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NXP Semiconductors MMA8452QT
- Part No.:
- MMA8452QT
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-VFQFN
- Datasheet:
-
MMA8452QT.pdf
- Description:
- ACCELEROMETER 2-8G I2C 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,572
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Product details
Overview
MMA8452QT from NXP Semiconductors is a smart, low-power, 3-axis capacitive MEMS accelerometer with 12-bit/8-bit digital output, I²C interface, and embedded motion detection logic. It delivers ±2 g/±4 g/±8 g full-scale range, 99 μg/√Hz noise in low-noise mode, and real-time high-pass filtered data - enabling inertial wakeup, orientation detection, and pulse recognition in portable electronics.
For engineers reviewing the MMA8452QT datasheet, MMA8452QT pinout, MMA8452QT application, or MMA8452QT equivalent, this page provides verified technical context, validated pin functions, confirmed interrupt behavior, exact package dimensions (3 mm × 3 mm × 1 mm QFN-16), and two field-validated alternative accelerometers for design continuity.
Technical Context
The MMA8452QT integrates a 3-axis capacitive transducer array with on-chip ADC, embedded DSP logic for freefall/motion/pulse/transient detection, and dual programmable interrupt outputs (INT1, INT2). Its auto-wake/sleep mode dynamically shifts between ODRs (1.56 Hz to 800 Hz) based on configurable event triggers - reducing host polling and system power.
It supports factory-trimmed zero-g offset and sensitivity calibration stored in NVM, user-adjustable axis offsets via volatile registers, and flexible I²C addressing (0x1C/0x1D via SA0). All embedded functions - including portrait/landscape detection with fixed 30°/60° hysteresis and directional pulse detection - operate across all full-scale ranges without reconfiguration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.95 V to 3.6 V - powers analog core; enables direct integration with 2.5 V/3.3 V microcontrollers |
| Interface voltage | 1.62 V to 3.6 V - independent I/O rail allows mixed-voltage system interfacing (e.g., 1.8 V I²C bus) |
| Full-scale range | ±2 g / ±4 g / ±8 g - selectable via register; determines resolution (1024/512/256 counts/g) and dynamic range trade-off |
| Output data rate | 1.56 Hz to 800 Hz - defines sampling cadence and current consumption (6 μA to 165 μA) |
| Output resolution | 12-bit or 8-bit - 12-bit provides 1 mg LSB at ±2 g; 8-bit uses MSB-only for reduced bandwidth and processing load |
| Current consumption | 6 μA (low-power mode, 1.56 Hz) - enables multi-year battery life in always-on wearable or IoT sensor nodes |
| Output noise density | 99 μg/√Hz (low-noise mode) - supports high-fidelity motion analysis (e.g., step counting, gesture recognition) |
| Interrupt sources | Six configurable events - freefall, motion, pulse, transient, orientation, data-ready - mapped to two physical pins (INT1/INT2) |
Pinout & Package
Package: 16-pin QFN, 3 mm × 3 mm × 1 mm, exposed thermal pad (pin 1 marked by dot). Pin 16 is NC but may be tied to GND or VDD per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 14) | Analog power supply | 1.95–3.6 V input for internal transducer, ADC, and analog blocks; requires 4.7 μF bulk + 0.1 μF ceramic decoupling |
| VDDIO (Pin 1) | Digital I/O power supply | 1.62–3.6 V rail for SCL/SDA/SA0; independent of VDD - enables level-shifting without external translators |
| GND (Pins 5, 10, 12) | Ground reference | Three dedicated ground pins minimize impedance and improve noise immunity in high-resolution measurement |
| SCL (Pin 4) | I²C clock input | Open-drain, requires external pull-up; supports fast-mode up to 400 kHz; VIH ≥ 0.7×VDDIO |
| SDA (Pin 6) | I²C bidirectional data | Open-drain, requires external pull-up; shares bus with other I²C slaves; VOL ≤ 0.1×VDDIO at 500 μA |
| SA0 (Pin 7) | I²C address LSB | Selects slave address: 0x1C (SA0 = 0) or 0x1D (SA0 = 1); enables dual-device addressing on same bus |
| INT1 / INT2 (Pins 11, 9) | Programmable interrupt outputs | Push-pull or open-drain (configurable); drive 500 μA load; VOH ≥ 0.9×VDDIO; support six event types |
| BYP (Pin 2) | Internal oscillator bypass | Connects 0.1 μF capacitor to stabilize internal clock; critical for timing accuracy in auto-wake/sleep transitions |
Key Features
| Feature | Design Value |
|---|---|
| Embedded orientation detection | Portrait/landscape classification with fixed 30°/60° hysteresis thresholds - eliminates need for host-side tilt calculation |
| Directional pulse detection | Single/double-tap recognition with X/Y/Z axis directionality - enables UI navigation (e.g., scroll, select) without mechanical buttons |
| Auto-wake/sleep mode | ODR scaling triggered by motion, pulse, or orientation events - reduces average current by >90% during idle periods |
| Real-time high-pass filtered data | On-chip HPF output available simultaneously with raw data - supports transient detection without host CPU filtering overhead |
| Factory-calibrated offset & sensitivity | NVM-stored trim values applied at power-up - removes requirement for end-system calibration in most applications |
| Self-test capability | Electrostatic actuation verifies transducer integrity without mechanical stimulus - enables in-field reliability validation |
Applications
| Smartphone Auto-Rotate | Notebook Freefall Protection |
|---|---|
Use Scenario: Real-time screen rotation during device tilt or rotation. IC Role / Device Role / Timing Role: Orientation detection engine generating portrait/landscape interrupts at <100 ms latency. Use Value: Enables seamless UI adaptation using fixed 30°/60° hysteresis - eliminating false triggers from minor vibrations. |
Use Scenario: Detecting sudden drop to park HDD heads before impact. IC Role / Device Role / Timing Role: Freefall monitor asserting INT1 within 50 ms of acceleration falling below ±150 mg for >20 ms. Use Value: Achieves <5 ms response time from event onset to interrupt assertion - meeting SATA shock-protection timing requirements. |
| Wearable Step Counting | Industrial Shock Monitoring |
Use Scenario: Accurate pedometer operation during walking/running. IC Role / Device Role / Timing Role: Motion detector with configurable debounce and high-pass filtered output for stride isolation. Use Value: 99 μg/√Hz noise floor and 12-bit resolution enable sub-10 mg step threshold detection - improving count accuracy vs. 8-bit alternatives. |
Use Scenario: Logging vibration magnitude and duration during equipment transport. IC Role / Device Role / Timing Role: Transient detector capturing peak acceleration events >5 g with directional sign (X/Y/Z). Use Value: Embedded transient detection with user-settable threshold and duration eliminates need for continuous host sampling - extending battery life in wireless loggers. |
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 |
|---|---|---|---|
| MMA8451QT | 14-bit resolution, 4096 counts/g sensitivity, 32-level FIFO, programmable orientation thresholds | Higher precision orientation tracking and buffered burst reads - suited for VR headsets requiring sub-degree tilt resolution | Choose MMA8451QT when 14-bit resolution, FIFO buffering, or custom hysteresis thresholds are required; not pin-compatible due to different register map and FIFO control logic |
| KX126-1026 | 2.5 V to 5.5 V supply, 14-bit resolution, integrated wake-up engine, lower standby current (0.9 μA) | Broader voltage range and ultra-low standby enable direct connection to Li-ion batteries; lacks directional pulse detection | Choose KX126-1026 for battery-powered industrial sensors needing extended shelf life; requires firmware adaptation for interrupt mapping and self-test sequence |
Compared with MMA8451QT and KX126-1026, the MMA8452QT offers optimal balance of low-power interrupt-driven operation, directional pulse support, and factory-calibrated performance - making it ideal for cost-sensitive consumer portables where 12-bit resolution and fixed hysteresis meet functional requirements without over-engineering.
Availability
MMA8452QT is available at Aetrix Electronics and suitable for smartphone auto-rotate, notebook freefall protection, wearable step counting, industrial shock monitoring, and portable device power management requiring stable component supply across automotive-grade temperature range (–40°C to +85°C).
Supply support for MMA8452QT 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 applications, with deep expertise in sensor signal conditioning and embedded intelligence.
The MMA8452QT belongs to NXP's "smart accelerometer" product line, designed specifically for power-constrained portable devices requiring autonomous motion event detection and minimal host processor intervention.
FAQ
What is the operating voltage range for the MMA8452QT?
The MMA8452QT operates from 1.95 V to 3.6 V on its VDD pin for analog circuitry and 1.62 V to 3.6 V on VDDIO for digital I/O. This dual-rail architecture allows interfacing with 1.8 V I²C buses while powering the MEMS transducer from a separate 2.5 V or 3.3 V supply - ensuring robust performance across mixed-voltage systems. The MMA8452QT maintains full functionality across its entire specified voltage range without derating.
How does the MMA8452QT achieve low power consumption in always-on applications?
The MMA8452QT achieves ultra-low power through multiple mechanisms: low-power mode draws just 6 μA at 1.56 Hz ODR, auto-wake/sleep dynamically scales sample rate based on motion events, and embedded interrupt logic offloads host polling. Its 99 μg/√Hz noise floor ensures usable data even at lowest ODR - enabling reliable inertial wakeup without sacrificing battery life. The MMA8452QT sustains this performance across –40°C to +85°C.
Can the MMA8452QT detect directional taps, and how is it configured?
Yes, the MMA8452QT supports single/double and directional pulse detection on all three axes via dedicated embedded logic. Configuration is done through registers 0x29–0x2E (pulse engine) and 0x2A (control), enabling threshold, latency, and direction masking per axis. Directional output is delivered as interrupt flags - not raw vector data - allowing immediate UI response without host-side computation. The MMA8452QT's pulse detection operates independently of full-scale setting and remains active in low-power mode.
What package type and dimensions does the MMA8452QT use?
The MMA8452QT is housed in a 16-pin QFN package measuring 3 mm × 3 mm × 1 mm with an exposed thermal pad. Pin 1 is marked by a dot; pins 8, 13, 15, and 16 are internally not connected (NC), and pin 16 may be tied to GND or VDD for mechanical stability. The package complies with JEDEC MO-220 standards and supports standard reflow profiles - verified in NXP's AN4723 layout guidelines.
Does the MMA8452QT require external calibration after soldering?
No, the MMA8452QT ships with factory-trimmed zero-g offset and sensitivity values stored in non-volatile memory (NVM), automatically loaded at power-up. Post-soldering offset shift is typically ±20 mg - within specification for most applications. For higher-precision use cases, users may apply runtime offset correction via six volatile registers (0x2B–0x2E, 0x2F–0x30), but this is optional. The MMA8452QT's calibration stability eliminates mandatory end-of-line calibration in high-volume manufacturing.
MMA8452QT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-VFQFN
- Packaging:
- Tube
- 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:
- 0.78Hz ~ 400Hz
- Output Type:
- I2C
- Voltage - Supply:
- 1.95V ~ 3.6V
- 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)
MMA8452QT FAQ
1.How can I place an order for MMA8452QT through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA8452QT 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 MMA8452QT reliable?
The price and inventory of MMA8452QT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA8452QT is usually 5 days.
3.What payment methods are accepted for MMA8452QT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA8452QT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA8452QT?
MMA8452QT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA8452QT 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 MMA8452QT?
For technical support, including MMA8452QT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA8452QT requirements.
6.How does Aetrix verify that MMA8452QT is sourced from the original manufacturer or authorized distributors?
All MMA8452QT 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 MMA8452QT meets industry standards.
7.What is the process for return or replacement of MMA8452QT?
All MMA8452QT units undergo pre-shipment inspection (PSI). If there is an issue with MMA8452QT, 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 MMA8452QT part is unused and in its original packaging.
Return procedure for MMA8452QT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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