NXP Semiconductors MMA7360LR1

Overview

MMA7360LR1 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, consumes 400 µA active / 3 µA sleep current, and is housed in a 3 mm × 5 mm × 1.0 mm LGA-14 package for handheld motion-sensing applications including freefall detection in laptops and HDD protection.

For engineers reviewing the MMA7360LR1 datasheet, MMA7360LR1 pinout, MMA7360LR1 application, or MMA7360LR1 equivalent, key selection considerations include its dual-range g-select capability (800 mV/g at ±1.5g, 206 mV/g at ±6g), 0.5 ms enable response time, on-chip low-pass filtering, and factory-trimmed zero-g offset requiring no external calibration components.

Technical Context

The MMA7360LR1 integrates a surface-micromachined polysilicon g-cell sensor with an ASIC featuring switched-capacitor readout, temperature-compensated gain control, and a single-pole switched-capacitor filter. Its output voltage is ratiometric to VDD, ensuring supply-induced errors cancel during ADC conversion.

Control logic manages Sleep Mode (pin 7), g-Select (pin 10), Self Test (pin 13), and 0g-Detect (pin 9) - all implemented via CMOS-compatible digital inputs/outputs. The device uses internal NVM trim circuits to set zero-g offset and sensitivity, eliminating external trimming components.

Key Specifications

Pinout & Package

Package: 14-pin LGA (3 mm × 5 mm × 1.0 mm, Case 1935-01), bottom-terminal surface-mount with exposed thermal pad (no internal connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL335BCPZ and KXSC7-2050, the MMA7360LR1 uniquely combines factory-trimmed analog outputs, hardware 0g-detect interrupt, and self-test in a 3×5 mm LGA - making it optimal for cost-sensitive, battery-powered freefall and motion UI systems needing minimal external components and deterministic response timing.

Availability

MMA7360LR1 is available at Aetrix Electronics and suitable for laptop freefall protection, portable media player shock detection, and mobile phone motion UI applications requiring stable component supply and long-term industrial availability.

Supply support for MMA7360LR1 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 and sensor ICs for automotive, industrial, and consumer electronics with emphasis on integration and reliability.

The MMA7360LR1 belongs to Freescale's MEMS accelerometer product line, engineered specifically for ultra-low-power, space-constrained motion-sensing applications where analog output simplicity, hardware freefall detection, and factory calibration reduce system-level design complexity.

FAQ

What is the supply voltage range for the MMA7360LR1?

The MMA7360LR1 operates from 2.2 V to 3.6 V. Operation outside this range may yield unpredictable behavior or calibration drift, as specified in Table 2 of the datasheet. At 3.3 V nominal supply, the device delivers 800 mV/g sensitivity in ±1.5g mode and maintains 400 µA typical active current. The ratiometric output ensures offset and gain scale linearly with VDD, simplifying ADC interfacing in variable-supply systems.

How does the 0g-Detect feature work on the MMA7360LR1?

The 0g-Detect feature on the MMA7360LR1 asserts a logic-high open-drain signal on pin 9 when acceleration on all three axes remains below ±0.4 g for a sustained period - indicating linear freefall. This hardware-generated interrupt eliminates software polling overhead and enables sub-millisecond response to drop events. The MMA7360LR1's internal logic guarantees deterministic timing, making it ideal for HDD head parking and anti-theft activation in laptops and portable devices.

Can the MMA7360LR1 be used without external passive components?

Yes - the MMA7360LR1 requires only a 0.1 µF VDD decoupling capacitor and optional 3.3 nF output capacitors to suppress clock noise; no external resistors or trimming components are needed. Factory NVM trim sets zero-g offset and sensitivity, and the on-chip switched-capacitor filter eliminates external RC networks. This minimizes BOM count and PCB area, supporting compact designs like ultraportable laptops and wearables where the MMA7360LR1 is commonly deployed.

What is the purpose of the g-Select pin on the MMA7360LR1?

The g-Select pin (pin 10) configures the MMA7360LR1's full-scale range: logic low selects ±1.5g (800 mV/g sensitivity) for high-resolution motion tracking; logic high selects ±6g (206 mV/g) for shock and vibration monitoring. An internal pull-down ensures ±1.5g mode when the pin is left unconnected. This dual-range capability allows one hardware design to serve multiple applications - e.g., pedometer mode and drop-test mode - without changing the MMA7360LR1 footprint or bill of materials.

Does the MMA7360LR1 support self-test, and how is it triggered?

Yes, the MMA7360LR1 supports hardware self-test via pin 13 (Self Test). Applying a logic high pulse initiates electrostatic actuation of the g-cell beams, generating a calibrated output shift: ±0.05g on X/Y axes and ±0.8g on Z axis. This verifies mechanical integrity, solder joint reliability, and analog signal chain functionality - critical for HDD protection and safety-critical deployments. The test can be performed at any time, including after reflow, without external equipment, confirming the MMA7360LR1 remains fully operational before system deployment.