鈥?/div>
Altimeters
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
MPXM2102
SERIES
Motorola Preferred Device
0 to 100 kPa (0 to 14.5 psi)
40 mV FULL SCALE SPAN
(TYPICAL)
SCALE 2:1
CASE 1320A鈥?2
MPAK, STYLE 1
SCALE 2:1
CASE 1320A鈥?2
MPAK, STYLE 2
PIN NUMBER
1
2
4
V
out+
V
out-
Gnd
+V
out
3
4
V
S
鈥揤
out
X-ducer
SENSING
ELEMENT
2
Figure 1. Temperature Compensated Pressure Sensor Schematic
VOLTAGE OUTPUT versus APPLIED DIFFERENTIAL PRESSURE
The differential voltage output of the X鈥揹ucer 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.
X鈥揹ucer is a trademark of Motorola, Inc.
REV 0
漏
Motorola, Inc. 2000