SPICE model of ADA4433-1 seems to be wrong. I imported the model into LTSpice17 and also into ADISimp. Auto-generated symbol in both. Then applied a 1Vpp input with DC bias of 500mV at IN+ and IN- (of course in opposite phase). Powered the part with 3.3V. ENA at 3.3V too. To my surprise, outputs (both of them) in both these simulators show NEGATIVE 3.65V DC With very little sinusoid on it. Where on earth does the negative output come into picture? Has anybody ever simulated this part in any simulator with the AD supplied SPICE model?