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
MPXM2202
SERIES
Motorola Preferred Device
0 to 200 kPa (0 to 29 psi)
40 mV FULL SCALE SPAN
(TYPICAL)
Freescale Semiconductor, Inc...
MPAK PACKAGE
SCALE 1:1
CASE 1320
SCALE 1:1
CASE 1320A
X-ducer
SENSING
ELEMENT
2
4
V
out+
PIN NUMBER
1
Gnd
+V
out
3
4
V
S
鈥揤
out
2
V
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 0
漏
Motorola, Inc. 2001
For More Information On This Product,
Go to: www.freescale.com