Overview
The LPS25HTR, produced by STMicroelectronics, is an ultra-compact piezoresistive absolute pressure sensor. It functions as a digital output barometer, comprising a sensing element and an IC interface that communicates through I²C or SPI. The sensing element, manufactured using a dedicated process developed by ST, consists of a suspended membrane that detects absolute pressure. The device is packaged in a cavity holed LGA package (HCLGA) and is guaranteed to operate over a temperature range of -30 to +105 °C.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Pressure Range | 260 | - | 1260 | hPa |
| Pressure Resolution (High-Resolution Mode) | - | - | 1 Pa RMS | - |
| Supply Voltage | 1.7 | - | 3.6 | V |
| Supply Current (Low-Resolution Mode) | - | - | 4 μA | - |
| Supply Current (High-Resolution Mode) | - | - | 25 μA | - |
| Output Data Resolution | - | - | 24 bits | - |
| Output Data Rate (ODR) | 1 Hz | - | 25 Hz | - |
| Communication Interfaces | - | - | SPI, I²C | - |
| Temperature Range | -30 | - | 105 | °C |
| Package Dimensions | - | - | 2.5 x 2.5 x 1.0 mm | - |
Key Features
- High-resolution mode with 1 Pa RMS resolution
- Low power consumption: 4 μA in low-resolution mode and 25 μA in high-resolution mode
- High overpressure capability: 20x full scale
- Embedded temperature compensation
- 24-bit pressure data output
- Selectable ODR from 1 Hz to 25 Hz
- SPI and I²C communication interfaces
- Embedded FIFO for storing up to 32 pressure output values
- Interrupt functions: Data Ready, FIFO flags, pressure thresholds
- Supply voltage range: 1.7 to 3.6 V
- High shock survivability: 10,000 g
- ECOPACK® lead-free compliant
Applications
- Altimeter and barometer for portable devices
- GPS applications
- Weather station equipment
- Sport watches
Q & A
- What is the operating pressure range of the LPS25HTR?
The operating pressure range is from 260 to 1260 hPa.
- What are the communication interfaces available on the LPS25HTR?
The device supports both SPI and I²C communication interfaces.
- What is the resolution of the pressure data output?
The pressure data output has a resolution of 24 bits.
- What is the power consumption in high-resolution mode?
The power consumption in high-resolution mode is 25 μA.
- Does the LPS25HTR have embedded temperature compensation?
Yes, the LPS25HTR has embedded temperature compensation.
- What is the temperature range for the LPS25HTR?
The device operates over a temperature range of -30 to +105 °C.
- What is the package size of the LPS25HTR?
The package dimensions are 2.5 x 2.5 x 1.0 mm.
- Is the LPS25HTR lead-free compliant?
Yes, the LPS25HTR is ECOPACK® lead-free compliant.
- What are some typical applications of the LPS25HTR?
Typical applications include altimeters and barometers for portable devices, GPS applications, weather station equipment, and sport watches.
- Does the LPS25HTR have an embedded FIFO?
Yes, the LPS25HTR embeds a FIFO register that can store up to 32 pressure output values.
