Data Sheet

7

Revision 1.1, 2015-07-29

KP254

Digital Absolute Pressure Sensor

Functional Description

2.3

Block Diagram

Figure 2 shows the functional block diagram.

Figure 2

Functional block diagram

2.4

Transfer Function Pressure

The KP254 device is fully calibrated on delivery. The sensor has a linear transfer function between the applied

pressure and the digital output signal.

Figure 3

Pressure transfer function

Temperature

Sensor

Pressure

Cells

ADC

ADC

Digital

Signal

Processing

Normal Mode/

Diagnosis Mode

Temperature

Compensation

Digital Core

SPI

Interface

E²PROM

Interface

E²PROM

Voltage

Regulator

digital

analog

Reset

VDDA

VDDD

NCS

CLK

SDI

SDO

GND

NC

0

pressure [kPa]

0

511

1023

20

40

60

80

100

120

140

operating pressure range

maximum input pressure range

160

180

200

Zoo

m