LPS27HHTW datasheet(19/55 Pages) STMICROELECTRONICS

Numer części	LPS27HHTW

Szczegółowy opis	MEMS pressure sensor: 260-1260 hPa absolute digital output barometer with embedded temperature sensor in water-resistant package

PDF	55 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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19 / 55 page

Application hints

Figure 15. LPS27HHTW electrical connections (top view)

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 pads of the device. The C1 capacitor can be tied to VDD

and Vdd_IO, but it is recommended to use 2 capacitors, one on each VDD and Vdd_IO line, in case VDD are

Vdd_IO are separate. Depending on the application, an additional capacitor of 4.7 µF could be placed on the VDD

line.

The functionality of the device and the measured data outputs are selectable and accessible through the I²C, MIPI

I3CSM, SPI interface. When using the I²C and MIPI I3CSM, CS must be tied to Vdd_IO.

All the voltage and ground supplies must be present at the same time to have proper behavior of the IC (refer

to Figure 15). It is possible to remove VDD while maintaining Vdd_IO without blocking the communication bus, in

this condition the measurement chain is powered off.

Note: To guarantee proper power-off of the device, it is recommended to maintain the duration of the VDD line to

GND for at least 10 ms.

LPS27HHTW

Application hints

DS13489 - Rev 1

page 19/55

LPS27HHTW Arkusz danych(PDF) 19 Page - STMicroelectronics