MPXM2102AS datasheet(274/670 Pages) MOTOROLA

274 / 670 page

MPX5999D

3–128

Motorola Sensor Device Data

www.motorola.com/semiconductors

ON–CHIP TEMPERATURE COMPENSATION, CALIBRATION AND SIGNAL CONDITIONING

Figure 2 shows the sensor output signal relative to pres-

sure input. Typical, minimum, and maximum output curves

are shown for operation over a temperature range of 0

° to

°C using the decoupling circuit shown in Figure 4. The

output will saturate outside of the specified pressure range.

The performance over temperature is achieved by integrat-

ing the shear–stress strain gauge, temperature compensa-

tion, calibration and signal conditioning circuitry onto a single

monolithic chip.

Figure 3 illustrates the differential or gauge configuration in the

basic chip carrier (Case 867). A fluoro silicone gel isolates the

die surface and wire bonds from harsh environments, while al-

lowing the pressure signal to be transmitted to the silicon dia-

phragm.

The MPX5999D pressure sensor operating characteristics,

and 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 regarding media

compatibility in your application.

Figure 4 shows the recommended decoupling circuit for

interfacing the output of the integrated sensor to the A/D in-

put of a microprocessor or microcontroller. Proper decoup-

ling of the power supply is recommended.

MAX

Figure 2. Output versus Pressure Differential

DIFFERENTIAL PRESSURE (kPa)

5.0

4.0

3.0

2.0

1100

700

300

900

500

4.5

3.5

2.5

1.5

100

TRANSFER FUNCTION:

Vout = VS*(0.000901*P+0.04) ± ERROR

VS = 5.0 Vdc

TEMP = 0 to 85

°C

1.0

0.5

1000

600

200

800

400

MIN

TYPICAL

SILICONE

DIE COAT

LEAD

FRAME

STAINLESS STEEL

METAL COVER

RTV DIE

BOND

DIE

WIRE BOND

Figure 3. Cross–Sectional Diagram

(Not to Scale)

THERMOPLASTIC CASE

Figure 4. Recommended power supply decoupling

and output filtering.

For additional output filtering, please refer to

Application Note AN1646.

1.0

IPS

470 pF

OUTPUT

+5 V

0.01

GND

Vout

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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