# Temperature sensor slope explanation

I am looking at an accelerometer(data sheet is BMA280 ) which has capabilities of measuring temperature from -40 to 85 degrees celsius. It also specifies a Temperature Sensor Slope of 0.5K/LSB, where it fills up an 8-bit register. It's centered on 23 degress celsius when the register reads 0.

Obviously this is a signed number. one question I have is how does the slope play into this. If it really is 0.5K/LSB then it means per single bit I have increments of -272.65 celsius which doesn't make sense to me. What do they mean with the 0.5K/LSB slope?

If I take 125 (the overall temperature range) and divide that by 256 (8 bits) I get 0.488 which is about 0.5/LSB. What I don't understand is the 'K'. why is it a K and not a C.

This is in all the documentation and they are consistent except for a few locations, does K mean Celsius in some countries? This also spans into other datasheets as well. So I am beginning to suspect I don't know something I should.

• The expression ".5K/LSB" is a short hand way of saying 0.5 Kevins per LSB. – Dwayne Reid Feb 6 '15 at 3:37