I've just modified the INA103 model to get access to the Gain Drive and Sense pins, I thought I'd share it in case it's of interest. I've also made an LTSpice symbol to go with it and I've included a little test circuit in the zip too. As usual place the model in lib\sub, the symbol in lib\sym and you're good to go.
I didn't bother with pin labels to keep the symbol clean and reasonably sized; from left to right:
- between the inputs are the Gain Sense pins where you connect the gain setting resistor
- the ones after the supply pins are Gain Drive 1 (top) and Gain Drive 2 (bottom)
- next to the output are Sense (top) and Ref (bottom)
I did this because I was toying with the idea of making a mic preamp with balanced outputs, which you can do easily if you duplicate the summing stage with an external opamp and feed it reversed from the Gain Drive pins (GD1 to non-inverting input, GD2 to inverting). As for Sense, there are a few circuits in the datasheet where it isn't directly connected to the output, so while I was at it I thought I'd include it as well. I hope someone finds it useful.
I didn't bother with pin labels to keep the symbol clean and reasonably sized; from left to right:
- between the inputs are the Gain Sense pins where you connect the gain setting resistor
- the ones after the supply pins are Gain Drive 1 (top) and Gain Drive 2 (bottom)
- next to the output are Sense (top) and Ref (bottom)
I did this because I was toying with the idea of making a mic preamp with balanced outputs, which you can do easily if you duplicate the summing stage with an external opamp and feed it reversed from the Gain Drive pins (GD1 to non-inverting input, GD2 to inverting). As for Sense, there are a few circuits in the datasheet where it isn't directly connected to the output, so while I was at it I thought I'd include it as well. I hope someone finds it useful.