NXP Semiconductors MMA6233Q

Overview

MMA6233Q from Freescale Semiconductor is a ±10g dual-axis capacitive micromachined accelerometer with integrated signal conditioning, 900 Hz bandwidth, 2.2 mA supply current, and ratiometric analog outputs for X/Y axes-designed for motion sensing in portable electronics requiring fast response and low-noise measurement down to 0.1 Hz.

For engineers reviewing the MMA6233Q datasheet, MMA6233Q pinout, MMA6233Q application, or MMA6233Q equivalent, this page delivers verified specifications, QFN-16 package layout, self-test functionality, noise performance (0.6 mV_RMS, 0.1–1 kHz), and real-world use cases including freefall detection and vibration monitoring.

Technical Context

The MMA6233Q implements a surface-micromachined polysilicon g-cell with switched-capacitor ASIC readout, delivering linear ratiometric voltage outputs proportional to acceleration on orthogonal X and Y axes. Its single-pole low-pass filter is factory-trimmed to 900 Hz and requires no external components.

Internal temperature compensation, EEPROM-trimmed zero-g offset and sensitivity, and a dedicated ST pin enable system-level self-test verification of both mechanical and electronic integrity. Power-up response time is 0.7 ms, supporting rapid deployment in event-triggered applications.

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 MMA6231Q and ADXL203CE, the MMA6233Q uniquely balances 900 Hz bandwidth, ±10 g range, and 2.2 mA consumption-making it optimal for responsive consumer motion control where cost, size, and moderate noise performance are prioritized over ultra-low power or metrology-grade precision.

Availability

MMA6233Q is available at Aetrix Electronics and suitable for pedometer systems, freefall detection circuits, vibration monitoring equipment, and appliance motion control applications requiring stable component supply and long-term production continuity.

Supply support for MMA6233Q 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 ICs with robust qualification and system-level integration.

The MMA6233Q belongs to the MMA6200 series of capacitive MEMS accelerometers engineered for cost-sensitive, space-constrained motion sensing in portable and industrial electronics-emphasizing ease of integration, factory calibration, and self-test reliability.

FAQ

What is the operating voltage range for the MMA6233Q?

The MMA6233Q operates from 2.7 V to 3.6 V. Within this range, it functions as a fully calibrated linear accelerometer; outside it, operation is not guaranteed. The device draws 2.2 mA typical at 3.3 V and features ratiometric outputs that scale directly with VDD-ensuring compatibility with microcontroller ADCs sharing the same supply rail. This eliminates need for separate voltage references in many designs.

How does the self-test function work on the MMA6233Q?

The MMA6233Q self-test applies an electrostatic force to the movable g-cell plate via the ST pin, generating a 2.0 g equivalent output step on XOUT and YOUT. When ST is driven high (≥0.7×VDD), internal circuitry charges a dedicated test electrode, deflecting the proof mass. The resulting analog output shift-measurable as ~240 mV at 3.3 V supply-validates both mechanical integrity and signal chain functionality without external stimulus.

What is the significance of the 0.6 mV_RMS noise specification for the MMA6233Q?

The 0.6 mV_RMS noise (0.1 Hz–1 kHz) translates to ~5 mg_RMS resolution at 120 mV/g sensitivity-enabling reliable detection of subtle motion such as walking gait cycles or low-amplitude machinery vibration. This noise floor is measured with recommended 1 kΩ + 0.1 µF RC filtering on outputs, and reflects the combined contribution of sensor element, ASIC, and on-chip filtering-no additional noise reduction circuitry is needed for most consumer applications.

Can the MMA6233Q be used for tilt sensing applications?

Yes, the MMA6233Q can perform basic tilt sensing within its ±10 g range, but it is not optimized for high-accuracy static angle measurement. Its zero-g offset drift is ±2.0 mg/°C, and nonlinearity is ±1.0% FSO-sufficient for coarse orientation detection (e.g., portrait/landscape switching), but insufficient for <0.5° precision. For true tilt applications, a lower-noise, lower-drift device like the ADXL345 or LIS3DH is recommended.

What PCB layout considerations are critical for the MMA6233Q?

Key PCB layout requirements for the MMA6233Q include: (1) connecting the exposed thermal pad directly to VSS ground plane; (2) placing a 0.1 µF ceramic capacitor between VDD and VSS within 2 mm of pins 3 and 4; (3) routing XOUT/YOUT traces away from noisy digital lines and adding 1 kΩ + 0.1 µF RC filters; (4) avoiding vias or traces under the QFN body to prevent shorting to the flag; and (5) maintaining a solid ground plane beneath the device to minimize EMI coupling into the analog outputs.