LPS22DF datasheet(19/54 Pages) STMICROELECTRONICS

Part #	LPS22DF

Description	Low-power and high-precision MEMS nano pressure sensor: 260-1260 hPa absolute digital output barometer

PDF	54 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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19 / 54 page

Application hints

Figure 14. LPS22DF 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 pins 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 14). 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.

LPS22DF

Application hints

DS13316 - Rev 1

page 19/54

LPS22DF Datasheet(PDF) 19 Page - STMicroelectronics