I've got a simple circuit for the noise simulation of the LT1723 with ltspice. The Simulation work's well an the results for the voltage noise are the same specified in the datasheet. Now my question is: I've added a resistor of 4k7 to ground at the Input of the opamp but the results for the noise Simulation are the same. Does ltspice simulate the current noise of the opamp and the resistor? Or what did I wrong?