鈥?/div>
Industrial Controls
Figure 1 illustrates a schematic of the internal circuitry on the stand鈥揳lone pressure
sensor chip.
PIN 3
+ VS
MPX700
SERIES
0 to 700 kPa (0 鈥?100 psi)
60 mV FULL SCALE SPAN
(TYPICAL)
BASIC CHIP
CARRIER ELEMENT
CASE 344鈥?5, STYLE 1
DIFFERENTIAL
PORT OPTION
CASE 344C鈥?1, STYLE 1
NOTE: Pin 1 is the notched pin.
PIN 2
+ Vout
X鈥揹ucer
PIN 4
鈥?Vout
PIN 1
1
2
PIN NUMBER
Gnd
+Vout
3
4
VS
鈥揤out
Figure 1. Uncompensated 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 absolute sensor has a built鈥搃n reference vacuum. The output voltage will decrease
as vacuum, relative to ambient, is drawn on the pressure (P1) side.
The output voltage of the differential or gauge sensor increases with increasing
pressure applied to the pressure (P1) side relative to the vacuum (P2) side. Similarly,
output voltage increases as increasing vacuum is applied to the vacuum (P2) side
relative to the pressure (P1) side. This sensor is designed for applications where P1 is
always greater than, or equal to P2.
Senseon and X鈥揹ucer are trademarks of Motorola, Inc.
REV 5
Motorola Sensor Device Data
漏
Motorola, Inc. 1997
1