Instructions
Table Of Contents
- Introduction
- Sensor specifications
- Pinning information
- Digital interface
- Application circuit
- Reading digital output data
- Reading analog pressure data
- Physical dimensions
- Manufacturing information
- Important notes
- Legal notice
- License terms for Würth Elektronik eiSos GmbH & Co. KG sensor product software and source code
5 Application circuit
RSVD
RSVD
NC
VDD
SCL
SDA
GND
VOUT
220 nF
R
p
VDD
R
p
VDD
15 nF
1
2
3
4
8
7
6
5
Figure 8: Application circuit with I
2
C interface (top view)
VDD pin is the central supply pin for the MEMS cell and internal circuits. In order to prevent
ripple from the power supply, a decoupling capacitor of 220 nF must be placed as close to
the VDD pad of the sensor as possible. Further, a decoupling capacitor of 15 nF should be
placed between VOUT and ground.
If both digital I
2
C and analog interfaces are used simultaneously, it is recom-
mended to route these lines as far from each other as possible.
SCL and SDA must be connected to VDD through the pull-up resistors. Proper value of the
pull-up resistors must be chosen depending on the I
2
C bus speed and load. The sensor
does not have internal pull-up resistors.
Avoid routing of the VDD, SDA/SCL and GND lines underneath the sensor (See section
8.2
for further information).
Differential Pressure Sensor, Part Nr. 25131308xxx01
User manual version 1.0 © August 2019
www.we-online.com/sensors 21