Hi.
I'm working on the device, which should get detail and precise current measurements for the 2.4GHz tranceiver -> 300 microseconds on-air time.
The total measurement current is less 50 mA, and there is a low currents like 500na-1uA(and up), so to see the process in time i should consider 18-bit 200kSps to 1Msps ADC and opamp analog part between shunt and the ADC.
Which opamp i should use for my solution and any schematic advices?
Thanks.