measuring current

[kripzzz]

i need an IC to sense current of range 0-8 micro ampere of resolution 9 nano ampere.. it is then required to measure that current..

[Thomas W]

Is there sense resistor in the circuit you want to measure on? Or how are you going to interface to the circuit under test?

[kripzzz]

[quote="Thomas W"]Is there sense resistor in the circuit you want to measure on? Or how are you going to interface to the circuit under test?[/quote]
i'm going interface using an I2C.. actually i'm not sure if to use a current sensor or anything else..

[Thomas W]

I'm thinking an opamp with high input impedance, with the output connected to an A/D converter with I2C interface.
What kind of circuit or component do you want to measure the current in?