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TMP006 Sensor Voltage Register issue.

Other Parts Discussed in Thread: TMP006

Hi,

I'm using TMP006 to measure the skin temperature; and currently I can read out the value of voltage register (register 0) and temperature register (register 1). But it's seems some issue of the voltage register. Below data is captured when I breathed upon TMP006, 

3044 -166
3044 -165
3044 -161
3044 -163
3044 -166
3316 -4078
3636 634
3732 68
3780 -510
3720 878
3740 -939
3784 463
3728 705
3668 509
3624 400
3592 315
3560 298

the first column is temperature register value and the second column is voltage register value.

But why there is a sudden drop (-4078) of the voltage register value when I breathed upon TMP006? I have tried many times and this can occurred each time. Can anybody give me some help? Thanks in advance!