NXP Semiconductors MMA2202KEG

Overview

MMA2202KEG from Freescale Semiconductor is a surface-mount, silicon capacitive, micromachined X-axis accelerometer with ±50g range, factory-calibrated 4-pole Bessel low-pass filter (f_–3dB = 400 Hz typ), and integrated signal conditioning. It delivers ratiometric linear output (0.50 VDD mV/g/V) and operates across –40°C to +105°C for automotive-grade vibration monitoring and hard drive protection.

For engineers reviewing the MMA2202KEG datasheet, MMA2202KEG pinout, MMA2202KEG application, or MMA2202KEG equivalent, key selection considerations include its SOIC-16 package, self-test capability with 12g response, status fault latching (LVD/clock/EPROM parity), and ESD-sensitive handling requirements (2 kV internal protection).

Technical Context

The MMA2202KEG integrates a wafer-level hermetically sealed polysilicon g-cell transducer with a CMOS ASIC featuring switched-capacitor sensing, temperature compensation, and on-chip 4th-order Bessel filtering-preserving pulse shape integrity without external components. Its ratiometric architecture ensures offset and sensitivity scale linearly with VDD (4.75–5.25 V), enabling supply-noise rejection in microcontroller ADC interfaces.

Self-test activation applies electrostatic force to deflect the center plate, producing a calibrated 10–12g output response verified via STATUS pin latching. Fault detection includes low-voltage detect (VLVD = 3.25 V typ), clock monitor (f_min = 150 kHz), and EPROM parity checking-all reported on the open-drain STATUS output.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (Case 475-01), Pb-free, surface-mount. Dimensions: 9.65 mm × 5.92 mm × 1.75 mm (max), 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL322BCPZ and MMA2202EG, the MMA2202KEG uniquely combines AEC-Q100 Grade 2 qualification, integrated self-test with status latching, and factory-set Bessel filtering-making it optimal for automotive and industrial systems requiring field-verifiable sensor integrity without added diagnostic circuitry.

Availability

MMA2202KEG is available at Aetrix Electronics and suitable for vibration monitoring, hard drive protection, and appliance control applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for MMA2202KEG 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 fabless semiconductor company specializing in embedded processing, sensors, and analog solutions for automotive, industrial, and consumer markets.

The MMA series was designed as a family of fully integrated, factory-calibrated analog accelerometers targeting cost-sensitive, high-reliability applications where self-test, ratiometric output, and AEC-Q100 compliance are mandatory.

FAQ

What is the operating temperature range for the MMA2202KEG?

The MMA2202KEG is rated for continuous operation from –40°C to +105°C and is qualified to AEC-Q100 Grade 2 standards. This range covers under-hood automotive environments and industrial equipment enclosures. The device maintains full specification compliance-including sensitivity, offset, and bandwidth-throughout this range, with internal temperature compensation ensuring stability across thermal gradients.

Does the MMA2202KEG require external components for basic operation?

The MMA2202KEG requires only two external passive components for reliable operation: a 0.1 μF ceramic capacitor between VDD and VSS for power supply decoupling, and an RC filter (1 kΩ + 0.01 μF) on VOUT to suppress switched-capacitor clock noise. No external resistors, capacitors, or trimming components are needed for zero-g offset or sensitivity calibration-the device is fully factory-trimmed and self-contained.

How does the self-test function work on the MMA2202KEG?

The MMA2202KEG self-test applies an electrostatic force to the movable g-cell plate via the ST pin, producing a calibrated 10–12g equivalent output on VOUT. When ST is driven high, the internal ASIC activates a test voltage across a dedicated self-test plate, causing mechanical deflection. The resulting analog output change-measurable at VOUT-and simultaneous STATUS pin assertion confirm end-to-end functionality of both sensor and signal chain.

What fault conditions does the STATUS pin indicate on the MMA2202KEG?

The STATUS pin on the MMA2202KEG latches high when any of three fault conditions occur: supply voltage falling below the low-voltage detect threshold (VLVD ≈ 3.25 V), internal clock frequency dropping below 150 kHz, or EPROM parity becoming odd. The latch remains asserted until ST is pulsed high for ≥100 μs-unless the underlying fault persists-enabling deterministic fault recovery in safety-critical firmware.

Is the MMA2202KEG pin-compatible with other devices in the MMA2202 family?

Yes, the MMA2202KEG is pin-compatible with all variants in the MMA2202 family-including MMA2202EG, MMA2202EGR2, and MMA2202KEGR2-sharing identical SOIC-16 (Case 475-01) packaging, pinout, electrical interface, and functional block diagram. Differences are limited to RoHS compliance documentation, tape-and-reel packaging, and manufacturing site; no PCB or schematic changes are required when substituting within this family.