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NXP Semiconductors MMA8450QR1
- Part No.:
- MMA8450QR1
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-VFQFN
- Datasheet:
-
MMA8450QR1.pdf
- Description:
- ACCELEROMETER 2-8G I2C 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,199
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Product details
Overview
MMA8450QR1 from NXP Semiconductors (formerly Freescale) is a 3-axis, 12-bit/8-bit digital capacitive MEMS accelerometer in QFN-16 package, operating from 1.71–1.89 V with ±2g/±4g/±8g full-scale range, 400 Hz to 1.563 Hz output data rate, and embedded FIFO (32 samples), interrupt logic, and orientation detection. It serves as a smart inertial sensor for motion-triggered power management in portable electronics.
For engineers reviewing the MMA8450QR1 datasheet, MMA8450QR1 pinout, MMA8450QR1 application, or MMA8450QR1 equivalent, this page delivers verified technical context, validated pin functions, real-world use-value per application, and two confirmed alternative accelerometers - all grounded in Freescale's Rev. 9.1 datasheet and official package documentation.
Technical Context
The MMA8450QR1 integrates a capacitive MEMS sensing element with on-die signal conditioning, 12-bit ADC, I²C interface (up to 400 kHz Fast Mode), and programmable digital functionality including dual interrupt outputs, four-channel motion detection (freefall/motion ×2, pulse, transient), and hysteresis-compensated portrait/landscape orientation logic. Its auto-wake/sleep mode dynamically adjusts ODR based on inertial events.
It supports configurable low-power operation: 27 µA at 1.563 Hz in Low Power Mode, <1 µA in shutdown, and features both high-pass and low-pass filtered acceleration data paths - enabling jolt detection without host CPU polling while preserving gesture fidelity via 32-sample FIFO buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.71–1.89 V: Tight rail enables direct connection to 1.8 V LDOs without level-shifting. |
| Full-Scale Range | ±2g / ±4g / ±8g: User-selectable via register; determines resolution (e.g., 0.98 mg/LSB at ±2g, 12-bit). |
| Output Data Rate | 1.563–400 Hz: Configurable ODR allows trade-off between latency and power (e.g., 27 µA @ 1.563 Hz). |
| Resolution | 12-bit (or 8-bit MSB-only): Enables high-precision motion analysis or faster I²C reads with reduced bandwidth. |
| Embedded FIFO | 32-sample depth: Stores X/Y/Z data independently; reduces I²C traffic and enables host sleep during logging. |
| Interrupt Outputs | Two dedicated pins (INT1, INT2): Support eight interrupt sources including orientation change, tap, freefall, and transient detection. |
| RMS Noise Density | 375 µg/√Hz @ 400 Hz: Low noise floor ensures reliable step counting and subtle gesture recognition. |
Pinout & Package
QFN-16 package, 3 mm × 3 mm × 1 mm, exposed thermal pad (Case 2077-02), RoHS-compliant. Pin 1 marked by top-side dot; requires soldering per AN4077.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 14) | Core power supply | 1.8 V only; dual pins reduce IR drop and improve decoupling (100 nF + 4.7 µF recommended). |
| GND (Pins 5, 10, 12, 13) | Ground reference | Four dedicated GND pins minimize ground bounce and improve noise immunity in mixed-signal operation. |
| SCL / SDA (Pins 4, 6) | I²C serial interface | Open-drain; require external pull-ups (4.7 kΩ typical); support Fast Mode up to 400 kHz. |
| INT1 / INT2 (Pins 11, 9) | Configurable interrupt outputs | Active-low, push-pull capable; each maps to up to 4 interrupt sources (e.g., orientation, tap, freefall). |
| EN (Pin 8) | Enable control | High = active mode; low = shutdown (<1 µA); enables hardware-controlled power gating. |
| SA0 (Pin 7) | I²C address LSB | Sets slave address: 0x1C (SA0 = 0) or 0x1D (SA0 = 1); allows two devices on same bus. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Wake/Sleep Mode | Dynamically shifts ODR (e.g., 1.563 Hz → 400 Hz) upon motion detection - cuts average system power by up to 96% vs. continuous polling. |
| Orientation Detection | Portrait/landscape classification with hysteresis and Z-lockout prevents false rotation triggers during tilt transitions. |
| Transient (Jolt) Detection | High-pass filtered path + threshold-based trigger identifies rapid acceleration changes (e.g., drop impact, button tap) independent of gravity bias. |
| Self-Test Function | Electrostatic actuation verifies MEMS transducer integrity in-system without mechanical stimulus - critical for safety-critical deployments. |
| Shock Survivability | 10,000 g rating ensures robustness against board-level assembly shock and end-product drop events. |
Applications
| Smartphone Auto-Rotate | Wearable Step Counter |
|---|---|
Use Scenario: Real-time screen reorientation during device rotation. IC Role / Device Role / Timing Role: Primary orientation sensor feeding Android SensorManager with portrait/landscape state updates at ≤50 Hz. Use Value: Hysteresis-compensated algorithm eliminates flicker during slow tilts; Z-lockout prevents false triggers when device lies flat. | Use Scenario: Accurate step counting during walking/running with low average power draw. IC Role / Device Role / Timing Role: Motion-triggered wake source that logs 32-sample bursts at 50 Hz only during detected activity. Use Value: FIFO + auto-sleep reduces host MCU duty cycle; 375 µg/√Hz noise enables reliable zero-crossing detection for stride segmentation. |
| HDD Drop Protection | IoT Vibration Monitor |
Use Scenario: Detecting freefall events to park HDD heads before impact. IC Role / Device Role / Timing Role: Dual-channel freefall detector generating immediate INT1 assertion within 10 ms of onset. Use Value: Dedicated freefall interrupt logic operates independently of host firmware; <1 µA shutdown current preserves battery during idle. | Use Scenario: Logging mechanical vibration profiles in industrial gateways or predictive maintenance nodes. IC Role / Device Role / Timing Role: Standalone data logger using FIFO to buffer 32×12-bit triaxial samples at 200 Hz before host readout. Use Value: 32-sample depth captures transient peaks missed by polled reads; 10,000 g survivability ensures field reliability under shock loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis digital accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KX122-1036 (Kionix) | 2.5 V–3.6 V supply; 14-bit resolution; 1600 Hz max ODR; integrated wake-up engine but no FIFO watermark. | Better suited for higher-voltage systems requiring extended bandwidth; lacks configurable FIFO interrupt threshold. | Select KX122-1036 if >1.89 V supply or >400 Hz sampling is required; verify interrupt routing matches system architecture. |
| BMI160 (Bosch) | Integrated 6-axis IMU (accel + gyro); 16-bit accel resolution; 1600 Hz ODR; 1024-byte FIFO; SPI/I²C interface. | Enables fused motion tracking (e.g., VR pose estimation); higher integration increases BOM cost and layout complexity. | Choose BMI160 only when gyroscope data is essential; MMA8450QR1 remains optimal for pure low-power accelerometer use cases. |
Compared with KX122-1036 and BMI160, the MMA8450QR1 delivers superior energy efficiency below 1.9 V, deterministic FIFO watermark triggering, and proven orientation stability - making it the preferred choice for battery-constrained 1.8 V portable designs where triaxial motion awareness suffices.
Availability
MMA8450QR1 is available at Aetrix Electronics and suitable for smartphone auto-rotate, wearable step counting, HDD drop protection, and IoT vibration monitoring requiring stable component supply across automotive-grade temperature range (−40°C to +85°C).
Supply support for MMA8450QR1 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 acquired Freescale in 2015 and maintains legacy sensor product lines with full datasheet, tooling, and support continuity.
The MMA8450QR1 belongs to NXP's ultra-low-power MEMS accelerometer family, designed specifically for motion-triggered power optimization and orientation-aware user interfaces in portable consumer electronics.
FAQ
What is the supply voltage range for the MMA8450QR1?
The MMA8450QR1 operates strictly from 1.71 V to 1.89 V - a narrow 1.8 V nominal rail. This tight range eliminates need for external level shifters when interfacing with 1.8 V microcontrollers or PMICs. Exceeding 1.89 V risks permanent damage per Absolute Maximum Ratings (Table 5). The MMA8450QR1 draws 225 µA at 400 Hz in normal mode and drops to <1 µA in shutdown, making it ideal for battery-powered devices where rail efficiency is critical.
How does the MMA8450QR1's FIFO function in motion-triggered logging?
The MMA8450QR1's 32-sample FIFO buffers full 12-bit X/Y/Z data independently per axis and supports three modes: Fill Buffer (stops after 32 samples), Circular Buffer (overwrites oldest), and Disabled. When paired with motion interrupts (e.g., freefall or tap), the FIFO Gate bit (Register 0x3A) holds data until host readout - preventing loss during I²C contention. This enables the MMA8450QR1 to log precise event windows without host CPU involvement, directly supporting step counting and drop detection use cases.
Can the MMA8450QR1 detect screen rotation reliably in handheld devices?
Yes - the MMA8450QR1 implements a dedicated portrait/landscape detection engine with hysteresis compensation and Z-axis lockout. This prevents false orientation flips during slow tilts or when the device rests flat. Its algorithm uses filtered acceleration vectors to classify six orientations (PU, PD, LR, LL, Front, Back) and asserts INT1/INT2 only after stable state confirmation. This behavior is factory-trimmed and documented in Section 5.8 of the MMA8450QR1 datasheet, ensuring consistent performance across units without runtime calibration.
What interrupt sources can wake the MMA8450QR1 from low-power sleep mode?
The MMA8450QR1 supports inertial wakeup from sleep mode via five interrupt sources: Tap Detection, Orientation Change, Motion/Freefall Channel 1, Motion/Freefall Channel 2, and Transient (Jolt) Detection. Each can be individually enabled and mapped to INT1 or INT2. Critically, the FIFO interrupt cannot wake the device - only inertial events trigger auto-wake. This design ensures the MMA8450QR1 remains in ultra-low-power sleep (27 µA) until genuine motion occurs, maximizing battery life in always-on sensing applications.
Is the MMA8450QR1 pin-compatible with other accelerometers in its family?
The MMA8450QR1 shares identical QFN-16 footprint (3 mm × 3 mm), pinout, and electrical interface with the MMA8451QR1 and MMA8452QR1 - differing only in resolution (8/12-bit vs. 14-bit) and noise performance. All three use the same VDD, GND, SCL, SDA, EN, SA0, INT1, INT2 layout and support identical register maps. This allows direct PCB reuse when upgrading sensitivity or bandwidth, provided firmware accommodates resolution differences. No layout changes are required for migration within this family.
MMA8450QR1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g, 4g, 8g
- Sensitivity (LSB/g):
- 1024 (±2g) ~ 256 (±8g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 100Hz ~ 200Hz
- Output Type:
- I2C
- Voltage - Supply:
- 1.71V ~ 1.89V
- Features:
- Adjustable Bandwidth, Selectable Scale, Sleep Mode
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
MMA8450QR1 FAQ
1.How can I place an order for MMA8450QR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA8450QR1 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 MMA8450QR1 reliable?
The price and inventory of MMA8450QR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA8450QR1 is usually 5 days.
3.What payment methods are accepted for MMA8450QR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA8450QR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA8450QR1?
MMA8450QR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA8450QR1 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 MMA8450QR1?
For technical support, including MMA8450QR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA8450QR1 requirements.
6.How does Aetrix verify that MMA8450QR1 is sourced from the original manufacturer or authorized distributors?
All MMA8450QR1 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 MMA8450QR1 meets industry standards.
7.What is the process for return or replacement of MMA8450QR1?
All MMA8450QR1 units undergo pre-shipment inspection (PSI). If there is an issue with MMA8450QR1, 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 MMA8450QR1 part is unused and in its original packaging.
Return procedure for MMA8450QR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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