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LPS27HHW Arkusz danych(PDF) 47 Page - STMicroelectronics

Numer części LPS27HHW
Szczegółowy opis  MEMS pressure sensor: 260-1260 hPa absolute digital output barometer with water-resistant package
PDF  60 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LPS27HHW Arkusz danych(HTML) 47 Page - STMicroelectronics

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LPS27HHW
Register description
60
LOW_NOISE_EN is disabled by default and must be changed when the device is in power-
down mode. It enables low-noise mode but can be used when the ODR is lower than
100 Hz. If ODR = 100 Hz or ODR = 200 Hz, this option is automatically switched off and the
value of the low-noise enable bit is ignored.
LOW_NOISE_EN mode is enabled to have less RMS noise and the best performance is
achieved with LOW_NOISE_EN set to 1 and filter at ODR/20. Depending on the application,
the LOW_NOISE_EN bit can be enabled (low-noise mode) or disabled (low-current mode)
to have less RMS noise or less power consumption (refer to the following table).
The ONE_SHOT bit is used to start a new conversion when the ODR[2:0] bits in
CTRL_REG1 (10h) are set to '000'. Writing a '1' in ONE_SHOT triggers a single
measurement of pressure and temperature. Once the measurement is done, the
ONE_SHOT bit will self-clear, the new data are available in the output registers, and the
STATUS (27h) bits are updated.
Table 21. RMS noise and power consumption
Mode
Additional low-pass
filter status
Device bandwidth RMS noise [Pa]
Supply current
@ ODR = 1 Hz [μA]
Low noise
Disabled
1.8
12
Enabled
ODR/9
1
12
Enabled
ODR/20
0.7
12
Low current
Disabled
5.6
4
Enabled
ODR/9
3.2
4
Enabled
ODR/20
2.1
4



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