LPS27HHW - MEMS Pressure Sensor, 260-1260 hPa | STMicroelectronics
N.º de pieza: LPS27HHW ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.5 | $2,50 |
| 10 | $2.25 | $22,50 |
| 100 | $2 | $200,00 |
| 500 | $1.8 | $900,00 |
| 1.000 | $1.6 | $1.600,00 |
LPS27HHW Descripción general
A MEMS pressure sensor is a micro-electromechanical system that measures absolute or gauge pressure by detecting the deflection of a thin silicon membrane. The LPS27HHW belongs to the category of barometric pressure sensors, which are used to measure atmospheric pressure and altitude. In the broader system hierarchy, it is a sensor component within the larger category of environmental sensors, which also include temperature, humidity, and gas sensors. These sensors are essential in applications such as weather stations, drones, and smartphones for altitude and navigation.
Key features of the LPS27HHW include a pressure sensing range of 260 to 1260 hPa, an absolute pressure accuracy of ±0.1 hPa, and a temperature accuracy of ±0.5 °C. The device supports both I2C and SPI interfaces, with I2C addresses 0x5C and 0x5D selectable via the SA0 pin. It operates from a supply voltage of 1.7 V to 3.6 V, with a low power consumption of 4 µA at 1 Hz output data rate. The sensor also features a 24-bit pressure output and a 16-bit temperature output, providing high resolution for precise measurements.
The LPS27HHW is built on ST's proven MEMS technology, which ensures high reliability and long-term stability. The device includes an internal signal conditioning chain, an analog-to-digital converter, and a digital interface, all integrated into a single chip. The sensor's low noise and high resolution make it ideal for applications requiring accurate pressure and altitude measurements, such as drone altitude hold, smartphone barometer, and weather station monitoring.
Typical applications include drone altitude control, where the sensor provides precise altitude data for stable flight; smartphone barometer for indoor navigation and weather forecasting; and industrial pressure monitoring for HVAC systems. The sensor's small footprint and low power consumption make it suitable for battery-powered devices.
When designing with the LPS27HHW, ensure proper PCB layout with a small vent hole to expose the pressure port to the environment. Avoid placing the sensor near heat sources or in direct airflow to minimize measurement errors. The I2C pull-up resistors should be sized appropriately for the bus speed and capacitance.
Alternativas directas para LPS27HHW — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LPS27HHW (mismo factor de forma y huella) — difiere en Current Consumption, I2C Address, Operating Temperature, Package, Supply Voltage.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LPS22HH
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.9705 / unidad
Ver hoja de datos →LPS28DFW
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LPS27HHW Valores máximos y características eléctricas
| Pressure Range | 260 to 1260 hPa |
| Absolute Pressure Accuracy | ±0.1 hPa |
| Temperature Accuracy | ±0.5 °C |
| Pressure Output Resolution | 24-bit |
| Temperature Output Resolution | 16-bit |
| Tensión de alimentación | 1.7 V to 3.6 V |
| Current Consumption | 4 µA at 1 Hz ODR |
| Interfaz | I2C and SPI |
| I2C Address | 0x5C or 0x5D (selectable) |
| Output Data Rate | 1 Hz to 200 Hz |
| Encapsulado | LGA-8 (2.0 x 2.0 x 0.7 mm) |
| Temperatura de funcionamiento | -40 °C to +85 °C |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Nivel MSL | 1 |
Configuración de pines de LPS27HHW
| Pin 1 | VDD — Power supply input (1.7V to 3.6V) |
| Pin 2 | GND — Ground |
| Pin 3 | SCL/SPC — I2C clock or SPI clock |
| Pin 4 | SDA/SDI — I2C data or SPI data input |
| Pin 5 | SA0 — I2C address selection (0x5C or 0x5D) |
| Pin 6 | CS — Chip select for SPI (active low) |
| Pin 7 | INT — Interrupt output |
| Pin 8 | NC — No connection |
Aplicaciones típicas
LPS27HHW es adecuado para 6 aplicacións: Drone Altitude Hold, Smartphone Barometer, Weather Station, Industrial Pressure Monitoring, Wearable Fitness Tracker, Indoor Navigation.
Drone Altitude Hold
The LPS27HHW provides precise altitude measurements for drones, enabling stable flight and accurate altitude hold. Its high accuracy (±0.1 hPa) and low power consumption (4 µA) make it ideal for battery-powered UAVs. The sensor's small footprint allows easy integration into drone flight controllers. In a typical drone application, the LPS27HHW is connected to the flight controller via I2C, and its pressure data is fused with accelerometer and gyroscope data to estimate altitude. The sensor's 24-bit resolution ensures smooth altitude readings, reducing noise in the control loop. Compared to lower-accuracy sensors, the LPS27HHW improves altitude hold precision by up to 50%, enhancing flight stability and safety.
Recomendado
Smartphone Barometer
The LPS27HHW is used in smartphones for barometric pressure sensing, enabling indoor navigation, weather forecasting, and altitude-based features. Its compact LGA-8 package (2.0 x 2.0 x 0.7 mm) fits easily into the limited space of a smartphone PCB. The sensor's low power consumption extends battery life, and its I2C/SPI interface simplifies integration with the application processor. In a smartphone, the LPS27HHW is typically placed near the edge of the board with a small vent hole to the outside. The sensor's high accuracy (±0.1 hPa) allows detection of floor-level changes in buildings, enabling precise indoor navigation. Compared to older sensors, the LPS27HHW offers better temperature stability, reducing drift over time.
Recomendado
Weather Station
The LPS27HHW is ideal for weather stations, providing accurate atmospheric pressure measurements for weather forecasting and climate monitoring. Its wide pressure range (260-1260 hPa) covers all global atmospheric conditions, and its high accuracy (±0.1 hPa) ensures reliable data. The sensor's low power consumption allows battery-powered weather stations to operate for extended periods. In a weather station, the LPS27HHW is connected to a microcontroller via SPI, and pressure data is logged at regular intervals. The sensor's 24-bit resolution captures subtle pressure changes, enabling detection of weather fronts. Compared to analog sensors, the LPS27HHW offers digital output, simplifying data acquisition and reducing noise.
Recomendado
Industrial Pressure Monitoring
The LPS27HHW is used in industrial applications for monitoring air pressure in HVAC systems, pneumatic controls, and leak detection. Its robust design and wide operating temperature range (-40°C to +85°C) make it suitable for harsh environments. The sensor's I2C/SPI interface allows easy integration with industrial controllers. In an HVAC system, the LPS27HHW is placed in the air duct to measure static pressure, enabling efficient fan speed control. The sensor's high accuracy ensures precise pressure regulation, improving energy efficiency. Compared to traditional pressure transducers, the LPS27HHW offers a smaller form factor and lower cost, making it ideal for distributed sensing networks.
Recomendado
Wearable Fitness Tracker
The LPS27HHW is used in wearable devices to track altitude changes during activities like hiking or climbing. Its low power consumption (4 µA) is critical for battery-powered wearables, and its small package fits into compact designs. The sensor's high resolution enables accurate step counting and altitude gain measurement. In a fitness tracker, the LPS27HHW is integrated with an accelerometer to detect motion and calculate altitude changes. The sensor's data is processed by a low-power MCU to provide real-time feedback to the user. Compared to GPS, the LPS27HHW consumes significantly less power, extending battery life. Its accuracy of ±0.1 hPa allows detection of altitude changes as small as 1 meter.
Recomendado
Indoor Navigation
The LPS27HHW enables indoor navigation by detecting floor-level changes in buildings. Its high accuracy (±0.1 hPa) allows the sensor to distinguish between different floors, which is essential for navigation in shopping malls, airports, and hospitals. The sensor's low power consumption makes it suitable for continuous operation in mobile devices. In an indoor navigation system, the LPS27HHW is used in conjunction with Wi-Fi or Bluetooth beacons to provide accurate positioning. The sensor's pressure data is fused with other sensor data to estimate the user's vertical position. Compared to GPS, which is unreliable indoors, the LPS27HHW provides a reliable solution for floor detection. Its compact size and digital interface simplify integration into smartphones and other portable devices.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LPS27HHW — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LPS22HH | LPS28DFW | BMP388 | MS5637 |
|---|---|---|---|---|---|
| Package | LGA-8 (2.0 x 2.0 x 0.7 mm) | LGA-8 (2.0 x 2.0 x 0.7 mm) - same | LGA-8 (2.0 x 2.0 x 0.7 mm) - same | LGA-10 (2.0 x 2.0 x 0.75 mm) - different | QFN-10 (3.0 x 3.0 x 0.9 mm) - different |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Bosch | TE Connectivity |
| Pressure Range | 260 to 1260 hPa | 260 to 1260 hPa | 260 to 1260 hPa | 300 to 1250 hPa | 10 to 1200 hPa |
| Accuracy | ±0.1 hPa | ±0.1 hPa | ±0.1 hPa | ±0.5 hPa | ±0.5 hPa |
| Interface | I2C and SPI | I2C and SPI | I2C and SPI | I2C and SPI | I2C only |
| Supply Voltage | 1.7 V to 3.6 V | 1.7 V to 3.6 V | 1.7 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Current Consumption | 4 µA at 1 Hz | 4 µA at 1 Hz | 3 µA at 1 Hz | 3.4 µA at 1 Hz | 1 µA at 1 Hz |
| Output Resolution | 24-bit pressure, 16-bit temperature | 24-bit pressure, 16-bit temperature | 24-bit pressure, 16-bit temperature | 24-bit pressure, 16-bit temperature | 24-bit pressure, 16-bit temperature |
Diferenciadores clave
- Higher accuracy than BMP388 (frente a BMP388)
- Lower power consumption than LPS22HH (frente a LPS22HH)
- Smaller package than MS5637 (frente a MS5637)
Notas de diseño
Ensure a small vent hole (0.5 mm) is placed on the PCB directly under the pressure port of the LPS27HHW to allow ambient air to reach the sensor. The vent hole should be protected with a mesh or filter to prevent dust and moisture ingress. Place the sensor away from heat sources and high-airflow areas to minimize measurement errors.
Decouple the VDD pin with a 100 nF ceramic capacitor placed as close as possible to the sensor. For noisy power rails, add a 1 µF capacitor in parallel. The LPS27HHW operates from 1.7 V to 3.6 V, so ensure the supply voltage is stable and within this range to maintain accurate measurements.
Avoid exposing the sensor to direct water or condensation, as this can damage the MEMS membrane. Do not apply excessive pressure beyond the absolute maximum rating of 20 atm. When using I2C, ensure pull-up resistors are sized correctly for the bus speed and capacitance. The SA0 pin must be tied to VDD or GND to select the I2C address.
Información de cumplimiento
RoHS and REACH compliant per STMicroelectronics product page. Not AEC-Q100 qualified.
