MPX2100

Sensors

2

Freescale Semiconductor

Pressure

Figure 1 shows a block diagram of the internal circuitry on the stand-alone pressure sensor chip.

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 absolute sensor has a built-in 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

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).

3

Sensing

Element

Thin Film

Temperature

Compensation

and Calibration

Circuitry

2

4

1

GND