8.4 Correlation between A/D Code and Input Voltage
The two tables below illustrate the correlation between the A/D code and the corresponding input voltage. Use these tables as guides to help think about how to convert between the voltage domain and the A/D code domain.
Bipolar Input Ranges
A/D Code | Input voltage formula | Input voltage ( +5V range) |
-32768 | -Vfs | -5.0000V |
-32767 | -Vfs+1LSB | -4.9998V |
-1 | -1LSB | -0.153mV |
0 | 0V | 0.0000V |
1 | +1LSB | 0.153mV |
32767 | Vfs-1LSB | 4.9998V |
Unipolar Input Ranges
A/D Code | Input voltage formula | Input voltage ( +5V range) |
-32768 | -Vfs | 0.0000V |
-32767 | 1 LSB (VFS / 65536) | 0.153mV |
-1 | VFS / 2 - 1 LSB | 4.9998V |
0 | VFS / 2 | 5.0000V |
1 | VFS / 2 + 1 LSB | 5.00015V |
32767 | Vfs-1LSB | 9.9998V |
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