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NXP Semiconductors MMA7456LR1
- Part No.:
- MMA7456LR1
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 14-TFLGA
- Datasheet:
-
MMA7456LR1.pdf
- Description:
- ACCELEROMETER 2-8G I2C/SPI 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
MMA7456LR1 from Freescale Semiconductor is a 3-axis ±2g/±4g/±8g digital output capacitive MEMS accelerometer with I²C/SPI interface, factory-calibrated 0g offset and sensitivity, integrated low-pass filter, temperature compensation, self-test (Z-axis), and programmable interrupt outputs (INT1/DRDY and INT2) for motion detection in handheld battery-powered devices.
For engineers reviewing the MMA7456LR1 datasheet, MMA7456LR1 pinout, MMA7456LR1 application, or MMA7456LR1 equivalent, this page delivers verified technical context on g-select range configuration, pulse/level detection thresholds, standby current (2.5 µA), 10-bit/8-bit output modes, and LGA-14 package integration - critical for freefall detection, pedometer design, and motion-triggered UI functions.
Technical Context
The MMA7456LR1 implements a surface-micromachined polysilicon g-cell with switched-capacitor ASIC signal conditioning, delivering digitized acceleration data via configurable 8-bit or 10-bit output formats. Its internal architecture supports independent axis selection for level detection (OR logic) or freefall detection (AND logic) using registers $18 and $19.
Interrupt generation is decoupled from measurement bandwidth: while data output rates are 125 Hz (62.5 Hz BW) or 250 Hz (125 Hz BW), level/pulse interrupt detection operates at a fixed 600 Hz bandwidth. Pulse detection supports single/double pulse recognition with user-programmable latency time ($1D), pulse duration ($1C), and time window ($1E).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4 V – 3.6 V analog (AVDD) and digital (DVDD_IO); enables direct connection to 2.8 V or 3.3 V system rails without level-shifting. |
| Operating Current | 400–490 µA in operation mode; 2.5 µA typical in standby - critical for battery life in portable electronics. |
| Output Resolution | 8-bit (±2g/±4g/±8g selectable) or 10-bit (±8g only); provides 64 LSB/g sensitivity at 2g and 8g ranges for consistent scaling. |
| Detection Bandwidth | 62.5 Hz or 125 Hz user-selectable for measurement; 600 Hz fixed for interrupt generation - ensures fast response to shocks while filtering noise. |
| Self-Test Output | Z-axis deflection calibrated to 1g (ΔSTZ = 32–83 counts in 10-bit mode); validates mechanical integrity and signal chain pre-deployment. |
| Shock Survivability | 5,000 g maximum acceleration rating; withstands drop testing (1.8 m) and mechanical stress in consumer device handling. |
| Temperature Drift | Offset drift ±3.5 mg/°C (TCO); sensitivity drift ±0.026 %/°C (TCS) - enables stable performance across –40°C to +85°C industrial range. |
Pinout & Package
Package: 3 mm × 5 mm × 1 mm LGA-14 (Case 1977-01), bottom-terminal land grid array requiring controlled solder paste volume and stencil design per Freescale guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DVDD_IO | Digital I/O power supply; must be decoupled locally to reduce noise coupling into SPI/I²C interface. |
| 2, 5 | GND | Analog and digital ground pins; require low-impedance PCB connection to minimize offset error and crosstalk. |
| 4 | IADDR0 | I²C address bit 0 (optional, factory-programmed); enables multi-device I²C bus configuration when activated. |
| 6 | AVDD | Analog supply input; separate from DVDD_IO to isolate noise-sensitive sensing circuitry from digital switching. |
| 7 | CS | SPI chip select (active-low) / I²C enable (active-high); dual-function control pin for interface selection. |
| 8 | INT1/DRDY | Configurable interrupt/data-ready output; signals new sample availability or user-defined event (motion, freefall, pulse). |
| 9 | INT2 | Dedicated secondary interrupt output; supports independent event triggering (e.g., Z-axis freefall vs. X/Y motion). |
| 12 | SDO | SPI serial data output (3-wire or 4-wire mode); open-drain capable for shared bus configurations. |
| 13 | SDA/SDI/SDO | Multi-function pin: I²C SDA, SPI SDI, or 3-wire SDO - requires mode-dependent pull-up/pull-down configuration. |
| 14 | SCL/SPC | I²C clock / SPI serial clock input; supports up to 8 MHz SPI clock when DVDD_IO > 2.4 V. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable g-range selection | Runtime-switchable ±2g/±4g/±8g via GLVL[1:0] bits in Mode Control Register ($16), enabling adaptive sensitivity for varying motion profiles. |
| Two-stage interrupt architecture | Separate INT1/DRDY and INT2 outputs with independent register-controlled event assignment (e.g., INT1 = freefall, INT2 = double-pulse). |
| User-offset calibration | Adjustable 0g offset via dedicated 16-bit registers ($10–$15) per axis - compensates for mounting tilt or board-level thermal drift. |
| Pulse detection engine | Hardware-accelerated single/double pulse recognition with programmable latency ($1D), duration ($1C), and time window ($1E) - eliminates MCU polling overhead. |
| Robust ESD protection | Internal 2000 V HBM ESD structure on all pins; validated per JEDEC JS-001, reducing need for external TVS in compact layouts. |
Applications
| Hard Disk Drive Freefall Protection | Laptop Anti-Theft Activation |
|---|---|
|
Use Scenario: Detects sudden vertical acceleration loss during laptop drop to park HDD heads before impact. IC Role / Device Role / Timing Role: MMA7456LR1 acts as real-time freefall sensor with AND-condition logic across X/Y/Z axes and <12 ms latency. Use Value: Prevents head crash damage by triggering head retraction within 12 ms of freefall onset - meeting ATA-7 specification requirements. |
Use Scenario: Triggers alarm or data wipe when unauthorized movement exceeds threshold after system lock. IC Role / Device Role / Timing Role: MMA7456LR1 monitors sustained motion (>500 ms) using level-detection mode with programmable threshold. Use Value: Enables tamper-responsive security without continuous CPU wake-ups - leveraging 2.5 µA standby current for battery longevity. |
| Smartphone Tap-to-Mute Gesture | Pedometer Step Counting |
|
Use Scenario: Recognizes sharp vertical tap on phone body to mute calls or alerts. IC Role / Device Role / Timing Role: MMA7456LR1 performs single-pulse detection on Z-axis with <15 ms pulse duration and <100 ms latency window. Use Value: Delivers sub-100 ms gesture response time using hardware pulse engine - eliminating software-based FFT processing latency. |
Use Scenario: Counts walking steps by detecting periodic vertical acceleration peaks during gait cycle. IC Role / Device Role / Timing Role: MMA7456LR1 operates in ±2g range with 125 Hz ODR and 62.5 Hz low-pass filter to reject arm-swing noise. Use Value: Achieves >95% step detection accuracy at 1.2–1.8 Hz stride frequency using calibrated 64 LSB/g sensitivity and onboard temperature compensation. |
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 |
|---|---|---|---|
| KXSS5-2050 | 2.5 V–3.6 V supply; 256 LSB/g @ ±2g; built-in FIFO; no self-test; 1.5 µA standby current. | Lacks Z-axis self-test and pulse detection engine; optimized for ultra-low-power always-on monitoring rather than event-triggered response. | Select KXSS5-2050 only if FIFO buffering and sub-2 µA standby outweigh need for hardware pulse recognition and mechanical validation. |
| ADXL345 | 1.7 V–3.6 V supply; 4 mg/LSB @ ±2g; 13-bit resolution; integrated tap/double-tap engine; 0.1 µA standby. | Includes dedicated tap/double-tap hardware but lacks freefall AND-condition logic and 600 Hz interrupt bandwidth. | Choose ADXL345 when tap gesture reliability is primary; avoid for HDD freefall where MMA7456LR1's AND-condition detection and 5,000 g ruggedness are required. |
Compared with KXSS5-2050 and ADXL345, the MMA7456LR1 uniquely combines Z-axis self-test, programmable 600 Hz interrupt bandwidth, AND-condition freefall logic, and 5,000 g shock survivability - making it the only option qualified for industrial-grade HDD protection and motion-critical embedded systems.
Availability
MMA7456LR1 is available at Aetrix Electronics and suitable for handheld consumer electronics, laptop anti-theft systems, and HDD freefall protection requiring stable component supply across extended production lifecycles.
Supply support for MMA7456LR1 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
Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in embedded processing, sensors, and analog solutions for automotive, industrial, and consumer markets.
The MMA7456LR1 belongs to Freescale's low-g MEMS accelerometer product line, designed specifically for motion-aware portable electronics requiring robust shock tolerance, ultra-low standby power, and hardware-accelerated event detection.
FAQ
What communication interfaces does the MMA7456LR1 support?
The MMA7456LR1 supports both I²C and SPI interfaces. I²C uses pins SDA/SDI/SDO (13) and SCL/SPC (14), with optional I²C address bit IADDR0 (4). SPI operates in 3-wire or 4-wire mode using CS (7), SDO (12), SDA/SDI/SDO (13), and SCL/SPC (14). Interface selection is determined by CS pin state and register configuration - no hardware modification is needed to switch protocols.
How does the MMA7456LR1 achieve freefall detection?
The MMA7456LR1 achieves freefall detection using AND-condition logic across all three axes, implemented in Control Register $19. When X, Y, and Z acceleration values simultaneously fall below a user-defined threshold for longer than the latency time ($1D), INT2 asserts. This hardware-based approach ensures deterministic <12 ms response - critical for HDD head parking before impact.
Can the MMA7456LR1's 0g offset be recalibrated in-system?
Yes, the MMA7456LR1 supports in-system 0g offset calibration via dedicated 16-bit registers ($10–$15) for each axis. Users write correction values to these registers to compensate for mounting misalignment or thermal drift. Factory-set offset remains intact unless overwritten, preserving baseline accuracy during field calibration.
What is the significance of the 600 Hz interrupt bandwidth in the MMA7456LR1?
The 600 Hz interrupt bandwidth is fixed and independent of the 62.5/125 Hz measurement bandwidth. It enables rapid detection of transient events like taps or shocks while the main data path filters noise. This separation ensures reliable pulse detection without compromising low-noise measurement stability - a key differentiator for motion-triggered UI and safety-critical applications.
Is the MMA7456LR1 RoHS compliant and qualified for industrial temperature range?
Yes, the MMA7456LR1 is RoHS compliant and rated for –40°C to +85°C operating temperature. Its LGA-14 package (Case 1977-01) and internal temperature compensation (TCO ±3.5 mg/°C) ensure stable offset and sensitivity across this full industrial range - validated in Freescale's Operating Characteristics table (Rev 4, p.7).
MMA7456LR1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 14-TFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g, 4g, 8g
- Sensitivity (LSB/g):
- 64 (±2g) ~ 16 (±8g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 62.5Hz ~ 125Hz
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 2.4V ~ 3.6V
- Features:
- Adjustable Bandwidth, Selectable Scale
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-LGA (3x5)
MMA7456LR1 FAQ
1.How can I place an order for MMA7456LR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA7456LR1 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 MMA7456LR1 reliable?
The price and inventory of MMA7456LR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA7456LR1 is usually 5 days.
3.What payment methods are accepted for MMA7456LR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA7456LR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA7456LR1?
MMA7456LR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA7456LR1 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 MMA7456LR1?
For technical support, including MMA7456LR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA7456LR1 requirements.
6.How does Aetrix verify that MMA7456LR1 is sourced from the original manufacturer or authorized distributors?
All MMA7456LR1 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 MMA7456LR1 meets industry standards.
7.What is the process for return or replacement of MMA7456LR1?
All MMA7456LR1 units undergo pre-shipment inspection (PSI). If there is an issue with MMA7456LR1, 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 MMA7456LR1 part is unused and in its original packaging.
Return procedure for MMA7456LR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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