I've just started experimenting with the MPL115A2 Digital Barometer.
Maybe I’m having a bad day – but I can’t understand how to convert the Coefficient integers / binary values into numbers.
The data sheet doesn’t seem to make sense. For example a0 is defined as
a0 Signed, Integer Bits = 12, Fractional Bits = 3 : Coeff a0 = S I11 I10 I9 I8 I7 I6 I5 I4 I3 I2 I1 I0 . F2 F1 F0
Later the data sheet uses the example a0 = 0x3ECE = 2009.75
Maskign out - bits I11 to I0 gives 2009 - but the last 3 bits (the fractional bits) are 0x06 - I can't see how that taken to be 0.75?
Are there any examples of how to take these Coefficients in binary/hex form and convert them into actual numbers?