I just got some prototypes built using the MPU-9250. I did not read the assembly application note (it really should be PART OF THE DATASHEET) and so I had the board house use leaded solder and whatever their default pick-and-place settings were. I can communicate with the MPU-9250 via I2C just fine, and I get seemingly valid readings from the 3-axis magnetometer, but I am getting bad data from the accelerometer and gyroscope. They both show nearly constant values in all three dimensions no matter the orientation and/or rotation of the part.
Did I just get a bad part? Should I replace it using lead free solder? Is there some calibration procedure I need to perform? Am I going to have manufacturing yield problems with these devices?