LPS22CH datasheet(24/55 Pages) STMICROELECTRONICS

Nome de Peças	LPS22CH

Descrição Electrónicos	High-performance MEMS nano pressure sensor: 260-1260 hPa absolute digital output barometer

PDF	55 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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24 / 55 page

Application hints

LPS22CH

24/55

DocID033100 Rev 2

Application hints

Figure 14. LPS22CH 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 VDDIO, but it is recommended to use

2 capacitors, one on each VDD and VDDIO line, in case VDD are VDDIO 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, SPI interface. When using the I²C, 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.

LPS22CH Folha de dados(PDF) 24 Page - STMicroelectronics