NXP Semiconductors MMA6260QR2

Overview

MMA6260QR2 from Freescale Semiconductor is a ±1.5g dual-axis capacitive micromachined accelerometer with integrated signal conditioning, 50 Hz bandwidth, 1.2 mA supply current, and ratiometric linear analog outputs for X and Y axes. It operates from 2.7 V to 3.6 V and is used in tilt monitoring, freefall detection, and motion sensing within portable electronics and industrial control systems.

For engineers reviewing the MMA6260QR2 datasheet, MMA6260QR2 pinout, MMA6260QR2 application, or MMA6260QR2 equivalent, key selection criteria include its factory-trimmed 50 Hz low-pass filter, self-test capability via ST pin, ±2000 g shock survivability, and QFN-16 package compatibility with surface-mount PCB layouts requiring minimal external components.

Technical Context

The MMA6260QR2 implements a surface-micromachined polysilicon g-cell with back-to-back capacitive sensing elements, paired with an ASIC using switched-capacitor techniques for capacitance-to-voltage conversion, temperature compensation, and single-pole filtering. Its output is ratiometric to VDD, ensuring system-level cancellation of supply-induced ADC errors.

Self-test is activated by applying logic high to the ST pin, generating electrostatic deflection of the movable plate; the resulting output shift (0.9 × VDD) verifies mechanical and electrical integrity. The device features internal EEPROM trim, fault latch on parity error, and no external passive components required for filter configuration.

Key Specifications

Pinout & Package

Package: 16-lead QFN (Case 1477-02), 6 mm × 6 mm × 1.98 mm, exposed thermal pad connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMA6261QR2 and ADXL202E, the MMA6260QR2 offers optimal balance of low-noise analog output, fixed 50 Hz filtering for tilt stability, and plug-and-play integration-making it preferred for cost-sensitive, battery-operated tilt and motion-sensing applications where external component count must be minimized.

Availability

MMA6260QR2 is available at Aetrix Electronics and suitable for tilt monitoring, freefall detection, and impact monitoring requiring stable component supply across industrial, consumer, and embedded OEM programs.

Supply support for MMA6260QR2 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 MMA6260QR2 belongs to Freescale's MMA6200 series of MEMS accelerometers designed specifically for low-cost, high-reliability motion sensing in portable and space-constrained applications with minimal external circuitry.

FAQ

What is the operating voltage range for the MMA6260QR2?

The MMA6260QR2 operates from 2.7 V to 3.6 V. Within this range, it functions as a fully calibrated linear accelerometer with ratiometric output. Operation outside this range may yield linear output but without guaranteed calibration accuracy. The device draws 1.2 mA typical supply current at 3.3 V, making it suitable for battery-powered designs where stable low-voltage operation is critical. The MMA6260QR2's VDD pin must be decoupled with a 0.1 µF capacitor per Freescale's layout recommendations.

How does the self-test function work on the MMA6260QR2?

The MMA6260QR2 self-test is activated by applying a logic high signal (>0.7 × VDD) to the ST pin (Pin 12). This applies a calibrated electrostatic force to the MEMS sensing element, causing a known deflection that produces a predictable output shift of 0.9 × VDD on both XOUT and YOUT pins. The response occurs within 2.0 ms and verifies mechanical integrity of the g-cell and electrical functionality of the signal chain. Self-test is disabled if EEPROM parity error is detected, ensuring reliability during field use.

What is the significance of ratiometric output in the MMA6260QR2?

Ratiometric output means the MMA6260QR2's zero-g offset (1.65 V at 3.3 V) and sensitivity (800 mV/g) scale linearly with VDD. As supply voltage changes, both parameters track proportionally-enabling direct connection to a microcontroller's ADC reference (e.g., AVCC) without additional voltage references or calibration. This eliminates supply-induced gain and offset errors in the analog-to-digital conversion process, improving system accuracy and reducing BOM cost. The MMA6260QR2 maintains this behavior across its full 2.7–3.6 V operating range.

Can the MMA6260QR2 be used in high-shock environments?

Yes, the MMA6260QR2 is rated for ±2000 g maximum acceleration and has been validated for drop testing from 1.2 m onto concrete. Its surface-micromachined polysilicon g-cell and robust QFN packaging provide exceptional mechanical survivability. This makes the MMA6260QR2 suitable for handheld devices, industrial tools, and transportation-mounted systems where exposure to mechanical shock is routine. However, sustained operation above ±1.5 g will saturate the output; the ±2000 g rating reflects survival limit, not measurement range.

What are the PCB layout requirements for the MMA6260QR2?

Freescale specifies strict PCB layout rules for the MMA6260QR2: the exposed thermal pad (flag) must be soldered to a solid ground plane; no traces or vias should run under the QFN body; VDD requires a 0.1 µF decoupling capacitor close to Pin 3; and each output (XOUT/YOUT) benefits from an RC filter (1.0 kΩ + 0.1 µF to ground) to suppress switched-capacitor clock noise. Physical proximity to the microcontroller is recommended, and the ground plane must connect all open-ended terminals shown in Freescale's layout guide to minimize noise coupling into the MMA6260QR2's sensitive analog outputs.