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AD8676 Pspice Noise model

Hello everyone,

For a new project I want to use AD8676 as low noise amplifier. The problem is that trying to simulate the circuit with pspice i found an unexpected behavoiur for the spice model. The problem is that even used as a buffer with 0 feedback resistor the AD8676 shows an output noise of more then 20 nv/rtHz @ 1kHz that is a little bit less than 10 times the datasheet declared voltage noise density @ 1KHz.

Is it a pspice model issue or is there something that i have not considered?

Best Regards

Roberto

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