I need an adjustable constant current source than can be set to anywhere between 0.5 microAmps and 2 Amps. An output compliance voltage of say 10 volts should be sufficient. The LT1167 data sheet has a current source with 2 pA resolution. An earlier version of its data sheet showed a plot spanning 8 decades up to 10 mA. My dynamic range is 4 E+6 but needs to go to higher currents. I'm concerned about offsets, etc restricting the lower range if I tried to construct a similar instrumentation amplifer from 3 individual op amps using one capable of high currents such as the OPA548 or LM675
- posted
14 years ago