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Non--Invasive Blood Pressure Measurement
Figure 1 shows a block diagram of the internal circuitry on the stand--alone pressure
sensor chip.
V
S
3
THIN FILM
TEMPERATURE
COMPENSATION
AND
CALIBRATION
CIRCUITRY
1
GND
MPXM2053
SERIES
Freescale Semiconductor Preferred Device
0 to 50 kPa (0 to 7.25 psi)
40 mV FULL SCALE SPAN
(TYPICAL)
MPAK PACKAGE
SCALE 1:1
MPXM2053D/DT1
CASE 1320
SCALE 1:1
2
4
X--ducer
SENSING
ELEMENT
V
out+
V
out--
MPXM2053GS/GST1
CASE 1320A
PIN NUMBER
1
2
Gnd
+V
out
3
4
V
S
--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 Freescale Semiconductor recommended choices for future use and best overall value.
漏
Freescale Semiconductor, Inc., 2004. All rights reserved.
MPXM2053 SERIES
1
Sensor Device Data
Freescale Semiconductor