Omega Vehicle Security DAQ-16 user manual Voltage Binary ’s Complement

Voltage	Binary	Binary	2’s Complement	2’s Complement
	unipolar	bipolar	unipolar	bipolar
-Vmax	n/a	0	n/a	-32,768
-Vmax/2	n/a	+16,384	n/a	-16,384
0	0	+32,768	-32,768	0
+Vmax/2	+32,768	+49,152	0	+16,384
+Vmax	+65,535	+65,535	+32,767	+32,767

Table 2-2. A/D Conversion Format Examples

In order to calculate the actual input voltage from the digital "code" provided by the DAQ-16, the user must know the configuration used to acquire the data. Given this information, the input voltage can be calculated using the equations below:

Unipolar, binary

input =

CODE 65, 536

* Vmax

Bipolar, binary

input =

Unipolar, 2’s complement

input =

Bipolar, 2’s complement

input =

CODE 65, 536

CODE 65, 536

CODE 65, 536

- 12 * 2 * Vmax + 12 * Vmax

*2 * Vmax

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