NXP Semiconductors MMA3202EG

Overview

MMA3202EG from Freescale Semiconductor is a dual-axis (X/Y) surface-micromachined capacitive accelerometer with integrated signal conditioning, 4th-order Bessel low-pass filtering, and factory-calibrated ±100g/±50g full-scale ranges. It delivers ratiometric linear analog outputs (XOUT/YOUT), operates from 4.75–5.25 V, draws 6–10 mA, and is qualified for automotive-grade operation from –40°C to +125°C. Used in hard drive protection and impact monitoring systems where pulse shape integrity and self-test verification are critical.

For engineers reviewing the MMA3202EG datasheet, MMA3202EG pinout, MMA3202EG application, or MMA3202EG equivalent, this page provides verified technical context, SOIC-20 package mapping, functional pin roles, real-world use scenarios, and two validated alternative accelerometers for vibration, impact, and motion-sensing designs requiring AEC-Q100 Grade 2 compliance.

Technical Context

The MMA3202EG implements a dual-axis silicon MEMS transducer hermetically sealed at wafer level, paired with a CMOS ASIC that performs switched-capacitor sensing, gain adjustment, temperature compensation, and 4-pole Bessel filtering. Its output stage is ratiometric to VDD and AVDD, with zero-g offset trimmed in EPROM and no external components required for filter cutoff or calibration.

Self-test is activated via digital ST input, inducing electrostatic deflection of the g-cell's center plate; status reporting is handled by an open-drain STATUS pin latched on LVD, clock monitor failure (50–260 kHz), or EPROM parity error. The device supports fault reset via ST pulse ≥100 µs and includes internal 2 kV ESD protection.

Key Specifications

Pinout & Package

Package: 20-lead SOIC (Case 475A-02), surface-mount, Pb-free (KEG suffix), 7.5 mm × 12.8 mm body size with 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL202E and MMA8452Q, the MMA3202EG uniquely provides factory-calibrated ±100g/±50g analog outputs with integrated Bessel filtering and hardware self-test-making it optimal for high-shock, analog-centric applications like HDD protection and industrial impact logging where signal integrity and deterministic fault verification are mandatory.

Availability

MMA3202EG is available at Aetrix Electronics and suitable for hard drive protection, impact monitoring, vibration analysis, and appliance control applications requiring stable component supply, automotive-grade temperature performance, and long-term lifecycle continuity.

Supply support for MMA3202EG 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 global semiconductor company specializing in embedded processing, sensors, and connectivity solutions for automotive, industrial, and consumer markets.

The MMA3202EG belongs to Freescale's Xtrinsic™ family of intelligent sensors, designed specifically for high-reliability motion sensing in automotive safety systems and industrial equipment where self-test, AEC-Q100 compliance, and analog output fidelity are essential.

FAQ

What is the operating supply voltage range for the MMA3202EG?

The MMA3202EG operates within a supply voltage range of 4.75 V to 5.25 V for guaranteed calibrated performance. Outside this range, the device may function but is not specified for linearity or sensitivity accuracy. Both VDD (digital) and AVDD (analog) supplies must be maintained within this window, with 0.1 µF decoupling capacitors recommended on each rail to suppress noise and ensure stable operation of the internal oscillator and signal chain.

How does the self-test feature of the MMA3202EG work?

The MMA3202EG self-test applies a calibrated electrostatic force to the MEMS g-cell's movable plate via the ST pin, causing a known deflection equivalent to ±9.6g to ±14.4g. This produces a corresponding shift in XOUT and YOUT voltages, verifying mechanical integrity of the sensor and electrical functionality of the entire signal path-including ASIC, trimming circuits, and output buffers. The STATUS pin also reflects fault conditions, and the latch can be reset by pulsing ST high for ≥100 µs.

What is the purpose of having separate VDD and AVDD pins on the MMA3202EG?

The MMA3202EG uses separate VDD (digital supply) and AVDD (analog supply) pins to isolate noise-sensitive analog circuitry-including the MEMS interface, gain stages, and output amplifiers-from digital switching transients. This separation improves power supply rejection ratio (PSRR), reduces coupling of clock noise into analog outputs, and maintains signal fidelity. Both supplies must be within 4.75–5.25 V and independently decoupled with 0.1 µF capacitors close to their respective pins.

Does the MMA3202EG require external components for its filter or calibration?

No, the MMA3202EG does not require external components for filtering or calibration. Its 4th-order Bessel low-pass filter is implemented using switched-capacitor techniques with factory-set cutoff frequency (~400 Hz), eliminating need for external resistors or capacitors. Zero-g offset, sensitivity, and temperature compensation are stored in on-chip EPROM and applied automatically-no external trim pots, DACs, or calibration routines are needed for basic operation.

What mechanical package does the MMA3202EG use, and is it RoHS compliant?

The MMA3202EG uses a 20-lead SOIC package (Case 475A-02), measuring 7.5 mm × 12.8 mm with 1.27 mm lead pitch. It is RoHS compliant and Pb-free, indicated by the "KEG" suffix in the part number. The package features wafer-level hermetic sealing of the MEMS die, enhancing reliability in humid or contaminated environments, and is qualified to AEC-Q100 Grade 2 for automotive under-hood applications.