NXP Semiconductors MMA1210KEG

Overview

MMA1210KEG from NXP Semiconductors (formerly Freescale) is a surface-mount, silicon capacitive micromachined accelerometer with integrated signal conditioning, factory-calibrated ±112.5g full-scale range, 4th-order Bessel low-pass filter (f_–3dB = 360–440 Hz), and ratiometric linear output (20 mV/g typical sensitivity at V_DD = 5.0 V). It is used in automotive crash sensing and industrial impact monitoring systems requiring AEC-Q100 Grade 2 qualification (–40°C to +125°C).

For engineers reviewing the MMA1210KEG datasheet, MMA1210KEG pinout, MMA1210KEG application, or MMA1210KEG equivalent, key selection criteria include its self-test capability (55–75 g response), STATUS fault-latch output, zero-g offset stability (±0.15 V at 25°C), and SOIC-16 package compatibility with board-level vibration isolation requirements.

Technical Context

The MMA1210KEG implements a dual-capacitor g-cell transducer hermetically sealed at wafer level, interfaced with a CMOS ASIC using switched-capacitor measurement techniques. Its signal path includes temperature-compensated gain, 4-pole Bessel filtering, and EPROM-trimmed calibration data stored on-chip.

Self-test activation applies electrostatic force to the movable plate via a dedicated ST pin, producing a calibrated output shift verified by the STATUS pin. Fault detection monitors low-voltage (VLVD = 3.25 V typ), clock frequency (f_min = 50–260 kHz), and EPROM parity-latching STATUS high until reset by ST pulse.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (Case 475-01), Pb-free, surface-mount. Dimensions: 10.3 mm × 7.5 mm × 2.4 mm (max). Thermal pad not present; standard reflow profile compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL372BCPZ and MMA8452Q, the MMA1210KEG uniquely delivers analog ratiometric output, AEC-Q100 Grade 2 qualification, and hardware-fault latching in a SOIC-16 package-making it irreplaceable for safety-critical impact detection where deterministic analog response and fault visibility are mandatory.

Availability

MMA1210KEG is available at Aetrix Electronics and suitable for automotive crash sensing, industrial vibration monitoring, and heavy-equipment impact detection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MMA1210KEG 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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Freescale's sensor and analog expertise.

The MMA1210KEG belongs to NXP's legacy high-g accelerometer product line, engineered specifically for mission-critical automotive safety systems and rugged industrial condition monitoring where reliability under extreme shock and temperature stress is non-negotiable.

FAQ

What is the full-scale acceleration range of the MMA1210KEG?

The MMA1210KEG has a full-scale range of ±112.5 g, meaning it can accurately measure accelerations from –112.5 g to +112.5 g before output saturation occurs. This range is factory-set and does not require external components. The MMA1210KEG maintains linearity and specified performance across its entire operating temperature range of –40°C to +125°C, making it suitable for high-shock applications like airbag deployment and structural impact recording.

How does the self-test function work on the MMA1210KEG?

The MMA1210KEG self-test is initiated by applying a logic-high signal to the ST pin, which activates an electrostatic force on the internal g-cell's movable plate. This produces a calibrated output shift of 55–75 g at VOUT, verifiable against expected voltage change. The STATUS pin reflects self-test status and latches fault conditions. The MMA1210KEG's self-test validates both mechanical integrity and electronic signal chain functionality without external stimulus-critical for pre-deployment verification in automotive safety systems.

What is the purpose of the STATUS pin on the MMA1210KEG?

The STATUS pin on the MMA1210KEG is an open-drain output that latches high upon detection of low-voltage condition (VDD < 3.25 V), clock frequency failure (outside 50–260 kHz), or EPROM parity error. It remains high until reset by a ≥100 μs pulse on the ST pin-unless the underlying fault persists. This behavior makes the STATUS pin essential for real-time fault visibility in safety-critical designs. The MMA1210KEG uses this pin to provide immediate, hardware-level feedback without software polling.

Does the MMA1210KEG require external filtering components?

Yes-the MMA1210KEG requires an external RC filter (1 kΩ resistor + 0.01 μF capacitor to ground) on the VOUT pin to suppress 70 kHz clock noise generated by its internal switched-capacitor filter. Additionally, a 0.1 μF ceramic capacitor must be placed directly between VDD and VSS for power supply decoupling. These components are mandatory per the datasheet to ensure specified noise performance (110 μV_RMS) and stable operation. The MMA1210KEG integrates all other signal conditioning, eliminating need for external op-amps or trim resistors.

Is the MMA1210KEG pin-compatible with other devices in the MMA1210 family?

Yes-the MMA1210KEG shares identical pinout, package (SOIC-16, Case 475-01), and electrical interface with MMA1210EG, MMA1210EGR2, and MMA1210KEGR2. The "K" suffix denotes alternate silicon sourcing but does not affect pin assignment, timing, or functional behavior. All variants use the same ST, VOUT, STATUS, VDD, and VSS connections with identical N/C pin mapping. Therefore, the MMA1210KEG can be substituted into existing designs using any of these part numbers without PCB modification.