Bryon, The output data that you get is 7FFFFFh. This is not a midscale value. This is a positive full scale measurement. Note that the output data is represented in twos complement notation (800000h would be negative full scale). Since you are getting 7FFFFFh, I would generally recommend that you check that the reference is smaller than you think, or that the input is accidentally disconnected. I would measure the both with a multimeter. I would also turn down the gain. Right now, you are in a gain of 128 and it doesn't take much offset to get through the full range. Start with a lower gain to make sure the measurement is correct. Joseph Wu
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