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Category: Hardware
Product Number: LT1970a with nA current limit set

I'm using the LT1970a in current limit mode (sink and source).
I replaced the shunt current monitor resistor (RCS) of the evaluation board of the LT1970a : DC453B-A with a set (20, 200, 2k, 20k) in order to work at different current range.

Which is the best strategy to move to nA range?

It seems that +/- 4mV is the lowest limit SENSE+/- input stage:

I was thinking to add INA amplifier between shunt resistor RCS and SENSE+/- pin.
Thanks in advance for any comments!