MPXT2010 SERIES

3

Motorola Sensor Device Data

ON–CHIP TEMPERATURE COMPENSATION and CALIBRATION

Figure 2 shows the output characteristics of the MPXT2010

series at 25

°C. The output is directly proportional to the dif-

ferential pressure and is essentially a straight line.

The effects of temperature on full scale span and offset are

small and are shown under Operating Characteristics.

Figure 3 illustrates the differential/gauge die in the basic

chip carrier (Case 473). A silicone gel isolates the die surface

and wire bonds from the environment, while allowing the

pressure signal to be transmitted to the silicon diaphragm.

Figure 2. Output versus Pressure Differential

Figure 3. Cross–Sectional Diagram (not to scale)

MIN

TYP

OFFSET

(TYP)

30

20

15

10

5

25

0

–5

kPa

PSI

2.5

0.362

5

0.725

7.5

1.09

10

1.45

SPAN

RANGE

(TYP)

VS = 10 Vdc

TA = 25°C

P1 > P2

FLUORO SILICONE

DIE COAT

WIRE BONDS

LEAD FRAME

DIE

STAINLESS STEEL

METAL COVER

EPOXY CASE

P1

The MPXT2010 series pressure sensor operating charac-

teristics, internal reliability and qualification tests are based

on use of dry air as the pressure media. Media other than dry

air may have adverse effects on sensor performance and

long term reliability. Contact the factory for information re-

garding media compatibility in your application.

LINEARITY

Linearity refers to how well a transducer’s output follows

the equation: Vout = Voff + (sensitivity x P) over the operating

pressure range. There are two basic methods for calculating

nonlinearity: (1) end–point straight line fit, or (2) a least

squares best line fit (see Figure 4).

When calculating linearity, Motorola uses the end–point

straight line fit. This method measures the two end and the

mid range pressure points and compares to ideal. This typi-

cally represents the “worst case” error which is often more

desirable for the customers when calculating an error budget

in their designs.

Figure 4. Linearity Specification Comparison

LEAST

SQUARE

DEVIATION

PRESSURE (% FULLSCALE)

0

50

100

END POINT

STRAIGHT LINE FIT

EXAGGERATED

PERFORMANCE

CURVE

LEAST SQUARES FIT

STRAIGHT LINE

DEVIATION

OFFSET

ORDERING INFORMATION

The MPXT2010G7U pressure sensor is available to be shipped in Rails.

Packing Options

Port Options

Leadform

Case No.

MPXS Series Order No.

Marking

Rails

Element

84 degree

473A–01

MPXT2010G7U

MPXT2010G