鈥?/div>
Pressure Switching
Figure 1 shows a block diagram of the internal circuitry on the stand鈥揳lone pressure
sensor chip.
V
S
3
THIN FILM
TEMPERATURE
COMPENSATION
AND
CALIBRATION
CIRCUITRY
1
GND
MPXM2010
SERIES
Motorola Preferred Device
0 to 10 kPa (0 to 1.45 psi)
25 mV FULL SCALE SPAN
(TYPICAL)
MPAK PACKAGE
SCALE 1:1
MPXM2010D/DT1
CASE 1320
SCALE 1:1
2
4
SENSING
ELEMENT
V
out+
V
out-
MPXM2010GS/GST1
CASE 1320A
PIN NUMBER
1
2
Gnd
+V
out
3
4
V
S
鈥揤
out
Figure 1. Temperature Compensated Pressure Sensor Schematic
VOLTAGE OUTPUT versus APPLIED DIFFERENTIAL PRESSURE
The differential voltage output of the sensor is directly proportional to the differential
pressure applied.
The output voltage of the differential or gauge sensor increases with increasing
pressure applied to the pressure side (P1) relative to the vacuum side (P2). Similarly,
output voltage increases as increasing vacuum is applied to the vacuum side (P2)
relative to the pressure side (P1).
Preferred
devices are Motorola recommended choices for future use and best overall value.
REV 1
漏
Motorola, Inc. 2002