MPX2050

Sensors

4

Freescale Semiconductor

Pressure

Maximum Ratings

LINEARITY

Linearity refers to how well a transducer's output follows

pressure range. There are two basic methods for calculating

nonlinearity: (1) end point straight line fit (see Figure 2) or (2)

a least squares best line fit. While a least squares fit gives the

“best case” linearity error (lower numerical value), the

calculations required are burdensome.

Conversely, an end point fit will give the “worst case” error

(often more desirable in error budget calculations) and the

calculations are more straightforward for the user. Motorola's

specified pressure sensor linearities are based on the end

point straight line method measured at the midrange

pressure.

Figure 2. Linearity Specification Comparison

1. Exposure beyond the specified limits may cause permanent damage or degradation to the device.

Rating

Symbol

Value

Unit

Maximum Pressure (P1 > P2)

200

kPa

Storage Temperature

-40 to +125

°C

Operating Temperature

-40 to +125

°C

Pressure (% Fullscale)

0

50

100

End Point

Straight Line Fit

Exaggerated

Performance

Curve

Least Squares Fit

Least

Square

Deviation

Straight Line

Deviation

Offset