20PC Family Pressure Sensors
Ratiometricity for 20PC Output
Technical Note
Sensing and Control
BACKGROUND
The 20PC series are considered ratiometric
meaning the output signal is proportional to the
supply voltage.
PURPOSE
Specifications in the product sheet such as Span,
Sensitivity, etc. are defined when using typical
excitation voltage of 10 Vdc. Therefore, an output
curve can be drawn as shown in Figure 1.
For any specific listing, the slope of the line is
determined by excitation voltage. For example, for a
5 psi unit, the full scale output will be 50 mV at 10
Vdc excitation voltage and 80 mV at 16 Vdc
excitation voltage.
Full
Scale
0 PSI
PRESSURE
10
Voltage Excitation
ySensitivit
VoltageOutput Scale Full
×=
OUTPUT
VOLTAGE
Figure 1 Output Curve
Ratiometricity for 20PC Output
Technical Note
Sensing and C o ntrol
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