NXP Semiconductors MMA1210EGR2

Overview

MMA1210EGR2 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), operates from 4.75–5.25 V, supports ±112.5 g full-scale range, and is qualified to AEC-Q100 Grade 2 (–40°C to +105°C) for automotive vibration monitoring.

For engineers reviewing the MMA1210EGR2 datasheet, MMA1210EGR2 pinout, MMA1210EGR2 application, or MMA1210EGR2 equivalent, key selection considerations include its SOIC-16 package, self-test verification capability, low-noise analog output (110 mV_rms, 0.1–1 kHz), and built-in fault detection via STATUS pin.

Technical Context

The MMA1210EGR2 implements a capacitive sensing cell (g-cell) with CMOS ASIC signal conditioning using switched-capacitor techniques. Its 4-pole Bessel filter (f_–3dB = 360–440 Hz) preserves pulse shape integrity without external components, and temperature compensation ensures stable offset and sensitivity across –40°C to +105°C.

Self-test is activated via ST pin, applying electrostatic force to deflect the movable plate and generate a calibrated output shift (~55 g equivalent). 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. Pin 1–3, 9–13, and 14–16 are no-connect (N/C); pins 4 (ST), 5 (VOUT), 6 (STATUS), 7 (VSS), and 8 (VDD) are functional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL322ARUZ and MMA8452Q, the MMA1210EGR2 uniquely combines analog ratiometric output, integrated self-test, STATUS fault signaling, and AEC-Q100 Grade 2 qualification-making it optimal for automotive and industrial vibration monitoring where deterministic diagnostics and analog simplicity are critical.

Availability

MMA1210EGR2 is available at Aetrix Electronics and suitable for automotive vibration monitoring, industrial impact recording, and structural health monitoring requiring stable component supply and long-term lifecycle support.

Supply support for MMA1210EGR2 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 leader in automotive, industrial, and sensor ICs, with deep expertise in MEMS and mixed-signal design.

The MMA1210EGR2 belongs to Freescale's surface-micromachined accelerometer product line, engineered specifically for high-reliability automotive safety and industrial condition monitoring applications requiring calibrated analog output and built-in diagnostics.

FAQ

What is the operating supply voltage range for the MMA1210EGR2?

The MMA1210EGR2 operates within a strict 4.75 V to 5.25 V supply range. Operation outside this window invalidates factory calibration, though the device may remain functional. The typical supply current is 3.0–6.0 mA, and a 0.1 μF ceramic capacitor must be placed close to the VDD pin for stable operation.

Does the MMA1210EGR2 require external components for filtering or biasing?

No, the MMA1210EGR2 integrates a 4th-order Bessel switched-capacitor filter with fixed cutoff (360–440 Hz), eliminating external resistors or capacitors for filtering. However, an external RC filter (1 kΩ + 0.01 μF) is recommended on VOUT to suppress clock noise, and a 0.1 μF decoupling capacitor is mandatory on VDD.

How does the self-test function work on the MMA1210EGR2?

The MMA1210EGR2 self-test applies electrostatic force to the MEMS proof mass via the ST pin. A logic-high pulse ≥100 μs causes a calibrated deflection, producing a 55–75 g-equivalent output shift at VOUT. This verifies both mechanical integrity (g-cell) and electronic signal path functionality in a single test.

What conditions cause the STATUS pin to go high on the MMA1210EGR2?

The STATUS pin on the MMA1210EGR2 latches high upon detection of low-voltage condition (VDD < 2.7 V), clock frequency failure (outside 50–260 kHz), or EPROM parity error. It remains high until reset by a rising edge on ST, unless the fault persists-enabling reliable fault logging in automotive control units.

Is the MMA1210EGR2 pin-compatible with other devices in the MMA1210 family?

Yes, the MMA1210EGR2 shares identical SOIC-16 pinout and electrical behavior with MMA1210EG, MMA1210KEG, and MMA1210KEGR2. The "K" suffix denotes alternate silicon sourcing but no functional or pinout difference; "R2" indicates tape-and-reel packaging-both are drop-in replacements for board-level design reuse.