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Visitor II
April 1, 2021
Solved

Diference between LSP27HHW and LSP27HHWT?

  • April 1, 2021
  • 2 replies
  • 1095 views

The LSP27HHW also embeds a temperature sensor.

Comparing the datasheet, I can´t find any diference.

Why LPS27HHTW is 1€ more expensive?

    This topic has been closed for replies.
    Best answer by Eleon BORLINI

    Hi @APere.7​ ,

    the difference between the two part numbers relies on the fact that the LPS27HHTW not only has an embedded temperature sensor, but is also calibrated at production level to guarantee a Temperature accuracy in the ±1.5 °C range, as you can see from the datasheet, p.1.

    This is the price difference root cause: however, if you have a temperature reference on your system, you can of course calibrate the LPS27HHW embedded temperature sensor (in offset at 25°C and gain versus temperature in the defined range) via software, getting the desired accuracy. This is useful especially in post-solder condition.

    -Eleon

    2 replies

    ST Employee
    April 6, 2021

    Hi @APere.7​ ,

    the difference between the two part numbers relies on the fact that the LPS27HHTW not only has an embedded temperature sensor, but is also calibrated at production level to guarantee a Temperature accuracy in the ±1.5 °C range, as you can see from the datasheet, p.1.

    This is the price difference root cause: however, if you have a temperature reference on your system, you can of course calibrate the LPS27HHW embedded temperature sensor (in offset at 25°C and gain versus temperature in the defined range) via software, getting the desired accuracy. This is useful especially in post-solder condition.

    -Eleon

    APere.7Author
    Visitor II
    June 4, 2021

    Thank you.

    I have an other question for this sensor.

    The pressure range given in darasheet is 260-1260 hPa. But they can read until 1544 hPa without problems (aparentely).

    I coudn´t aprecciate any desviation or error in measure out of spectication.

    Could i have any information about the Relative accuracy in the range 1260-1544hPa?

    And finally, I would like to congratulate you for this sensor.

    I consider it to be the best and most accurate barometric sensor on the market.

    APere.7Author
    Visitor II
    June 4, 2021

    Thank you.

    I have an other question for this sensor.

    The pressure range given in darasheet is 260-1260 hPa. But they can read until 1544 hPa without problems (aparentely).

    I coudn´t aprecciate any desviation or error in measure out of spectication.

    Could i have any information about the Relative accuracy in the range 1260-1544hPa?

    And finally, I would like to congratulate you for this sensor.

    I consider it to be the best and most accurate barometric sensor on the market.