16.9.1 Conversion Formula for Bipolar Input Ranges

Input voltage = A/D value / 32768 Full-scale input voltage

Example: For bipolar input range ±5V, full-scale input voltage = 5V

For an A/D value of 17761: Input voltage = 17761 / 32768 5V = 2.710V

For a bipolar input range, 1 LSB = 1/32768 * Full-scale voltage, in this case 5V/32768 = 153uV (0.000153V).

The table below shows the relationship between A/D code and input voltage for a bipolar input range (VFS = Full scale input voltage).

A/D Code	Input Voltage Symbolic Formula	Input Voltage for +/- 5V Range
-32786	-Vfs	-5.0000V
-32767	-Vfs+1LSB	-4.9998V
...	...	...
-1	-1LSB	-0.00015V
0	0	0V
1	+1LSB	0.00015V
...	...	...
32767	Vfs-1LSB	4.9998V