IRA-E712 at least works perfect with a 2 uA. We're using both S and D resistors in the circuit with gate tied to ground. I don't remember the exact numbers, but I think our R is a lot less than 1M, as the current is controlled by the biasing.

-- Mikko OH2HVJ

mer app not e recommends 47K load resistor on source pin, which make my cur rent goal very difficult. I've come across few designs where people have us ed over 1M on source pin to achieve this amount current. Does any one know if is okay use over 1M value? what could be side affect?