What is the 'sense' pin on an op-amp for and how is it used?
What are some circuit examples that that use the sense pin?
Here is an example of an op-amp with a sense pin: http://www.ti.com/lit/ds/symlink/ina137.pdf
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The sense pin in a voltage regulator is connected to the point-of-load so that a high output current and wiring resistance do not compromise the voltage regulation. The INA137 sense pin serves a similar purpose, allowing the amplifier output to be sensed, for feedback, at an output node which might not be directly wired to the amplifier 'output' pin. see figure 5
The matching of the internal resistors is better than easily achievable with discrete components, so a variety of precision circuits is possible with this kind of packaged op-amp/resistor array. Someone chose 'sense' as a descriptive label for the low-R inverting input connection, possibly because it can replicate the function of voltage sense wiring.