Converting PPM to LSBs
To convert from PPM (parts per million) to LSBs (Least Significant Bits), please divide 1,000,000 by the number of LSBs.
Example:
For a 16-bit device with a specification of 10 ppm INL:
1,000,000/(216)=15.3 ppm/LSB1,000,000 / (2^{16}) = 15.3 \, \text{ppm/LSB}1,000,000/(216)=15.3ppm/LSB 10/15.3=0.65410 / 15.3 = 0.65410/15.3=0.654
The INL for this board is 0.654 LSBs.
Converting PPM to Voltage
To go directly from PPM to voltage, multiply the PPM value by the reference voltage.
Example:
For 10 ppm of 1 V:
10 ppm×1 V=10 μV10 \, \text{ppm} \times 1 \, \text{V} = 10 \, \mu V10ppm×1V=10μV
This represents 10 µV of Integrated Nonlinearity (INL).
Additional Information