Overview
The LPS35HWTR is a high-resolution, ultra-compact MEMS pressure sensor produced by STMicroelectronics. This device functions as a digital output barometer with a water-resistant package, making it suitable for various applications where environmental durability is crucial. The LPS35HWTR integrates a sensing element based on a piezoresistive Wheatstone bridge approach and an IC interface that communicates through I²C or SPI interfaces. It is designed to provide accurate pressure and temperature readings over a wide range of conditions.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Pressure Range | 260 | - | 1260 | hPa |
| Operating Temperature Range | -40 | - | +85 | °C |
| Pressure Output Data Bits | - | - | 24 | - |
| Temperature Output Data Bits | - | - | 16 | - |
| Output Data Rate (ODR) | 1 | - | 75 | Hz |
| Supply Voltage (VDD) | 1.7 | - | 3.6 | V |
| Supply Current @ ODR 1 Hz | - | 3 | 15 | µA |
| Power-Down Current | - | - | 1 | µA |
| Communication Interfaces | - | - | I²C, SPI | - |
| Package Type | - | - | HLGA-10L | - |
Key Features
- Water-resistant package, suitable for harsh environments.
- High overpressure capability: up to 20 times the full scale.
- Embedded temperature compensation for accurate readings.
- 24-bit pressure data output and 16-bit temperature data output.
- Adjustable output data rate from 1 Hz to 75 Hz.
- I²C and SPI communication interfaces.
- Embedded FIFO (32 slots) for efficient data handling.
- Interrupt functions: Data Ready, FIFO flags, pressure thresholds.
- Low power consumption: down to 3 µA at 1 Hz ODR.
- ECOPACK® lead-free compliant package.
Applications
- Wearable devices.
- Altimeter and barometer for portable devices.
- GPS applications.
- Weather station equipment.
Q & A
- What is the operating pressure range of the LPS35HWTR?
The LPS35HWTR operates within a pressure range of 260 to 1260 hPa.
- What are the communication interfaces available on the LPS35HWTR?
The device supports both I²C and SPI communication interfaces.
- What is the resolution of the pressure and temperature data outputs?
The pressure data output is 24 bits, and the temperature data output is 16 bits.
- What is the power consumption of the LPS35HWTR at 1 Hz ODR?
The power consumption at 1 Hz ODR can be as low as 3 µA.
- Does the LPS35HWTR have built-in temperature compensation?
- What is the maximum overpressure capability of the LPS35HWTR?
The device can withstand pressure up to 20 times its full scale.
- What types of packages are available for the LPS35HWTR?
The device is available in an HLGA-10L package.
- Is the LPS35HWTR suitable for use in harsh environments?
- What is the purpose of the FIFO in the LPS35HWTR?
The FIFO allows for efficient data handling by storing pressure and temperature output values, reducing the need for continuous polling by the host processor.
- Can multiple LPS35HWTR devices be connected to the same I²C lines?
