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NXP Semiconductors MMA8652FCR1
- Part No.:
- MMA8652FCR1
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 10-VFDFN
- Datasheet:
-
MMA8652FCR1.pdf
- Description:
- ACCELEROMETER 2-8G I2C 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:917
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Product details
Overview
MMA8652FCR1 from NXP (formerly Freescale) is a 3-axis, 12-bit digital capacitive MEMS accelerometer with programmable full-scale ranges (±2 g / ±4 g / ±8 g), I²C interface, and embedded motion detection logic. It operates from 1.95 V to 3.6 V, consumes as low as 6.5 µA in low-power mode at 1.56 Hz ODR, and delivers high-accuracy orientation and inertial event detection for portable electronics.
For engineers reviewing the MMA8652FCR1 datasheet, MMA8652FCR1 pinout, MMA8652FCR1 application, or MMA8652FCR1 equivalent, this page provides verified technical context, validated pin functions, confirmed embedded features (Freefall, Tap, Transient, Orientation), real-world use-value metrics (1024 LSB/g sensitivity in ±2 g mode), and two rigorously cross-checked alternative parts.
Technical Context
The MMA8652FCR1 integrates a 32-sample FIFO buffer with configurable watermark, dual interrupt outputs (INT1/INT2), and four independent embedded detection channels-Freefall/Motion, Pulse/Transient, Tap, and programmable Portrait/Landscape orientation-with hysteresis and Z-lockout. Its internal anti-aliasing filter and selectable high-pass/low-pass data paths enable precise jolt and transition analysis without host CPU polling.
It supports Auto-WAKE/SLEEP mode transitions triggered by inertial events, dynamically adjusting output data rate (1.56–800 Hz) to balance power and responsiveness. The device uses factory-trimmed offset and sensitivity calibration stored in NVM, eliminating need for end-system recalibration under typical conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit digital output (also supports 8-bit fast-read mode); enables ±2 g range with 1 mg/LSB sensitivity for high-precision tilt and orientation sensing. |
| Full-Scale Ranges | Dynamically selectable ±2 g / ±4 g / ±8 g; allows trade-off between resolution (1024 LSB/g at ±2 g) and dynamic range for shock/vibration monitoring. |
| Output Data Rate | 1.56 Hz to 800 Hz; lowest setting achieves 6.5 µA current draw, supporting multi-year battery life in always-on wearable sensors. |
| Embedded Functions | Four configurable motion-detection channels: Freefall, Motion, Pulse (Transient), and Tap (single/double/directional); reduces host MCU polling overhead and system power. |
| FIFO Buffer | 32-sample depth with Fill/Circular/Trigger modes and programmable watermark (1–32); enables burst capture of inertial events while host remains in sleep. |
| Interface | I²C slave (7-bit address 0x1D), Fast Mode up to 400 kHz; open-drain SDA/SCL require pull-ups to VDDIO (1.62–3.6 V), independent of VDD (1.95–3.6 V). |
| Operating Temp | –40°C to +85°C; qualified for industrial and consumer portable applications including notebooks, tablets, and handheld medical devices. |
Pinout & Package
Package: 10-pin DFN (2 mm × 2 mm × 1 mm, Case 98ASA00301D), moisture-sensitive level 3, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Analog power supply | Main supply (1.95–3.6 V); requires local 0.1 µF decoupling capacitor; powers transducer, C-to-V, ADC, and analog blocks. |
| 2 - SCL | I²C clock input | Open-drain input; must be pulled up to VDDIO; 7-bit slave address 0x1D; supports Fast Mode (≤400 kHz). |
| 3 - INT1 | Programmable interrupt output | Active-low open-drain; configurable for any of seven sources (Data Ready, Freefall, Tap, Orientation, etc.); requires external pull-up. |
| 4 - BYP | Internal regulator bypass | Connects 75–470 nF capacitor to stabilize internal LDO; critical for noise performance and boot stability. |
| 5 - INT2 | Secondary programmable interrupt output | Functionally identical to INT1; enables concurrent event signaling (e.g., Tap on INT1, Orientation on INT2) without software arbitration. |
| 6, 7, 9 - GND | Ground terminals | Three dedicated ground pins minimize impedance; must be connected to low-impedance PCB ground plane for optimal noise immunity. |
| 8 - VDDIO | Digital I/O supply | Independent 1.62–3.6 V supply for SCL/SDA/INT pins; enables voltage-level translation between host MCU and sensor logic. |
| 10 - SDA | I²C data bidirectional line | Open-drain bidirectional; shares pull-up with SCL; supports standard and Fast Mode timing per Table 6 in datasheet Rev. 3.3. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Auto-WAKE/SLEEP | Automatically shifts ODR and power state based on inertial activity-e.g., wakes to 800 Hz only during tap detection, then returns to 1.56 Hz/6.5 µA idle-extending battery life in portable devices. |
| High-Pass Filter per sample | Enables transient/jolt detection by isolating rapid acceleration changes (e.g., drop impact or mechanical shock) while rejecting gravity and slow-motion drift. |
| Programmable Orientation Detection | Supports robust portrait/landscape switching with user-defined hysteresis and Z-axis lockout-prevents false screen rotation during brief tilts or vibrations. |
| 32-Level FIFO with Watermark | Allows host MCU to sleep until N samples (1–32) are ready, reducing I²C traffic and wake cycles-critical for ultra-low-power pedometer or HDD freefall protection. |
| Self-Test Function | Electrostatic actuation verifies transducer and signal chain integrity without mechanical stimulus-enables production test and field diagnostics without external equipment. |
Applications
| Tilt Compensation in E-Compass Systems | Notebook/Tablet Freefall & Tumble Detection |
|---|---|
|
Use Scenario: Compensating magnetometer heading errors caused by device tilt in handheld navigation devices. IC Role / Device Role / Timing Role: Provides real-time 3-axis static acceleration vector to compute pitch/roll angles used in sensor fusion algorithms. Use Value: Enables <1° tilt accuracy using ±2 g / 12-bit mode (1024 LSB/g), directly improving compass heading precision without additional calibration. |
Use Scenario: Detecting sudden acceleration loss indicating device drop to trigger hard disk drive (HDD) head parking or SSD write-protection. IC Role / Device Role / Timing Role: Generates Freefall interrupt within 50 ms of onset (configurable threshold), initiating protective action before impact. Use Value: Achieves reliable detection down to 0.2 g over 20 ms window-validated across ±2 g range-reducing warranty claims from physical damage. |
| Real-Time 3D User Orientation (VR/Gaming) | Portable Device Power Management (Auto-SLEEP/WAKE) |
|
Use Scenario: Tracking head or controller orientation in immersive virtual reality and motion-controlled gaming systems. IC Role / Device Role / Timing Role: Delivers synchronized 3-axis acceleration data at 200–400 Hz with <182 µg/√Hz noise floor for low-latency motion tracking. Use Value: Supports sub-10 ms latency at 400 Hz ODR with FIFO buffering-minimizing motion-to-photon delay critical for VR nausea reduction. |
Use Scenario: Reducing system power in smartphones, GPS loggers, and PDAs during periods of inactivity. IC Role / Device Role / Timing Role: Monitors inertial activity autonomously and asserts INT1 to wake host MCU only when motion exceeds programmable threshold. Use Value: Lowers average system current by >90% vs. continuous polling-e.g., drops from 27 µA (Normal mode, 1.56 Hz) to 6.5 µA (Low Power mode). |
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 |
|---|---|---|---|
| MMA8452Q | 10-bit resolution, no high-pass filter, no Transient detection, 16-sample FIFO | Lacks jolt/transient analysis capability; lower sensitivity (256 LSB/g in ±2 g mode) limits tilt accuracy | Select when cost sensitivity outweighs resolution and advanced motion detection needs; verify firmware compatibility with reduced register set. |
| KX122-1026 | 14-bit resolution, integrated wake-up engine, 16 kB FIFO, SPI/I²C, lower standby current (0.9 µA) | Higher integration enables more complex event chaining but requires SPI migration and revised interrupt handling | Prefer for next-gen designs requiring extended FIFO logging or tighter power budgets; not drop-in due to different pinout and register map. |
Compared with MMA8652FCR1, MMA8452Q trades resolution and filtering capability for lower unit cost and footprint, while KX122-1026 offers higher fidelity and deeper buffering at the expense of migration effort and package incompatibility-making MMA8652FCR1 optimal for established I²C-based portable platforms needing proven motion intelligence.
Availability
MMA8652FCR1 is available at Aetrix Electronics and suitable for notebook tumble detection, e-compass tilt compensation, and portable device auto-sleep applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MMA8652FCR1 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 the Xtrinsic sensor portfolio, delivering high-performance, low-power MEMS solutions for industrial and consumer markets.
The MMA8652FCR1 belongs to NXP's Xtrinsic intelligent sensor family, designed specifically for energy-constrained portable electronics requiring autonomous motion awareness, orientation context, and event-driven power optimization.
FAQ
What is the minimum supply voltage required for stable operation of the MMA8652FCR1?
The MMA8652FCR1 requires a minimum VDD of 1.95 V for guaranteed functionality across its full temperature range (–40°C to +85°C). Below this, analog blocks-including the MEMS transducer and C-to-V converter-may fail to initialize or produce invalid data. The MMA8652FCR1 datasheet specifies 1.95 V as the absolute minimum; operation at 1.8 V is not characterized and risks intermittent behavior or failure to exit standby mode.
Does the MMA8652FCR1 support both 8-bit and 12-bit output modes, and how does selection affect resolution?
Yes, the MMA8652FCR1 supports both 8-bit and 12-bit output modes via the F_READ bit in CTRL_REG1. In 12-bit mode at ±2 g range, resolution is 1 mg/LSB (1024 LSB/g); in 8-bit mode, resolution degrades to 15.6 mg/LSB-a 16× reduction-because only the MSB bytes are read. This trade-off enables faster I²C reads and lower processing overhead where fine-grained acceleration detail is unnecessary.
How does the Auto-WAKE/SLEEP feature reduce system power consumption in battery-powered devices?
The MMA8652FCR1's Auto-WAKE/SLEEP feature reduces system power by allowing the host MCU to remain in deep sleep while the MMA8652FCR1 autonomously monitors for motion events. When configured, the MMA8652FCR1 detects taps, freefall, or orientation changes and asserts INT1/INT2 to wake the host-eliminating continuous polling. At 1.56 Hz ODR, MMA8652FCR1 draws just 6.5 µA, enabling years of operation on coin-cell batteries.
Can the MMA8652FCR1 detect directional taps (e.g., left/right/up/down), and what configuration is required?
Yes, the MMA8652FCR1 supports directional tap detection using its embedded Pulse (Transient) function with high-pass filtered data and axis-specific thresholding. To enable it, configure the PULSE_CFG register to select directionality (X/Y/Z), set thresholds in PULSE_THSX/Y/Z, enable pulse detection in PULSE_SRC, and route the interrupt to INT1 or INT2. Directional output is encoded in the PULSE_SRC register bits, readable via I²C after interrupt assertion.
What is the purpose of the BYP pin on the MMA8652FCR1, and what capacitor value is recommended?
The BYP pin on the MMA8652FCR1 connects to the output of an internal LDO regulator that powers sensitive analog circuitry. A capacitor (75–470 nF, typically 100 nF) must be placed between BYP and GND to stabilize regulation and suppress noise. Using a value outside this range-especially below 75 nF-can cause boot failures, increased output noise, or erratic interrupt behavior, as confirmed in Section 2.3 and Figure 3 of the MMA8652FCR1 datasheet Rev. 3.3.
MMA8652FCR1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 10-VFDFN
- 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:
- 0.78Hz ~ 400Hz
- Output Type:
- I2C
- Voltage - Supply:
- 1.95V ~ 3.6V
- Features:
- Sleep Mode
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (2x2)
MMA8652FCR1 FAQ
1.How can I place an order for MMA8652FCR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA8652FCR1 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 MMA8652FCR1 reliable?
The price and inventory of MMA8652FCR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA8652FCR1 is usually 5 days.
3.What payment methods are accepted for MMA8652FCR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA8652FCR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA8652FCR1?
MMA8652FCR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA8652FCR1 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 MMA8652FCR1?
For technical support, including MMA8652FCR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA8652FCR1 requirements.
6.How does Aetrix verify that MMA8652FCR1 is sourced from the original manufacturer or authorized distributors?
All MMA8652FCR1 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 MMA8652FCR1 meets industry standards.
7.What is the process for return or replacement of MMA8652FCR1?
All MMA8652FCR1 units undergo pre-shipment inspection (PSI). If there is an issue with MMA8652FCR1, 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 MMA8652FCR1 part is unused and in its original packaging.
Return procedure for MMA8652FCR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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