Overview
The LPS331APTR is an ultra-compact absolute piezoresistive pressure sensor manufactured by STMicroelectronics. This sensor integrates a monolithic sensing element and an IC interface, enabling it to convert the pressure detected by the sensing element into a digital signal. The sensing element is a suspended membrane realized on a single mono-silicon substrate using ST's dedicated VENSENS process, which ensures a small membrane size and prevents breakage with an intrinsic mechanical stopper. The IC interface is produced using a standard CMOS process, allowing high integration and dedicated circuit design trimmed to match the sensing element's characteristics. The sensor is packaged in a small holed cap land grid array (HCLGA) and operates over a temperature range of -40 °C to +85 °C.
Key Specifications
| Specification | Value |
|---|---|
| Pressure Range | 260 to 1260 mbar |
| Resolution (High-Resolution Mode) | 0.020 mbar RMS |
| Power Consumption (Low Resolution Mode) | 5.5 μA |
| Power Consumption (High Resolution Mode) | 30 μA |
| Overpressure Capability | 20x full scale |
| Temperature Compensation | Embedded |
| ADC Resolution | 24-bit |
| Output Data Rate (ODR) | Selectable from 1 Hz to 25 Hz |
| Interfaces | SPI and I2C |
| Supply Voltage | 1.71 to 3.6 V |
| Shock Survivability | 10,000 g |
| Package Type | HCLGA (Holed Cap Land Grid Array) |
| Temperature Range | -40 °C to +85 °C |
Key Features
- Ultra-compact design with small and thin package
- High-resolution mode with 0.020 mbar RMS resolution
- Low power consumption with 5.5 μA in low resolution mode and 30 μA in high resolution mode
- High overpressure capability of 20x full scale
- Embedded temperature compensation and 24-bit ADC
- Selectable output data rate from 1 Hz to 25 Hz
- SPI and I2C interfaces for communication
- Supply voltage range of 1.71 to 3.6 V
- High shock survivability of 10,000 g
- ECOPACK® lead-free compliant
- Two fully-programmable interrupt sources (INT1 and INT2) for different pressure events
Applications
The LPS331APTR is suitable for various applications requiring precise pressure measurement, such as:
- Consumer electronics (e.g., smartphones, tablets, and wearables)
- Industrial automation and control systems
- Aerospace and defense systems
- Medical devices (e.g., blood pressure monitors, respiratory equipment)
- Automotive systems (e.g., tire pressure monitoring, airbag systems)
- Environmental monitoring and weather stations
Q & A
- What is the pressure range of the LPS331APTR?
The LPS331APTR measures absolute pressure in the range of 260 to 1260 mbar.
- What are the power consumption levels of the LPS331APTR?
The sensor consumes 5.5 μA in low resolution mode and 30 μA in high resolution mode.
- What interfaces does the LPS331APTR support?
The LPS331APTR supports both SPI and I2C interfaces for communication.
- What is the temperature range for the LPS331APTR?
The sensor operates over a temperature range of -40 °C to +85 °C.
- Does the LPS331APTR have embedded temperature compensation?
Yes, the LPS331APTR has embedded temperature compensation.
- What is the resolution of the ADC in the LPS331APTR?
The ADC resolution is 24-bit.
- Can the output data rate be adjusted on the LPS331APTR?
Yes, the output data rate is selectable from 1 Hz to 25 Hz.
- Is the LPS331APTR lead-free compliant?
Yes, the LPS331APTR is ECOPACK® lead-free compliant.
- What is the shock survivability of the LPS331APTR?
The sensor has a high shock survivability of 10,000 g.
- Does the LPS331APTR have programmable interrupt sources?
Yes, the LPS331APTR has two fully-programmable interrupt sources (INT1 and INT2).
