NXP Semiconductors MMA3202D

Overview

MMA3202D from Freescale Semiconductor (formerly Motorola) is a dual-axis surface-mount micromachined capacitive accelerometer with integrated signal conditioning, 4th-order Bessel low-pass filtering, temperature compensation, and self-test capability. It delivers ±100g X-axis and ±50g Y-axis measurement ranges, ratiometric linear analog outputs (XOUT/YOUT), and operates across –40°C to +125°C with 4.75–5.25 V supply. It is used in hard drive protection, impact monitoring, and appliance control systems where robust mechanical integrity and calibrated pulse-preserving response are required.

For engineers reviewing the MMA3202D datasheet, MMA3202D pinout, MMA3202D application, or MMA3202D equivalent, this page provides verified technical context, SOIC-20 package mapping, axis-specific sensitivity values, self-test timing behavior, status fault latching logic, and real-world use-case implementation guidance for embedded motion-sensing designs.

Technical Context

The MMA3202D integrates a polysilicon g-cell transducer hermetically sealed at wafer level and a CMOS ASIC using switched-capacitor techniques to measure differential capacitance changes. Its signal path includes gain stages, temperature-compensated offset trimming via EPROM, and a factory-set 360–440 Hz Bessel filter that preserves phase margin (60°) and pulse shape integrity without external components.

It features three independent power domains (VDD, AVDD, VSS), a dedicated self-test input (ST) with electrostatic force actuation, and a STATUS pin that latches on Low Voltage Detect (2.7–4.0 V trip), clock monitor failure (<50 kHz or >260 kHz), or EPROM parity error-resettable only by ST pulse if fault persists.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (Case 475A-01), 12.67–12.96 mm × 7.40–7.60 mm × 3.30–3.55 mm body, 1.27 mm pitch, gull-wing leads. RoHS-compliant surface-mount footprint with recommended 0.1 µF VDD decoupling and 1 kΩ + 0.01 µF RC filter on each output.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL202E and MMA7260Q, the MMA3202D uniquely combines high-g dual-axis analog outputs, integrated Bessel filtering, wafer-level hermetic sealing, and comprehensive fault diagnostics - making it the only option qualified for automotive-adjacent industrial impact monitoring and hard-drive protection requiring >100 g range and system-level reliability validation.

Availability

MMA3202D is available at Aetrix Electronics and suitable for computer hard drive protection, industrial impact monitoring, and appliance vibration control requiring stable component supply across extended temperature and high-shock environments.

Supply support for MMA3202D 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, specializing in automotive, industrial, and networking solutions before its 2015 acquisition.

The MMA3202D belongs to Freescale's MMA3200 series of micromachined accelerometers engineered for high-reliability motion sensing in safety-critical and high-shock industrial applications - emphasizing calibrated self-test, hermetic packaging, and analog signal integrity.

FAQ

What is the operating temperature range of the MMA3202D?

The MMA3202D operates across –40°C to +125°C, with full specification compliance from –40°C to +105°C. Its temperature compensation circuitry maintains accuracy over this range, and the wafer-level hermetic seal prevents performance degradation due to thermal cycling or humidity exposure - critical for under-hood automotive or industrial enclosure deployments where the MMA3202D must remain stable across extreme ambient shifts.

How does the MMA3202D self-test function verify system integrity?

The MMA3202D self-test applies an electrostatic force to the g-cell's movable plate via the ST pin, generating a calibrated 9.6–14.4 g equivalent output on XOUT. This validates both mechanical deflection (g-cell) and electronic signal chain (ASIC, filter, output stage). The STATUS pin confirms successful execution, and the MMA3202D datasheet specifies response time and output amplitude tolerances - enabling deterministic pre-deployment verification without external test equipment.

Why does the MMA3202D have separate VDD and AVDD pins?

The MMA3202D uses separate VDD (digital supply) and AVDD (analog supply) pins to isolate noise-sensitive analog circuitry - including the g-cell interface, integrator, and output buffer - from digital switching transients. This separation, combined with dedicated VSS pins and recommended PCB layout (ground plane beneath device), reduces output noise to 110 mVrms (0.01 Hz–1 kHz) and ensures stable ratiometric performance - a design requirement explicitly validated in the MMA3202D characterization data.

What is the significance of the Bessel filter in the MMA3202D?

The MMA3202D's 4th-order Bessel filter provides maximally flat group delay across its 360–440 Hz bandwidth, preserving pulse shape and transient edge fidelity - unlike Butterworth or Chebyshev filters that introduce phase distortion. This is essential for accurate shock waveform capture in hard drive protection or impact monitoring, where timing of peak g-force onset determines system response. The filter is fully integrated, requiring no external components, as confirmed in the MMA3202D functional block diagram and electrical specifications.

Can the MMA3202D be used in safety-critical systems like airbag deployment?

While the MMA3202D includes self-test, LVD, and clock monitoring - features aligned with safety-system requirements - it was not certified to ISO 26262 or AEC-Q100 for automotive safety applications. Its datasheet explicitly states it is "not designed, intended, or authorized" for life-support or surgical implant use. For airbag systems, designers must select ASIL-certified alternatives; the MMA3202D remains appropriate for non-safety-critical industrial impact detection where the MMA3202D's fault diagnostics provide enhanced reliability but not functional safety certification.