I am using an AD8138 in a preamplifier design. The circuit is unity gain with 1100 ohms input and feedback resistors for both positive and negative inputs. Supplies are +/-5V. With +input grounded and VCOM grounded I get 40mA of current flowing OUT of the negative supply terminal. Is there a problem with the spice model. I downloaded the model from ADI and the header indicates this is REV E created by ADI on 11/2002. Any ideas?