NXP Semiconductors MMA6270QT

Overview

MMA6270QT from Freescale Semiconductor is a dual-axis capacitive micromachined accelerometer with ±1.5 g to ±6 g selectable full-scale range, 800 mV/g sensitivity at 1.5 g, and integrated signal conditioning including a 1-pole switched-capacitor low-pass filter. It operates from 2.2 V to 3.6 V, draws 500 µA in active mode and 3 µA in Sleep Mode, and is housed in a 16-lead QFN (6 mm × 6 mm × 1.45 mm) for handheld battery-powered motion sensing applications such as laptop freefall detection and mobile phone image stabilization.

For engineers reviewing the MMA6270QT datasheet, MMA6270QT pinout, MMA6270QT application, or MMA6270QT equivalent, this page delivers verified technical context, exact pin functions, real-world use cases across consumer electronics and robotics, and two validated alternative accelerometers with documented functional trade-offs.

Technical Context

The MMA6270QT integrates dual surface-micromachined polysilicon g-cells with an ASIC that performs capacitance-to-voltage conversion using switched-capacitor techniques. Its ratiometric analog outputs (XOUT/YOUT) scale linearly with VDD, enabling direct interface to microcontroller ADCs without external reference voltage.

It features factory-trimmed zero-g offset and full-scale span, four discrete sensitivity modes selected via g-Select1/g-Select2 logic inputs, and a dedicated Sleep Mode input (Pin 12) that disables output drivers to reduce current to 3 µA. Internal sampling runs at 11 kHz, with bandwidth limited to 350 Hz by the on-chip filter.

Key Specifications

Pinout & Package

Package: 16-lead QFN (6 mm × 6 mm × 1.45 mm), Case 1622-02, Pb-free terminations, exposed die pad internally 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 MMA6270QT, MMA8451Q offers smarter digital features but adds firmware complexity and eliminates direct analog interfacing, while ADXL335 provides axis expansion at the cost of fixed range and no ultra-low-power mode-making MMA6270QT optimal for cost-sensitive, battery-powered dual-axis analog systems requiring hardware-selectable sensitivity and sub-µA sleep.

Availability

MMA6270QT is available at Aetrix Electronics and suitable for laptop freefall protection, mobile phone motion dialing, robotics tilt compensation, and appliance vibration monitoring requiring stable component supply across extended production lifecycles.

Supply support for MMA6270QT 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) was a leading designer of embedded processors and sensors, known for automotive, industrial, and consumer-grade analog and mixed-signal ICs.

The MMA6270QT belongs to Freescale's legacy micromachined accelerometer family, engineered specifically for low-cost, low-power motion sensing in battery-operated consumer electronics with minimal external component count.

FAQ

What is the operating voltage range for the MMA6270QT?

The MMA6270QT operates from 2.2 V to 3.6 V. Within this range, it delivers fully calibrated linear performance; operation below 2.2 V or above 3.6 V may yield uncalibrated output. The MMA6270QT requires VDD to rise to 2.2 V in under 0.1 ms at the pin to guarantee proper startup, as specified in the PCB layout guidelines.

How does the g-Select feature work on the MMA6270QT?

The MMA6270QT uses two logic inputs-g-Select1 (Pin 1) and g-Select2 (Pin 2)-to select among four full-scale ranges: 00 = ±1.5 g (800 mV/g), 01 = ±2 g (600 mV/g), 10 = ±4 g (300 mV/g), and 11 = ±6 g (200 mV/g). If left unconnected, internal pull-downs default the MMA6270QT to 1.5 g mode, simplifying designs needing only one sensitivity.

What is the function of the Sleep Mode pin on the MMA6270QT?

Pin 12 (Sleep Mode) is an active-low input that disables the MMA6270QT's output drivers and reduces supply current from 500 µA to 3 µA typical. Driving this pin low places the MMA6270QT into ultra-low-power state; driving it high restores normal operation with <2 ms enable response time. For lowest sleep current, configure g-Select for 1.5 g mode before entering sleep.

Does the MMA6270QT require external components for filtering or calibration?

No. The MMA6270QT integrates a 1-pole switched-capacitor low-pass filter with 350 Hz –3 dB bandwidth, eliminating need for external RC networks. Zero-g offset, full-scale span, and temperature compensation are factory-trimmed using on-chip EEPROM, so no external calibration circuitry or trim pots are required for baseline operation.

What package type and dimensions does the MMA6270QT use?

The MMA6270QT uses a 16-lead QFN package (Case 1622-02), measuring 6.0 mm × 6.0 mm × 1.45 mm with an exposed die pad internally connected to VSS. The footprint requires NSMD pads, 0.55 mm × 0.50 mm land pattern, and avoids soldering the flag down for consumer applications per Freescale's PCB design guidelines.