NXP Semiconductors MMA2240KEG

Overview

The MMA2240KEG from Freescale Semiconductor is a silicon capacitive, micromachined X-axis accelerometer with ±7g range, ratiometric linear output, integrated 2-pole Bessel filter (300 Hz typ), and factory-calibrated self-test-designed for vibration monitoring and dynamic suspension control in automotive and industrial systems.

For engineers reviewing the MMA2240KEG datasheet, MMA2240KEG pinout, MMA2240KEG application, or MMA2240KEG equivalent, key selection considerations include its SOIC-16 package, AEC-Q100 Grade 2 qualification (–40°C to +85°C), zero-g offset stability (±0.2 V), sensitivity of 0.50 VDD mV/g, and status-fault latching behavior on LVD/clock/EPROM parity failure.

Technical Context

The MMA2240KEG integrates a surface-micromachined polysilicon g-cell with a 1.2 µm CMOS ASIC containing capacitance-to-voltage conversion, two-stage switched-capacitor amplification, EPROM-trimmable offset/gain/temperature compensation, and a fully integrated 2-pole switched-capacitor Bessel filter (f_–3dB = 300 Hz typ).

Its signal chain delivers ratiometric output (VOFF = 2.500 V, S = 0.50 VDD mV/g at VDD = 5.0 V), supports self-test via electrostatic deflection (VST = 0.60 V), and reports faults-including low-voltage detect (VLVD = 3.25 V typ), clock monitor fail (f_min = 150–400 kHz), and EPROM parity error-on the open-drain STATUS pin.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (Case 475-01), Pb-free termination, RoHS-compliant, qualified per AEC-Q100 Grade 2 (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar accelerometer applications.

Compared with MMA2240EG and ADXL203CE, the MMA2240KEG uniquely combines AEC-Q100 Grade 2 qualification, integrated Bessel filtering, self-test verification, and fault-latched STATUS reporting-making it the only option among the three qualified for automotive suspension control and certified industrial vibration logging.

Availability

The MMA2240KEG is available at Aetrix Electronics and suitable for vibration monitoring systems, dynamic suspension control units, and structural health monitoring applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for MMA2240KEG 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 was a leading designer of embedded processors, sensors, and analog ICs, later acquired by NXP Semiconductors in 2015; its legacy automotive and industrial sensor portfolio remains widely deployed.

The MMA2240KEG belongs to Freescale's surface-micromachined accelerometer product line, engineered specifically for high-reliability automotive safety and industrial condition-monitoring applications where diagnostic integrity and environmental robustness are mandatory.

FAQ

What is the operating temperature range for the MMA2240KEG?

The MMA2240KEG is qualified per AEC-Q100 Grade 2 with an operating temperature range of –40°C to +85°C. This specification is validated across all electrical parameters including zero-g offset, sensitivity, bandwidth, and self-test response-ensuring consistent performance in under-hood automotive and industrial environments where thermal cycling is severe.

Does the MMA2240KEG require external components for basic operation?

No, the MMA2240KEG requires only a 0.1 µF decoupling capacitor on VDD and optionally a 1 kΩ + 0.01 µF RC filter on VOUT to suppress switched-capacitor clock noise. All signal conditioning-including 2-pole Bessel filtering, temperature compensation, and EPROM-trimmed gain/offset-is fully integrated, eliminating external op-amps, resistors, or timing components.

How does the STATUS pin behave during power-up and fault conditions?

The STATUS pin on the MMA2240KEG is invalid until the first rising edge is applied to the ST pin after power-up. It then latches high upon detection of low-voltage condition (VDD < 3.25 V), clock oscillator failure (frequency < 150 kHz), or odd EPROM parity-and remains latched until a ≥100 µs ST pulse is applied, provided the fault no longer persists.

Is the MMA2240KEG pin-compatible with other devices in the MMA2240 family?

Yes, the MMA2240KEG shares identical pinout, footprint (SOIC-16, Case 475-01), and electrical interface with MMA2240EG, MMA2240EGR2, and MMA2240KEGR2. Differences are limited to Pb-free termination (KEG suffix) and manufacturing facility-no PCB layout or firmware changes are needed when substituting within this family.

What mechanical shock levels can the MMA2240KEG withstand without damage?

The MMA2240KEG is rated for 2000 g mechanical shock (0.5 ms duration) when unpowered, and supports continuous operation under ≤100 g shocks of any duration. Its wafer-level hermetic seal and robust polysilicon g-cell structure ensure <5 ppm device failure rate in powered use-validated per AEC-Q100 mechanical stress testing protocols.