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Pololu LPS25H - pressure and altitude sensor 126kPa I2C / SPI 3-5V

Index: PLL-02417

Sensor for measuring a pressure in the range from 26 kPa to 126 kPa with a accuracy at level of ± 0,02 kPa. The measurement result can be easily converted to altitude. In comparison to the version of the LPS331AP, sensor has a higher precision and reduced noise level.

€7.33
€5.96 tax excl.

Unavailable
Discontinued product
30-day returns
Manufacturer: Pololu

Attention!

The product has been discontinued. Check others products in category.

Specification

  • Supply voltage: 2.5 V - 5.5 V
  • Current consumption: 2 mA
  • Communication interface: I2C (TWI) or SPI
  • Measurement range: 26 kPa to 126 kPa (260 mbar to 1260 mbar)
  • Data format: 24-bits
  • Built-in FIFO buffer
  • Accuracy:
    • for temperature: +20 ~ +60 °C: +/- 0,02 kPa
    • for temperature: 0 ~ +80 °C: +/- 0.1 kPa
  • Module size: 10.2 x 23.0 x 2.54 mm
  • Weight: 0.6 g (without connectors)

 

 

Description

The module includes a pressure sensor MEMS LPS25H from the ST company, which operates in the range from 26 kPa to 126 kPa. Compared to the version of the LPS331AP, with which the pin is compatible, it is characterized by a higher accuracy (up to 0.02 kPa) and lower noise (0,001 kPa). It also has a built-in buffor FIFO, in which stored can be the measurement data before transmission. On the board are also required passive components and voltage regulator low-droput which enables the operation of the sensor with systems of 3.3 V and 5 V.


System LPS25H (documentation) has a built-in temperature compensation and a lot of configurable options, including: selectable resolutions, as well as two programmable external interrupts. The communication interface is I2C or SPI bus.

 

The product is compatible with Arduino

The manufacturer has prepared an Arduino library for the sensor LPS25H which allows for the simple maintenance of the sensor, using the module of Arduino.

 

Connection

The sensor has eight pins for the installation of goldpin connectors - 2.54 mm pitch (included).

 

The power supply is in the range of 2.5 V to 5.5 V, it should be connected to pins VIN and GND. In the case of using the system powered with a voltage of 3.3 V, the VIN pin can be left disconnected, and the power supply should be brought directly to the system via pin VDD.

 

The system communicates via a digital I2C or SPI interface. Voltage of the logic signals of the bus must have the same value as the supply voltage supplied to VIN. In the case of using I2C bus, the SCL and SDA pins should be connected. SPI requires the connection of 4 pins: SDI, SDO, CS and SPC.

 

LPS25H - czujnik ciśnienia i wysokościu z regulatorem napięcia - moduł Pololu     LPS25H - schemat wyprowadzeń

 

PINDescription<
SDA
SDI
SDO
The data line of the I2C bus, the line of the input SPI data (SDO in 3-wire mode). High status is equal to the voltage VIN, low GND.
SCL
SPC
Clock line of the I2C bus. High status is equal to voltage VIN, low GND.
SDO
SA0
The output data line of SPI bus (data-out) or change of address in case of I2C. High status is equal to VDD voltage, low GND. These pins do not have a voltage converter - they only work with a voltage of 3.3 V.
CS Chip select - SPI Enable. The pin is by default in high status (active I2C interface) to begin to communicate in SPI, you must specify the low status.
INT1 Programmable interrupts - high status is equal to voltage of 3.3 V, low GND. These pins do not have a voltage converter - they only work with a voltage of 3.3 V.
VIN Supply voltage is from 2.5 V to 5.5 V.
VDD In the case where the voltage is higher than 3.3 V, the pin can be the voltage output of 3.3 V with maximum current of up to 150 mA.
GND The potential of the ground of the system.

 

The I2C bus

By default, the system uses the I2C interface - the CS output is in high state (pulled up, using a resistor to VDD). Details about the I2C communication, can be found in the documentation and in cataloge note from NXP, about the specification of I2C bus.

The sensor has a 7-bit address, whose latest bit is determined with the help of the status on pin SA0. The pin is pulled up to VDD through a 10 kΩ resistor, what determines the address to a value of 1011101b.

The bus operates correctly with a frequency of 400 MHz (fast mode), higher values may work correctly but have not been tested.

 

The SPI bus

To choose the connection via the SPI, at pin CS, specified should be the low status (connected to ground). The details of the transfer and a description of the registers is in the documentation of the system.

 

Tips of first use

All the necessary information about communication and service of the module, are in the documentation. Below are several basic facts:

  • By default, the pressure sensor is in the mode of low consumption of energy, to run it, you must enter the appropriate value to the CTRL_REG1 register.
  • Possible is a multi-read and multi-write using one command of I2C, through the setting of the most significant bit of the address (starting autoinkrementation).
  • You can run autoinkrementation mode in SPI mode through setting the MS bit - details in documentation.

 

 

Same day shipping

Posting the payment for the order on our account on a business day up to 10 AM means sending the goods on the same day!

The time of payment depends on the ELIXIR's hours session of the sender's bank and the recipient of the transfer. It may take up to 2-4 working days.

Free delivery for orders exceeding 300 PLN!

Only for prepaid orders shipped to Poland.

Terms of delivery outside of Poland

GLS - zone 1

Austria, Belgium, Croatia, The Czech Republic, Denmark, Germany, Netherlands, Slovakia

  • Delivery time: 2-4 days
  • Delivery cost: 35 PLN
  • Insurance: 5000 PLN
GLS - zone 2

Bulgaria, Estonia, France, Hungary, Italy, Latvia, Lithuania, Luxembourg, Portugal, Romania, San Marino, Slovenia, The United Kingdom

  • Delivery time: 2-5 days
  • Delivery cost: 50 PLN
  • Insurance: 5000 PLN
Kurier GLS - zone 3

Finland, Greece, Ireland, Liechtenstein, Serbia, Spain, Switzerland, Sweden

  • Delivery time: 2-7 days
  • Delivery cost: 80 PLN
  • Insurance: 5000 PLN

Terms of delivery in Poland

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Poczta Polska
  • Delivery time: 1-3 days
  • Payment in advance: od 9,90 PLN
  • Cash on delivery: 17,90 PLN
  • Insurance: 1000 PLN
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Kurier GLS
  • Delivery time: 1-2 days
  • Payment in advance: od 14,90 PLN
  • Cash on delivery: 22,90 PLN
  • Insurance: 6000 PLN
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Paczkomaty 24/7
  • Delivery time: 1-3 days
  • Payment in advance: od 12,90 PLN
  • Over 8000 parcel lockers
  • Insurance: 200 PLN
  • Free delivery of orders over 300 PLN does not apply to parcels addressed outside of Poland.
  • The delivery period is counted in working days from the date of dispatch of the order.

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