This module can be used as a voltage amplifier on samples >1Gohm
Input currents are very low but drift and voltage noise are higher then M2/M2m. NOTE: the lemo pins 1 and 3 provide a guarding OUTPUT for the voltage on pin 2 and 4.
It can still be used with a normal Lemo-cable (using only pin 2 and 4) but with a special cable AND measurement setup this allows to virtually cancel leakage currents.
specs:
Input noise voltage: 30nV/sqrtHz
Input noise current: 0.1fA/sqrtHz
Input bias current : <5fA
Temp drift : 10uV/c
Bandwidth : 800kHz..70kHz (gain=1..100)