NXP Semiconductors MMA1210KEGR2

Overview

MMA1210KEGR2 from Freescale Semiconductor is a surface-mount, silicon capacitive micromachined accelerometer with integrated signal conditioning, 4th-order Bessel low-pass filter, and factory-calibrated self-test. It delivers ratiometric linear output (20 mV/g sensitivity), ±112.5 g full-scale range, and operates from –40°C to +125°C on 4.75–5.25 V supply - used in automotive crash sensing and industrial vibration monitoring systems.

For engineers reviewing the MMA1210KEGR2 datasheet, MMA1210KEGR2 pinout, MMA1210KEGR2 application, or MMA1210KEGR2 equivalent, key selection criteria include its AEC-Q200 Grade 2 qualification, hermetically sealed wafer-level packaging, zero-g offset stability, and built-in fault detection via STATUS pin.

Technical Context

The MMA1210KEGR2 implements a dual-capacitor MEMS transducer with CMOS ASIC signal conditioning using switched-capacitor techniques. Its 4-pole Bessel filter (f_–3dB = 360–440 Hz) ensures linear phase response for pulse integrity, while factory-trimmed EPROM stores calibration coefficients for zero-g offset and sensitivity across temperature.

Self-test activation applies electrostatic force to the movable g-cell plate, producing a calibrated 55–75 g output shift verified by STATUS pin latching. Fault detection includes low-voltage detect (VLVD = 3.25 V typ), clock monitor (50–260 kHz), and EPROM parity check - all reported via open-drain STATUS output.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (Case 475-01), Pb-free, surface-mount. Hermetically sealed at wafer level for moisture and particle immunity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL206ARZ and MMA8452QT, the MMA1210KEGR2 provides higher full-scale range, deterministic analog output timing, and integrated hardware fault detection - making it uniquely suited for automotive safety systems requiring ISO 26262-compliant diagnostic coverage.

Availability

MMA1210KEGR2 is available at Aetrix Electronics and suitable for automotive crash sensing, industrial vibration monitoring, heavy equipment impact logging, and structural health monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MMA1210KEGR2 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 global semiconductor company specializing in embedded processing, sensors, and automotive ICs.

The MMA1210KEGR2 belongs to Freescale's high-reliability MEMS accelerometer product line, designed specifically for automotive safety and industrial condition monitoring applications demanding AEC-Q200 qualification and built-in diagnostics.

FAQ

What is the operating supply voltage range for the MMA1210KEGR2?

The MMA1210KEGR2 operates from 4.75 V to 5.25 V. Operation outside this range invalidates factory calibration and may cause undefined behavior. The device includes a low-voltage detect circuit that trips at 3.25 V (typical) and asserts the STATUS pin high to indicate fault. For reliable performance, a well-regulated 5.0 V ±2.5% supply with local 0.1 μF ceramic decoupling is mandatory per the datasheet layout guidelines.

Does the MMA1210KEGR2 require external components for basic operation?

Yes - the MMA1210KEGR2 requires two external passive components for proper operation: a 0.1 μF ceramic capacitor between VDD and VSS (placed ≤2 mm from pins), and an RC filter (1 kΩ resistor + 0.01 μF capacitor to ground) on the VOUT pin to suppress switched-capacitor clock noise. These are specified in the "Basic Connections" section of the datasheet and are essential to meet noise and bandwidth specifications.

How does the self-test function work on the MMA1210KEGR2?

The MMA1210KEGR2 self-test applies electrostatic force to the MEMS proof mass via an internal "test plate," generating a calibrated 55–75 g output shift at VOUT. Activation requires a logic-high pulse ≥100 μs on the ST pin. The STATUS pin latches high during test and remains high if faults (LVD, clock failure, EPROM parity) occur - it resets only after ST pulse if no active fault exists. This validates both mechanical and electronic functionality end-to-end.

What does the STATUS pin indicate on the MMA1210KEGR2?

The STATUS pin on the MMA1210KEGR2 is an open-drain output that latches high upon occurrence of any of three fault conditions: low-voltage detect (VDD < 3.25 V), clock frequency failure (outside 50–260 kHz), or EPROM parity error. It also goes high during self-test execution. The pin remains latched until reset by a rising edge on ST - but reasserts immediately if the underlying fault persists. No external pull-up is required as internal circuitry drives it.

Is the MMA1210KEGR2 RoHS-compliant and lead-free?

Yes - the MMA1210KEGR2 is RoHS-compliant and Pb-free, as confirmed in the Rev. 6 (09/2011) datasheet. It uses the same functionality and electrical characteristics as non-RoHS versions, with identical SOIC-16 (Case 475-01) packaging. The "R2" suffix denotes tape-and-reel packaging, and the "K" suffix indicates alternate silicon sourcing - both fully compatible with standard MMA1210EG/MMA1210KEG variants.