The MPL115A2 is a miniature digital barometer from NXP Semiconductors featuring a piezoresistive pressure sensor with I2C digital output. It measures absolute pressure from 50 to 115 kPa with 1 kPa accuracy over the -40\u00b0C to +105\u00b0C temperature range, housed in a compact LGA-8 (3 x 5 x 1.2 mm) package.<\/p>\n
Product Overview The MPL115A2 is a miniature digital barometer from NXP Semiconductors featuring a piezoresistive pressure sensor with I2C digital output. It measures absolute pressure from 50 to 115 kPa with 1 kPa accuracy over the -40\u00b0C to +105\u00b0C temperature range, housed in a compact LGA-8 (3 x 5 x 1.2 mm) package. Key Specifications […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,42],"tags":[],"chip_brand":[168],"class_list":["post-6492","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-sensors","chip_brand-nxp"],"acf":{"brief_explanation":"Digital barometer, 50-115kPa, I2C, \u00b11kPa accuracy, 5\u00b5A active, factory-calibrated, LGA-8 3x5mm","date_code":"","package_case":"LGA-8 (3 x 5 x 1.2 mm)","in_stock":4300,"datasheet":"https:\/\/www.nxp.com\/docs\/en\/data-sheet\/MPL115A2.pdf","price":"$1.85","product_introduction":"The MPL115A2 from NXP Semiconductors is a compact digital barometer that integrates a MEMS piezoresistive pressure sensor, temperature sensor, ADC, and signal conditioning circuitry in a tiny 3 x 5 x 1.2 mm LGA package. The device provides digital pressure readings via an I2C interface, eliminating the need for external ADC and signal conditioning components. Factory-trimmed calibration coefficients stored in on-chip EEPROM enable the host MCU to compute temperature-compensated pressure values using a simple algorithm. With 5 \u00b5A active current at 1 sample\/second and 1 \u00b5A standby current, the MPL115A2 is ideal for battery-powered applications requiring barometric pressure measurement.","working_principle":"The MPL115A2 uses a piezoresistive MEMS pressure sensor element whose resistance changes with applied absolute pressure. An internal analog multiplexer alternately connects the pressure sensor and temperature sensor to a high-resolution ADC. The conversion results are stored in registers accessible via the I2C interface. To obtain compensated pressure, the host MCU reads both the raw ADC values and the factory calibration coefficients (a0, b1, b2, c12, c11, c22) from the device, then applies the compensation algorithm specified in the datasheet: Pcomp = a0 + (b1 + c11 * Padc + c12 * Tadc) * Padc + (b2 + c22 * Tadc) * Tadc. The final pressure in kPa is calculated as: Pkpa = Pcomp * (115 - 50) \/ 1023 + 50. The device automatically powers down between conversions to minimize power consumption.","pin_description":"
| Pin<\/th> | Name<\/th> | Function<\/th><\/tr> | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1<\/td> | SDA<\/td> | I2C Serial Data (bidirectional)<\/td><\/tr> | ||||||||||||
| 2<\/td> | GND<\/td> | Ground<\/td><\/tr> | ||||||||||||
| 3<\/td> | VDD<\/td> | Power Supply (2.375-5.5V)<\/td><\/tr> | ||||||||||||
| 4<\/td> | SCL<\/td> | I2C Serial Clock<\/td><\/tr> | ||||||||||||
| 5<\/td> | NC<\/td> | No Connect<\/td><\/tr> | ||||||||||||
| 6<\/td> | NC<\/td> | No Connect<\/td><\/tr> | ||||||||||||
| 7<\/td> | NC<\/td> | No Connect<\/td><\/tr> | ||||||||||||
| 8<\/td> | SHDN<\/td> | Shutdown (active high, pull low for normal operation)<\/td><\/tr><\/table>","application_scenarios":"The MPL115A2 is commonly used in weather stations and personal weather monitors where its low cost and digital output simplify design compared to analog pressure sensors. In GPS systems, barometric pressure data improves altitude accuracy beyond what GPS alone can provide, enabling floor-level detection in buildings. For drones, the sensor enables altimeter and variometer functions for altitude hold and navigation. In HVAC systems, it provides absolute pressure data for air flow calculations and building pressure monitoring. The ultra-low power consumption makes it suitable for battery-operated weather stations and wearable altitude trackers.","alternative_models":"
|