MPX2202DP datasheet(450/670 Pages) MOTOROLA

450 / 670 page

AN1516

3–304

Motorola Sensor Device Data

www.motorola.com/semiconductors

RG = 500

Ω

R1, R2 = 100 k

R5, R7 = 100 k

R3, R4 . . . R6 = 10 k

R9 . . . R11 = 10 k

R8 = 100

Roff = 25 k var

a1 . . . a4 = 1/4 MC33179

D1 = MLED76

MC7808ac = REGL 8 VDC

TR = TRANSFORMER 220:12 V

C1 = 40

µF 40 V

Offset Adjust

Reference ADJ

Roff

R10

R11

6 –

–

Gain ADJ

–

TP1

TP2

+ 12

– 13

TP3

Motor

220 VAC

+8 VDC

MPXM2010GS

MC78L08

MOC2A60

Figure 4. Electrical Circuit

Liquid

Level

Pressure

Sensing

(TP1)

Trigger

Voltage

(TP3)

Pump

Voltage (AC220V)

Max

Min

7 V

4.3 V

0.4 V Ref (TP2)

3.7 V

Sensing for minimum level (pumping into the tank)

The sensing probe is tied to the positive pressure port of the sensor. The pump is turned on to fill the tank when the minimum level is reached.

Figure 5. Functional Diagram

10 mm

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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