NXP Semiconductors MMA6280QR2

Overview

MMA6280QR2 from Freescale Semiconductor is a dual-axis capacitive micromachined accelerometer with factory-trimmed ±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 6 mm × 6 mm × 1.45 mm QFN-16 package for tilt sensing and motion detection in portable electronics.

For engineers reviewing the MMA6280QR2 datasheet, MMA6280QR2 pinout, MMA6280QR2 application, or MMA6280QR2 equivalent, key selection criteria include g-select logic configuration (pins 1 & 2), Sleep Mode control (pin 12), ratiometric XOUT/ZOUT analog outputs, and compatibility with microcontroller ADC interfaces requiring low-noise layout per Figure 6.

Technical Context

The MMA6280QR2 integrates two surface-micromachined polysilicon g-cells with ASIC-based switched-capacitor readout, temperature compensation, and EEPROM-trimmed offset/sensitivity. Its internal clock generator runs at 11 kHz, enabling a 350 Hz (X) / 150 Hz (Z) –3 dB bandwidth without external components.

g-Select pins (1 and 2) configure gain via internal trimming circuits to deliver four discrete sensitivities: 800 mV/g (1.5 g), 600 mV/g (2 g), 300 mV/g (4 g), or 200 mV/g (6 g). Output is ratiometric-zero-g offset and sensitivity scale linearly with VDD-enabling direct interface to microcontroller ADCs without supply-voltage error correction.

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 but not recommended for soldering in consumer applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL322ARUZ and MMA8452QT, the MMA6280QR2 uniquely combines user-selectable analog full-scale range, sub-μA sleep current, and factory-trimmed ratiometric outputs-making it optimal for cost-sensitive, battery-constrained designs needing flexible analog interfacing without firmware complexity.

Availability

MMA6280QR2 is available at Aetrix Electronics and suitable for portable electronics, gaming controllers, and industrial impact monitoring requiring stable component supply and long-term manufacturability.

Supply support for MMA6280QR2 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 sensors for automotive, industrial, and consumer applications with emphasis on robustness and system-level integration.

The MMA6280QR2 belongs to Freescale's legacy micromachined accelerometer family targeting battery-powered portable devices-designed for low-power tilt, motion, and impact sensing with minimal external components and no calibration overhead.

FAQ

What is the operating temperature range for the MMA6280QR2?

The MMA6280QR2 operates across –40°C to +105°C, matching the extended industrial range specified in Table 2 of its datasheet. This range is validated for all performance parameters-including zero-g offset drift (±2.6 mg/°C), sensitivity shift, and Sleep Mode current-ensuring reliability in automotive cabin or outdoor portable environments where thermal cycling occurs.

How does the g-select feature work on the MMA6280QR2?

The g-select feature on the MMA6280QR2 uses logic levels on pins 1 (g-Select1) and 2 (g-Select2) to configure internal gain: 00 selects ±1.5 g (800 mV/g), 01 selects ±2 g (600 mV/g), 10 selects ±4 g (300 mV/g), and 11 selects ±6 g (200 mV/g). Pins default to 00 via internal pulldown, so leaving them unconnected sets the device to 1.5 g mode without external pull-downs.

Can the MMA6280QR2 be used with a 1.8 V supply?

No-the MMA6280QR2 requires a minimum supply voltage of 2.2 V for guaranteed calibrated operation, as stated in Table 2. At 1.8 V, the device may power on but will not meet specification for offset, sensitivity, or bandwidth; Freescale explicitly defines 2.2–3.6 V as the calibrated operating range, and operation below 2.2 V voids performance guarantees.

What is the purpose of the exposed die pad on the MMA6280QR2 QFN package?

The exposed die pad on the MMA6280QR2 QFN package is internally connected to VSS and serves as a thermal and electrical ground path. However, Freescale's PCB layout guidelines (Figure 7) explicitly advise against soldering it down for consumer applications-doing so risks mechanical stress-induced parameter shift and is unnecessary for thermal performance given the device's 500 μA max power dissipation.

Does the MMA6280QR2 require external passive components for filtering?

No-the MMA6280QR2 integrates a switched-capacitor low-pass filter with fixed 350 Hz (X) and 150 Hz (Z) –3 dB bandwidths, eliminating the need for external resistors or capacitors. Freescale recommends adding a 1.0 kΩ resistor and 0.1 µF capacitor on each output (XOUT/ZOUT) solely to suppress clock feedthrough noise from the internal sampling circuit-not to set filter characteristics.