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NXP Semiconductors MPL3115A2R1
- Part No.:
- MPL3115A2R1
- Manufacturer:
- NXP Semiconductors
- Category:
- Pressure Sensors, Transducers
- Package:
- 8-TLGA
- Datasheet:
-
MPL3115A2R1.pdf
- Description:
- SENSOR 15.95PSIA 24BIT 8LGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MPL3115A2R1 from NXP Semiconductors is an I²C digital absolute pressure sensor with integrated altimetry and temperature measurement, operating across 20–110 kPa and −40 °C to +85 °C. It delivers 20-bit pressure (0.25 Pa LSB), 20-bit altitude (0.0625 m LSB), and 12-bit temperature (±3 °C accuracy) outputs with on-chip compensation, enabling direct altitude calculation per US Standard Atmosphere 1976. It serves as a system-level barometer/altimeter in portable navigation and environmental monitoring.
For engineers reviewing the MPL3115A2R1 datasheet, MPL3115A2R1 pinout, MPL3115A2R1 application, or MPL3115A2R1 equivalent, key selection criteria include its 8-pin LGA package, dual programmable interrupts (INT1/INT2), embedded 32-sample FIFO for autonomous logging up to 12 days, 40 µA typical active current at 1 Hz, and factory-calibrated pressure accuracy of ±0.4 kPa over 50–110 kPa.
Technical Context
The MPL3115A2R1 integrates a piezoresistive MEMS pressure sensor with an on-die temperature sensor and high-resolution ADC, performing full internal compensation for pressure and temperature before digitization. Its ASIC supports barometer and altimeter modes, with altitude derived via real-time application of the US Standard Atmosphere equation using user-configurable sea-level pressure (OFF_H register).
It features three operational states-OFF, STANDBY, and ACTIVE-with programmable oversampling ratios (1× to 128×) to trade resolution (down to 1.5 Pa RMS noise) against power (2 µA standby, 265 µA high-res mode) and acquisition speed (100 Hz one-shot, 1 Hz FIFO). Interrupt routing allows flexible event-driven data capture, including pressure/altitude thresholds, delta changes, and FIFO watermark triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | 20–110 kPa absolute - covers all terrestrial surface elevations from −700 m to 11,775 m. |
| Altitude Resolution | 0.0625 m LSB - enables sub-meter elevation detection critical for indoor navigation and drone stabilization. |
| Pressure Accuracy | ±0.4 kPa (50–110 kPa, −10 °C to 70 °C) - ensures reliable barometric weather trending and GPS-assisted dead reckoning. |
| I²C Interface | 7-bit address 0x60, up to 400 kHz - simplifies integration with ARM Cortex-M and RISC-V microcontrollers without level-shifting. |
| Supply Voltage | VDD = 1.95–3.6 V; VDDIO = 1.62–3.6 V - supports direct connection to 1.8 V or 3.3 V logic domains in wearables and IoT edge nodes. |
| Interrupt Pins | INT1 & INT2 - independently configurable for push-pull/open-drain output to trigger MCU wake-up on pressure delta, threshold crossing, or FIFO events. |
| FIFO Depth | 32 samples - stores synchronized pressure/altitude + temperature readings autonomously for up to 12 days at 1-second intervals. |
Pinout & Package
Package: 8-pin LGA (3.0 × 5.0 × 1.1 mm), RoHS-compliant, reflow-compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Analog power supply | 1.95–3.6 V main supply; requires 10 μF + 100 nF decoupling adjacent to pin 1 for stable MEMS operation. |
| CAP | External compensation capacitor | Connects to external 100 nF ceramic capacitor to stabilize internal regulator; omission causes measurement drift. |
| GND | Ground reference | Common return for analog and digital sections; must be low-impedance and separated from noisy digital GND planes. |
| VDDIO | Digital I/O supply | 1.62–3.6 V interface rail; independent of VDD, enabling mixed-voltage system interfacing (e.g., 1.8 V MCU with 3.3 V sensors). |
| INT2 | Programmable interrupt output 2 | Configurable as active-low push-pull or open-drain; routes user-selected events (e.g., FIFO full, pressure window breach). |
| INT1 | Programmable interrupt output 1 | Independent of INT2; commonly assigned to data-ready or altitude threshold alerts to reduce host polling overhead. |
| SDL | I²C serial data line | Bi-directional, open-drain; requires external pull-up to VDDIO; supports standard/fast-mode I²C up to 400 kHz. |
| SCL | I²C serial clock line | Input-only, driven by host MCU; timing compliant with I²C specification (tLOW ≥ 1.3 µs, tHIGH ≥ 0.6 µs). |
Key Features
| Feature | Design Value |
|---|---|
| On-chip temperature compensation | Eliminates need for external thermistor or MCU-based correction algorithms, reducing BOM count and firmware complexity. |
| Autonomous FIFO logging | 32-sample buffer enables battery-efficient long-duration environmental logging without host intervention or continuous I²C traffic. |
| Dual independent interrupts | Reduces MCU wake-up latency and processing load by offloading event detection (e.g., altitude breach, temperature delta) to hardware. |
| User-adjustable offset registers | Allows field calibration of pressure/altitude offsets (via OFF_H/OFF_T) to correct for mounting stress or local barometric conditions. |
| Multi-mode oversampling | 1× (8.5 µA), 16× (40 µA), or 128× (265 µA) OSR selection balances power budget against resolution requirements per application phase. |
Applications
| Smartphone Indoor Navigation | Weather Station Sensor Node |
|---|---|
|
Use Scenario: Detecting floor-level transitions and vertical movement in multi-story buildings where GPS signal is unavailable. IC Role / Device Role / Timing Role: Altitude sensor providing real-time elevation deltas with 0.3 m typical resolution to enable step-counting and elevator detection. Use Value: Enables accurate floor-change detection using only pressure differentials, eliminating reliance on magnetometer fusion or Wi-Fi fingerprinting. |
Use Scenario: Deploying low-power, battery-operated outdoor stations measuring barometric pressure trends for hyperlocal weather forecasting. IC Role / Device Role / Timing Role: Barometer delivering calibrated 0.25 Pa pressure readings every 10 seconds to track storm front progression. Use Value: Achieves ±0.4 kPa accuracy over −10 °C to 70 °C, supporting reliable short-term pressure trend analysis without frequent recalibration. |
| Drone Altitude Hold | Wearable Fitness Tracker |
|
Use Scenario: Maintaining stable hover altitude during UAV flight in GPS-denied environments such as dense forests or urban canyons. IC Role / Device Role / Timing Role: Primary altimeter feeding closed-loop PID control with 100 Hz one-shot sampling capability for responsive vertical correction. Use Value: Provides sub-meter altitude stability under dynamic thermal and vibration conditions, improving flight safety and camera gimbal smoothness. |
Use Scenario: Tracking ascent/descent during hiking or stair climbing to estimate calorie burn and activity intensity. IC Role / Device Role / Timing Role: Integrated pressure/temperature sensor delivering synchronized 20-bit altitude and 12-bit temperature data every second. Use Value: Delivers consistent elevation gain/loss metrics across varying ambient temperatures, validated by ±3 °C on-chip temperature accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BMP280TR | Higher max pressure (1100 hPa vs. 110 kPa), no FIFO, no programmable interrupts, 0.12 Pa RMS noise at 16× OSR. | Lacks autonomous logging and dual-interrupt capability; suited for static barometry, not dynamic altimetry. | Select BMP280TR when ultra-low noise (<0.2 Pa) and minimal footprint (2.0 × 2.0 mm) outweigh FIFO/interrupt needs. |
| MS5637-02BA03 | 16-bit pressure resolution (1.5 Pa LSB), no on-chip altitude conversion, SPI/I²C dual interface, ±1.5 mbar accuracy over 10–1200 mbar. | Requires host-side altitude calculation; lacks integrated temperature compensation and FIFO buffering. | Choose MS5637-02BA03 for cost-sensitive industrial barometers where host MCU handles math and timing. |
Compared with BMP280TR and MS5637-02BA03, the MPL3115A2R1 uniquely combines factory-calibrated altimetry, embedded FIFO, and dual interrupt outputs-enabling self-contained, low-power elevation tracking without host computational overhead or external memory.
Availability
MPL3115A2R1 is available at Aetrix Electronics and suitable for smartphone indoor navigation, drone altitude hold, wearable fitness tracking, and weather station sensor node applications requiring stable component supply and long-lifecycle support.
Supply support for MPL3115A2R1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with core expertise in sensor signal processing and low-power mixed-signal design.
The MPL3115A2R1 belongs to NXP's precision environmental sensor family, engineered specifically for handheld and wearable devices needing high-accuracy, low-power altimetry and barometry with minimal host resource usage.
FAQ
What is the primary function of the MPL3115A2R1?
The MPL3115A2R1 is a digital absolute pressure sensor with integrated altimetry and temperature measurement. It directly outputs compensated pressure in Pascals, altitude in meters, and temperature in °C via I²C. Its core function is to serve as a self-contained barometer and altimeter for portable and embedded systems, eliminating the need for external compensation or unit conversion in the host MCU. The MPL3115A2R1 achieves this through on-chip temperature sensing, high-resolution ADC, and real-time application of the US Standard Atmosphere equation.
Does the MPL3115A2R1 require external calibration after soldering?
The MPL3115A2R1 is factory-calibrated for sensitivity and offset across temperature and pressure ranges, and these trim values are stored in on-chip non-volatile memory. However, mechanical stress from PCB assembly can introduce board-mount drift of up to ±0.15 kPa. To realize full accuracy, users may apply runtime offset corrections via the OFF_H and OFF_T registers-these volatile adjustments override factory values without altering stored calibration. The MPL3115A2R1 does not require reprogramming of NVM for standard applications.
How does the MPL3115A2R1 handle altitude calculation?
The MPL3115A2R1 calculates altitude internally using measured absolute pressure, user-provided sea-level pressure (stored in the OFF_H register), and the US Standard Atmosphere 1976 model. It outputs altitude as a 20-bit two's complement value with 0.0625 m resolution. Unlike host-based computation, this conversion occurs on-die, ensuring consistent results regardless of MCU architecture or floating-point capability. The MPL3115A2R1 does not perform GPS fusion-it provides standalone barometric altitude referenced to local atmospheric conditions.
Can the MPL3115A2R1 operate autonomously without MCU intervention?
Yes-the MPL3115A2R1 supports fully autonomous data acquisition using its embedded 32-sample FIFO and programmable acquisition timer. Once configured via I²C, it can log pressure, altitude, and temperature at intervals from 1 second to 9 hours without further host interaction. Interrupt pins (INT1/INT2) signal FIFO watermark or data-ready events, allowing the MCU to remain in low-power sleep until needed. This autonomy makes the MPL3115A2R1 ideal for battery-powered remote sensors where minimizing MCU wake-ups extends operational life.
What are the key electrical interface requirements for the MPL3115A2R1?
The MPL3115A2R1 requires two independent supplies: VDD (1.95–3.6 V) for analog circuitry and VDDIO (1.62–3.6 V) for the I²C interface-enabling interoperability with 1.8 V or 3.3 V MCUs. Its I²C bus operates at up to 400 kHz with 7-bit address 0x60; SDA/SCL lines require external pull-ups to VDDIO. Critical layout practices include placing 10 μF + 100 nF decoupling capacitors near VDD and a 100 nF capacitor on CAP. The MPL3115A2R1 also mandates proper grounding and separation of analog/digital return paths to maintain ±0.4 kPa pressure accuracy.
MPL3115A2R1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-TLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Board Mount
- Pressure Type:
- Absolute
- Operating Pressure:
- 7.25PSI ~ 15.95PSI (50kPa ~ 110kPa)
- Output Type:
- I2C
- Output:
- 24 b
- Accuracy:
- ±0.058PSI (±0.4kPa)
- Voltage - Supply:
- 1.95V ~ 3.6V
- Port Size:
- -
- Port Style:
- No Port
- Features:
- Temperature Compensated
- Termination Style:
- SMD (SMT) Tab
- Maximum Pressure:
- 72.52PSI (500kPa)
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-LGA (3x5)
MPL3115A2R1 FAQ
1.How can I place an order for MPL3115A2R1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPL3115A2R1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MPL3115A2R1 reliable?
The price and inventory of MPL3115A2R1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPL3115A2R1 is usually 5 days.
3.What payment methods are accepted for MPL3115A2R1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPL3115A2R1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPL3115A2R1?
MPL3115A2R1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPL3115A2R1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MPL3115A2R1?
For technical support, including MPL3115A2R1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPL3115A2R1 requirements.
6.How does Aetrix verify that MPL3115A2R1 is sourced from the original manufacturer or authorized distributors?
All MPL3115A2R1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPL3115A2R1 meets industry standards.
7.What is the process for return or replacement of MPL3115A2R1?
All MPL3115A2R1 units undergo pre-shipment inspection (PSI). If there is an issue with MPL3115A2R1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MPL3115A2R1 part is unused and in its original packaging.
Return procedure for MPL3115A2R1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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