Fellow humans:
I need a voltage reference with Rs about 1 ohms or less. This is to drive a simple Instrumentation Amplifier using a general purpose FET op-amp. I need to use a simple IA because their will be four of them and space and cost are factors. A simple IA is affected by the Rs in the two legs. So, to reduce gain errors I need a reference with low Rs to match the Rs of the leg I am measuring.
My question is, can I simply use an LT1004-1.2 straight into my FET IA + input through its 16.5k resistor, (I need gain in my IA their is a FB r as well) or should I buffer it with a unity gain op-amp THEN into my IA ? This is all at DC, AC behavior is not really important. Thank you for your help.
I need a voltage reference with Rs about 1 ohms or less. This is to drive a simple Instrumentation Amplifier using a general purpose FET op-amp. I need to use a simple IA because their will be four of them and space and cost are factors. A simple IA is affected by the Rs in the two legs. So, to reduce gain errors I need a reference with low Rs to match the Rs of the leg I am measuring.
My question is, can I simply use an LT1004-1.2 straight into my FET IA + input through its 16.5k resistor, (I need gain in my IA their is a FB r as well) or should I buffer it with a unity gain op-amp THEN into my IA ? This is all at DC, AC behavior is not really important. Thank you for your help.