鈥?/div>
Non鈥揑nvasive Blood Pressure Measurement
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
MPX2050
SERIES
0 to 50 kPa (0 to 7.25 psi)
40 mV FULL SCALE SPAN
(TYPICAL)
MPX2050D
CASE 344
MPX2050GP
CASE 344B
2
4
SENSING
ELEMENT
V
out+
V
out-
MPX2050DP
CASE 344C
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).
1
2
MPX2050GSX
CASE 344F
PIN NUMBER
Gnd
+V
out
3
4
V
S
鈥揤
out
NOTE: Pin 1 is noted by the notch in
the lead.
REV 8
Motorola Sensor
漏
Motorola, Inc. 2002
Device Data
1