NXP Semiconductors MMA2301EG

Overview

MMA2301EG from NXP Semiconductors (formerly Freescale) is a surface-mount, silicon capacitive micromachined accelerometer with integrated signal conditioning, factory-calibrated ±200g full-scale range, 400 Hz typical bandwidth, and ratiometric linear output referenced to VDD. It operates across –40°C to +125°C and delivers self-test verification, low-voltage detection, and status fault latching for automotive crash sensing systems.

For engineers reviewing the MMA2301EG datasheet, MMA2301EG pinout, MMA2301EG application, or MMA2301EG equivalent, key selection criteria include its SOIC-16 package, 3.0–6.0 mA supply current, 4th-order Bessel filter, AEC-Q100 Grade 2 qualification, and dedicated ST/STATUS digital control and monitoring pins.

Technical Context

The MMA2301EG implements a monolithic CMOS ASIC paired with a wafer-level hermetically sealed polysilicon g-cell transducer. Its switched-capacitor front-end measures differential capacitance changes, applies EPROM-trimmed gain and offset correction, and drives a buffered analog voltage output with built-in 4-pole Bessel filtering.

Self-test activation applies electrostatic force to deflect the movable plate, generating a calibrated 24g-equivalent output shift. Fault detection includes clock frequency monitoring (50–260 kHz), low-voltage detection (trip at 3.25 V), and EPROM parity checking-each latching STATUS high until reset by ST pulse.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (Case 475-01), surface-mount, lead-free (KEG suffix), 7.5 mm × 10.3 mm body size with 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL206 and MMA8452Q, the MMA2301EG uniquely combines AEC-Q100 Grade 2 qualification, ±200g analog output, integrated self-test, and fault-latching STATUS functionality-making it irreplaceable for automotive crash sensing where deterministic analog response and functional safety validation are mandatory.

Availability

MMA2301EG is available at Aetrix Electronics and suitable for automotive airbag systems, industrial vibration recorders, impact event loggers, and heavy-equipment safety monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MMA2301EG 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 sensor products including the MMA series. NXP is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets.

The MMA2301EG belongs to Freescale's legacy Xtrinsic™ analog sensor portfolio, engineered specifically for high-reliability automotive safety applications requiring calibrated analog output, built-in diagnostics, and robust mechanical survivability.

FAQ

What is the operating voltage range for the MMA2301EG?

The MMA2301EG operates from 4.75 V to 5.25 V. Within this range, it delivers fully calibrated linear output; operation outside this window may yield linear but uncalibrated response. The device includes a low-voltage detect circuit that trips at 3.25 V nominal and asserts the STATUS pin high if VDD falls below this threshold. This ensures reliable fault signaling even during brownout conditions in automotive power systems.

Does the MMA2301EG require external passive components for basic operation?

The MMA2301EG requires only two external components for standard 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 or capacitors are needed for gain, offset, or filter cutoff setting-the 4th-order Bessel filter and calibration are fully integrated and factory-trimmed.

How does the self-test function verify both mechanical and electrical integrity of the MMA2301EG?

The MMA2301EG self-test applies electrostatic force to the movable g-cell plate via a dedicated fourth electrode, inducing a calibrated 24g-equivalent deflection. The resulting output shift is measured by the internal ASIC, confirming transducer mobility and signal path functionality. Simultaneously, the STATUS pin behavior during ST activation validates digital interface integrity-ensuring end-to-end verification without external test equipment.

What fault conditions cause the STATUS pin to latch high on the MMA2301EG?

The STATUS pin latches high on three independent fault conditions: (1) low-voltage detection (VDD < 3.25 V), (2) clock frequency failure (oscillator outside 50–260 kHz), or (3) EPROM parity error (odd number of bits). Once latched, STATUS remains high until reset by a ≥100 µs pulse on the ST pin-unless the underlying fault persists, in which case it reasserts immediately.

Is the MMA2301EG pin-compatible with other devices in the MMA2301 family?

Yes-the MMA2301EG, MMA2301EGR2, MMA2301KEG, and MMA2301KEGR2 share identical SOIC-16 pinout (Case 475-01), electrical characteristics, and functional block diagram. The KEG suffix denotes Pb-free packaging; R2 indicates tape-and-reel packaging. All variants are interchangeable at the board level for design reuse and supply chain flexibility.