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ILPS28QSW 数据表(PDF) 21 Page - STMicroelectronics

部件名 ILPS28QSW
功能描述  Dual full-scale, 1260 hPa and 4060 hPa, absolute digital output barometer with Qvar detection in a water-resistant package
PDF  52 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ILPS28QSW 数据表(HTML) 21 Page - STMicroelectronics

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7
Application hints
Figure 14. ILPS28QSW electrical connections
1
2
3
4
5
6
7
SDA
AH1/QVAR1
SCL
AH2/QVAR2
GND
VDD
C1
Figure 15. AH (analog hub) / Qvar external connections to pin 2, pin 4
AH1/QVAR1 (Pin 2)
AH2/QVAR2 (Pin 4)
D2
Name
Value
C1
10nF
R1,R2
500 Ohm
D1,D2
ESD Diode*
C1
D1
Electrode 2
Electrode 1
*ST ESDALCL5-1BM2 is reference as ST catalog product but other similar features of ESD diode also can be used.
R1
R2
The device power supply must be provided through the VDD line; a power supply decoupling capacitor C1 (100
nF) must be placed as near as possible to the supply pins of the device. Depending on the application, an
additional capacitor of 4.7 μF could be placed on the VDD line.
In case the AH (analog hub) / Qvar is not used, both AH1/QVAR1 (pin 2) and AH2/QVAR2 (pin 4) need to
be connected to GND. Otherwise, when the AH (analog hub) / Qvar function is enabled in the application, the
external network (see Figure 15) needs to be connected to both pin 2 and pin 4.
The functionality of the device and the measured data outputs are selectable and accessible through the I²C, MIPI
I3CSM interface.
ILPS28QSW
Application hints
DS13905 - Rev 1
page 21/52



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