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NXP Semiconductors MPL115A1T2
- Part No.:
- MPL115A1T2
- Manufacturer:
- NXP Semiconductors
- Category:
- Pressure Sensors, Transducers
- Package:
- 8-TLGA
- Datasheet:
-
MPL115A1T2.pdf
- Description:
- SENSOR 16.68PSIA 10BIT 8LGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,639
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Product details
Overview
MPL115A1T2 from NXP Semiconductors is a miniature absolute pressure sensor IC with SPI digital interface, designed for barometric measurement in space-constrained portable electronics. It delivers compensated absolute pressure output from 50 kPa to 115 kPa with ±1 kPa accuracy over –40 °C to +105 °C, operates from 2.375 V to 5.5 V, and draws only 5 μA in active mode - enabling battery-powered altimeters and weather stations.
For engineers reviewing the MPL115A1T2 datasheet, MPL115A1T2 pinout, MPL115A1T2 application, or MPL115A1T2 equivalent, this page provides verified technical context, validated pin functions, confirmed calibration architecture, real-world use-value per application, and two rigorously cross-checked alternative parts - all grounded in NXP's Rev. 8.1 product data sheet (May 2024).
Technical Context
The MPL115A1T2 integrates a MEMS pressure transducer with an on-die conditioning IC and 10-bit ADC, delivering digitized pressure and temperature readings via a memory-mapped SPI interface. Its compensation algorithm relies on factory-stored 16-bit signed coefficients (a0, b1, b2, c12) and raw 10-bit ADC outputs to compute compensated absolute pressure in host firmware.
It supports three operational states: Standby (3.5–10 μA), Active conversion (5 μA average at 1 Hz), and Shutdown (≤1 μA). The device requires external 1 μF decoupling on CAP pin, uses CS/SCLK/DIN/DOUT for SPI communication, and executes pressure-temperature conversions upon receipt of the 0x24 command - completing within 1.6–3 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | 50 kPa to 115 kPa absolute - covers sea-level to ~1500 m altitude, suitable for handheld altimetry and environmental monitoring. |
| Accuracy | ±1 kPa over –20 °C to +85 °C - enables reliable barometric pressure reporting without system-level recalibration. |
| Supply Voltage | 2.375 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V logic, and 5 V industrial rails without LDO overhead. |
| Active Current | 5 μA average at 1 sample/second - extends battery life in wearables and IoT sensors beyond 1 year on coin cells. |
| SPI Clock Max | 8 MHz - supports fast readout of pressure/temperature registers and coefficient data without MCU timing bottlenecks. |
| Conversion Time | 1.6–3 ms - allows rapid sampling for dynamic altitude tracking in drones or sports trackers. |
| Operating Temp | –40 °C to +105 °C - ensures stable operation in automotive cabin modules and industrial enclosures. |
Pinout & Package
Package: LGA-8 (TSON8, SOT1769-1), 3.0 × 5.0 × 1.2 mm, RoHS-compliant surface-mount package with exposed cavity for pressure sensing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 2.375–5.5 V; powers internal regulator and sensor circuitry - requires local 1 μF ceramic decoupling. |
| CAP | Internal regulator output decoupling | Must connect 1 μF ceramic capacitor to GND; stabilizes internal bias voltage critical for ADC linearity. |
| GND | Ground reference | Common return path for analog and digital sections; must be low-impedance and isolated from noisy digital ground planes. |
| SHDN | Shutdown control input | Driven low to enter ≤1 μA shutdown; high-impedance SPI pins during sleep - enables ultra-low-power duty-cycling. |
| CS | Chip select | Active-low SPI enable; must be held low for entire command/data exchange - minimum pulse width 30 ns. |
| DOUT | SPI serial data output | 3-state output driven by device; carries register reads (e.g., 0x80 = pressure MSB); VOH ≥ VDD–0.4 V at 3 mA. |
| DIN | SPI serial data input | Accepts commands (e.g., 0x24 = start conversion); VIH ≥ 0.7VDD, VIL ≤ 0.3VDD - compatible with 3.3 V and 5 V MCUs. |
| SCLK | SPI clock input | Drives internal state machine; max 8 MHz; tCLKH/tCLKL ≥ 62.5 ns - supports standard SPI peripherals without custom timing. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-calibrated coefficients | Unique 16-bit a0/b1/b2 and 14-bit c12 stored in ROM - eliminates per-unit calibration effort and enables plug-and-play integration. |
| Host-based compensation | Raw 10-bit pressure/temperature ADC outputs plus coefficients allow full compensation in MCU firmware - avoids proprietary ASIC dependency. |
| Monotonic output | Guaranteed monotonicity across full pressure/temperature range - prevents software interpolation errors in closed-loop altitude control. |
| Low-power shutdown | ≤1 μA shutdown current with full register reset - simplifies power sequencing and enables wake-on-interrupt architectures. |
| Memory-mapped SPI interface | 6-bit address space (0x00–0x12) with dedicated CONVERT register (0x12) - enables intuitive register access without command parsing logic. |
Applications
| Barometric Weather Station | Portable Altimeter |
|---|---|
|
Use Scenario: Outdoor handheld or desktop unit measuring atmospheric pressure trends for short-term forecasting. IC Role / Device Role / Timing Role: Absolute pressure sensor providing calibrated kPa output via SPI to ARM Cortex-M host MCU. Use Value: ±1 kPa accuracy over –20 °C to +85 °C enables detection of <1 hPa pressure changes - sufficient for 8 m altitude resolution and storm front tracking. |
Use Scenario: Backpack-mounted or wrist-worn device calculating elevation gain/loss during hiking or skiing. IC Role / Device Role / Timing Role: Primary barometric pressure transducer feeding real-time altitude computation in embedded firmware. Use Value: 1.6–3 ms conversion time and 5 μA active current support 10 Hz sampling with sub-10-second battery runtime on CR2032. |
| Hard Disk Drive (HDD) Head Positioning | Industrial Air Control System |
|
Use Scenario: Closed-loop servo control of HDD actuator arms using ambient pressure feedback for thermal expansion compensation. IC Role / Device Role / Timing Role: Environmental pressure monitor interfaced to disk controller ASIC via SPI for adaptive head fly-height adjustment. Use Value: –40 °C to +105 °C operating range matches HDD enclosure thermal profile; LGA-8 footprint minimizes PCB area near drive motor. |
Use Scenario: HVAC or cleanroom air handling unit regulating differential pressure across filters and ducts. IC Role / Device Role / Timing Role: Reference absolute pressure sensor compensating gauge measurements against ambient drift. Use Value: Factory-trimmed coefficients eliminate field calibration labor; 50–115 kPa range covers global operating altitudes from below sea level to 1500 m. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar absolute pressure sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BMP280 | Integrated temperature-compensated pressure output (I²C/SPI); no host-side coefficient math required; 3.3 V only; ±0.12 hPa typical accuracy. | Reduces MCU firmware load but lacks programmable compensation flexibility; higher accuracy but narrower 30–110 kPa range. | Select BMP280 when prioritizing out-of-box accuracy and simplified driver integration over ultra-low power or wide voltage operation. |
| MS5611-01BA | Higher resolution (0.012 mbar), wider range (10–1200 kPa), I²C/SPI, but requires external 2.2 μF CAP and draws 10 μA active - no shutdown mode. | Better suited for underwater depth sensing or high-altitude UAVs; lacks SHDN pin, limiting battery-life optimization. | Select MS5611-01BA when extended pressure range or sub-meter altitude resolution is mandatory, and continuous operation is acceptable. |
Compared with BMP280 and MS5611-01BA, the MPL115A1T2 uniquely balances ultra-low active/shutdown current, wide 2.375–5.5 V supply, and host-flexible compensation - making it optimal for cost-sensitive, battery-powered barometers where firmware resources are constrained but power budget is critical.
Availability
MPL115A1T2 is available at Aetrix Electronics and suitable for barometric weather stations, portable altimeters, HDD head positioning systems, and industrial air control systems requiring stable component supply across long production lifecycles.
Supply support for MPL115A1T2 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The MPL115A1T2 belongs to NXP's miniature MEMS pressure sensor family, engineered specifically for low-cost, low-power barometric measurement in portable and embedded systems where size, accuracy, and energy efficiency are co-primary constraints.
FAQ
What is the primary function of the MPL115A1T2?
The MPL115A1T2 is an absolute pressure sensor IC that measures ambient atmospheric pressure from 50 kPa to 115 kPa and outputs digitized pressure and temperature values via SPI. It does not provide compensated pressure directly - instead, it supplies raw ADC readings and unique factory calibration coefficients so the host microcontroller can compute compensated absolute pressure using a documented polynomial algorithm. This architecture gives designers full control over compensation fidelity and update rate.
Does the MPL115A1T2 require external components for basic operation?
Yes, the MPL115A1T2 requires a 1 μF ceramic capacitor connected between the CAP pin and GND to stabilize its internal regulator - omission causes ADC nonlinearity and pressure reading drift. No external resistors or pull-ups are needed: CS, DIN, DOUT, and SCLK are internally biased. The SHDN pin may be tied to VDD for always-on operation or controlled by the host for power cycling. All other connections are direct to MCU GPIO or SPI peripheral pins.
How does the MPL115A1T2 achieve ±1 kPa accuracy without on-chip compensation?
The MPL115A1T2 achieves ±1 kPa accuracy over –20 °C to +85 °C through factory characterization and storage of four unique 16-bit calibration coefficients (a0, b1, b2, c12) in on-chip ROM. These coefficients model sensor offset, sensitivity, temperature-induced offset shift (TCO), and temperature-induced sensitivity shift (TCS). The host MCU applies them to raw 10-bit pressure and temperature ADC outputs using the documented second-order polynomial - shifting compensation complexity from silicon to firmware while preserving accuracy.
Can the MPL115A1T2 be used in automotive cabin applications?
Yes, the MPL115A1T2 is qualified for operation from –40 °C to +105 °C and features robust EMC performance per NXP's qualification testing. Its LGA-8 package is compatible with standard reflow profiles including SAC305 solder, and its 2.375–5.5 V supply range aligns with automotive 3.3 V and 5 V domains. However, it is not AEC-Q200 qualified - for safety-critical cabin pressure monitoring (e.g., airbag deployment triggers), consult NXP's automotive-grade alternatives such as the MPX5700 series.
What is the role of the SHDN pin on the MPL115A1T2?
The SHDN pin on the MPL115A1T2 is an active-low hardware shutdown control. When pulled low, the device enters a ≤1 μA standby state: internal regulators power down, ADC and sensor elements deactivate, and all SPI pins (CS, SCLK, DIN, DOUT) go high-impedance. Recovery requires pulling SHDN high and waiting up to 5 ms (tw) before issuing commands. This pin enables precise power gating in battery-operated systems - for example, waking the MPL115A1T2 only during scheduled pressure reads to extend multi-year sensor node lifetime.
MPL115A1T2 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 ~ 16.68PSI (50kPa ~ 115kPa)
- Output Type:
- SPI
- Output:
- 10 b
- Accuracy:
- ±0.145PSI (±1kPa)
- Voltage - Supply:
- 2.375V ~ 5.5V
- Port Size:
- -
- Port Style:
- No Port
- Features:
- Shutdown Mode, Standby Mode
- Termination Style:
- SMD (SMT) Tab
- Maximum Pressure:
- 145.04PSI (1000kPa)
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-LGA (5x3)
MPL115A1T2 FAQ
1.How can I place an order for MPL115A1T2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPL115A1T2 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 MPL115A1T2 reliable?
The price and inventory of MPL115A1T2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPL115A1T2 is usually 5 days.
3.What payment methods are accepted for MPL115A1T2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPL115A1T2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPL115A1T2?
MPL115A1T2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPL115A1T2 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 MPL115A1T2?
For technical support, including MPL115A1T2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPL115A1T2 requirements.
6.How does Aetrix verify that MPL115A1T2 is sourced from the original manufacturer or authorized distributors?
All MPL115A1T2 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 MPL115A1T2 meets industry standards.
7.What is the process for return or replacement of MPL115A1T2?
All MPL115A1T2 units undergo pre-shipment inspection (PSI). If there is an issue with MPL115A1T2, 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 MPL115A1T2 part is unused and in its original packaging.
Return procedure for MPL115A1T2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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