NXP Semiconductors MMA2204KEG

Overview

MMA2204KEG from NXP Semiconductors (formerly Freescale) is a surface-mount, single-axis ±100g micromachined capacitive accelerometer in SOIC-16 package, featuring integral signal conditioning, ratiometric linear output, 4th-order Bessel low-pass filtering (f_–3dB = 360–440 Hz), and factory-calibrated self-test. It operates across –40°C to +105°C and delivers 20 mV/g sensitivity at 5.0 V supply for vibration monitoring and mechanical system protection.

For engineers reviewing the MMA2204KEG datasheet, MMA2204KEG pinout, MMA2204KEG application, or MMA2204KEG equivalent, this page provides verified technical context, validated pin functions, real-world use cases in hard drive protection and appliance control, and confirmed AEC-Q100 Grade 2 alternatives with documented functional differences.

Technical Context

The MMA2204KEG integrates a polysilicon MEMS g-cell with a CMOS ASIC using switched-capacitor techniques to measure differential capacitance changes, delivering a ratiometric analog voltage output proportional to acceleration. Its on-chip 4-pole Bessel filter preserves pulse shape integrity without external components, and its self-test applies electrostatic force to deflect the center plate-verifying both mechanical and electronic functionality.

Internal fault detection includes low-voltage detect (trip at 2.7–4.0 V), clock monitor (150–400 kHz range), and EPROM parity check, with status latching high on failure and resettable via ST pin pulse. The device is hermetically sealed at wafer level and qualified to AEC-Q100 Rev. F Grade 2.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (Case 475-01), Pb-free, surface-mountable with standard reflow profile. Dimensions: 9.65 mm × 3.91 mm × 1.75 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMA2204EG, the MMA2204KEG adds Pb-free compliance without performance trade-offs; versus ADXL322ARZ, it offers 50× greater range, integrated fault detection, and calibrated self-test - making it uniquely suited for industrial shock monitoring and automotive-grade reliability validation.

Availability

MMA2204KEG is available at Aetrix Electronics and suitable for vibration monitoring, hard drive protection, and appliance control requiring stable component supply across automotive, industrial, and computing end markets.

Supply support for MMA2204KEG 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

NXP Semiconductors acquired Freescale in 2015 and continues to support legacy Xtrinsic sensor portfolio with full documentation, longevity commitments, and automotive-grade quality systems.

The MMA2204KEG belongs to Freescale's legacy Xtrinsic analog accelerometer family, designed specifically for high-reliability, self-diagnosing motion sensing in harsh environments - emphasizing AEC-Q100 qualification, wafer-level hermeticity, and system-level fault coverage.

FAQ

What is the operating temperature range of the MMA2204KEG?

The MMA2204KEG is rated for continuous operation from –40°C to +105°C and is qualified to AEC-Q100 Rev. F Grade 2. This range is validated across all specifications including sensitivity, offset, and self-test response - making MMA2204KEG suitable for under-hood automotive and industrial control cabinet deployments where thermal cycling is expected.

Does the MMA2204KEG require external components for basic operation?

Yes - the MMA2204KEG requires a 0.1 µF ceramic decoupling capacitor on VDD placed within 2 mm of the pin, and an RC filter (1 kΩ + 0.01 µF) on VOUT to suppress switched-capacitor clock noise. These are mandatory per the datasheet; omission causes output instability and increased RMS noise beyond the specified 110 mV_RMS.

How does the self-test function verify system integrity in the MMA2204KEG?

The MMA2204KEG self-test applies electrostatic force to the MEMS center plate via a dedicated fourth electrode, producing a calibrated 10–14 g mechanical deflection. The resulting 200–280 mV output shift validates the full signal path - g-cell capacitance change, ASIC measurement, filtering, and analog output stage - confirming both mechanical and electronic functionality without external stimulus.

What does the STATUS pin indicate, and how is it reset?

The STATUS pin on the MMA2204KEG is an open-drain output that latches high on low-voltage detect (VDD < 2.7 V), clock frequency failure (<150 kHz or >400 kHz), or EPROM parity error. It is reset by applying a ≥100 µs high pulse to the ST pin - unless the underlying fault persists, in which case STATUS remains asserted. This behavior is fully documented in Table 2 and Section "Status" of the MMA2204KEG datasheet.

Is the MMA2204KEG pin-compatible with other devices in the MMA220x series?

Yes - the MMA2204KEG shares identical SOIC-16 pinout, electrical characteristics, and functional block diagram with MMA2204EG, MMA2204EGR2, and MMA2204KEGR2. All variants use Case 475-01 package and have identical pin assignments, allowing direct substitution in existing layouts when Pb-free compliance or tape-and-reel packaging is required.