NXP Semiconductors MMA7360LR2

Overview

MMA7360LR2 from Freescale Semiconductor is a ±1.5g/±6g three-axis capacitive MEMS accelerometer with integrated signal conditioning, 0g-detect, self-test, g-select sensitivity switching, and sleep mode. It delivers ratiometric analog outputs (XOUT/YOUT/ZOUT), operates from 2.2–3.6 V, draws 400 µA active or 3 µA in sleep, and targets motion-aware portable electronics requiring freefall detection and tilt sensing.

For engineers reviewing the MMA7360LR2 datasheet, MMA7360LR2 pinout, MMA7360LR2 application, or MMA7360LR2 equivalent, key selection criteria include its dual-range g-select capability, 0g-detect logic output for interrupt-driven freefall response, fast 0.5 ms enable time, and LGA-14 package compatibility with space-constrained handheld designs.

Technical Context

The MMA7360LR2 integrates a surface-micromachined polysilicon g-cell sensor with an ASIC featuring switched-capacitor C-to-V conversion, on-chip 1-pole low-pass filtering, temperature compensation, and non-volatile trim for factory-calibrated offset and sensitivity. Its internal 11 kHz sampling clock drives synchronized X/Y/Z axis measurements without external timing components.

Control logic manages Sleep Mode activation via dedicated pin 7, g-Select range switching via pin 10, and Self Test initiation via pin 13; the 0g-Detect output (pin 9) asserts high only when all three axes measure within ±0.4 g of zero acceleration-enabling reliable linear freefall detection independent of orientation.

Key Specifications

Pinout & Package

Package: 3 mm × 5 mm × 1.0 mm LGA-14 (Case 1935-01), RoHS-compliant, surface-mountable with solder-mask-defined footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-axis low-g accelerometer applications.

Compared with ADXL335 and KXSC7-2050, the MMA7360LR2 uniquely combines analog ratiometric outputs, dedicated 0g-Detect hardware interrupt, and factory-trimmed dual-range sensitivity in a 3×5 mm LGA-making it optimal for cost-sensitive, battery-powered devices needing deterministic freefall response without MCU intervention.

Availability

MMA7360LR2 is available at Aetrix Electronics and suitable for laptop anti-theft systems, portable media player drop protection, mobile phone motion interfaces, pedometer motion sensing, and robotics tilt feedback requiring stable component supply and long-term industrial availability.

Supply support for MMA7360LR2 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) designed high-performance mixed-signal ICs for automotive, industrial, and consumer applications with emphasis on integration and reliability.

The MMA7360LR2 belongs to Freescale's MEMS accelerometer product line, engineered specifically for ultra-low-power, space-constrained portable electronics requiring robust freefall detection, motion-triggered user interaction, and factory-calibrated analog sensing without external components.

FAQ

What is the operating voltage range for the MMA7360LR2?

The MMA7360LR2 operates from 2.2 V to 3.6 V DC. Operation below 2.2 V may cause calibration drift or functional failure; above 3.6 V risks permanent damage per maximum ratings. The device's ratiometric outputs scale linearly with VDD, so using a stable 3.3 V supply ensures optimal signal-to-noise ratio and simplifies ADC reference alignment. Always place a 0.1 µF ceramic capacitor between VDD and VSS as close as possible to pin 6.

How does the 0g-Detect feature work on the MMA7360LR2?

The 0g-Detect feature on the MMA7360LR2 asserts a logic-high open-drain signal on pin 9 only when the absolute acceleration on all three axes (X, Y, Z) remains within ±0.4 g simultaneously-indicating true linear freefall. This hardware-level detection requires no firmware polling or computation. To use it, connect pin 9 to a microcontroller interrupt pin with pull-up resistor; the output responds within 2 ms of entering freefall and holds until acceleration exceeds threshold on any axis.

Can the MMA7360LR2 be used in both ±1.5g and ±6g modes simultaneously?

No-the MMA7360LR2 operates in only one sensitivity mode at a time, selected by the logic level on pin 10 (g-Select). A low signal configures ±1.5 g (800 mV/g), ideal for tilt and fine-motion sensing; a high signal configures ±6 g (206 mV/g), suited for shock and drop detection. The mode can be changed dynamically during operation, but both ranges are never active concurrently. Leaving pin 10 unconnected defaults to ±1.5 g due to internal pull-down.

What is the purpose of the Self Test pin on the MMA7360LR2?

The Self Test pin (pin 13) on the MMA7360LR2 initiates an electrostatic actuation sequence that physically deflects the MEMS g-cell to simulate +1 g acceleration on the Z-axis while applying smaller deflections to X and Y axes. This verifies mechanical integrity (e.g., post-reflow solder joint reliability) and electrical signal chain functionality-including C-to-V conversion, filtering, and output buffering-without requiring external test equipment. Activation requires a clean, glitch-free high pulse ≥100 ns.

Does the MMA7360LR2 require external passive components for basic operation?

Yes-the MMA7360LR2 requires three external components for reliable operation: a 0.1 µF ceramic capacitor between VDD and VSS (pin 6 to pin 5) for power supply decoupling; and 3.3 nF capacitors on each analog output (pins 2, 3, 4) to suppress switched-capacitor filter clock noise. These values are specified in Freescale's AN3447 and AN3484 application notes. Omitting them degrades noise performance and may cause aliasing at the internal 11 kHz sampling frequency.