Hi Orencik,
The main differences between the MMA845xQ and MMA865xFC family of accelerometers are:
1. Package: 16-pin QFN (3x3x1mm) for the MMA845xQ vs. 10-pin DFN (2x2x1mm) for the MMA865xFC
2. SA0 pin: The MMA865xFC does not have the SA0 pin, so there is no chance to change its I2C slave address.
3. Resolution bits: The MMA845xQ has a selectable resolution while the MMA865xFC has a fixed resolution of 12/10-bits.
4. Mechanical/Electrical characteristics: There are minimal changes in the electrical/mechanical characteristics between these devices, you can find them in the data sheets.
If you have any other questions, please let me know.
Best regards,
Tomas
PS: If this answer helps to solve your question, please mark it as "Correct". Thank you.
