Other Parts Discussed in Thread: OPA858
Hi Team, I'm experiencing Bias issues when using Models from the OPA855 Unencrypted PSpice Model Package (Rev. D).
As shown in Fig. 1, it is an inverting amplifier with a gain of -10 V/V and an input voltage of 100mV, the expected output voltage should be -1V, but the output voltage of the Pspice Model is 5.977V and there is no virtual short, I'm not sure if it is a problem with the model or the circuit.
Therefore, I use OPA858 instead of OPA855 to test the circuit, as shown in Fig. 2, which is also an inverting amplifier, with a gain of -10 V/V, an input voltage of 100mV, and an expected output voltage of -1V, but the actual output voltage is -0.998V, and there is a virtual short circuit on the negative input of the OPA.
Can you give me some comments or ideas? Thank you!
Figure1. OPA855 Inverting Amplfier
Figure 2. OPA858 Inverting Amplfier
