NXP Semiconductors MMA1260DEGR2

Overview

MMA1260DEGR2 from NXP Semiconductors (formerly Freescale) is a single-axis, ±1.5g silicon capacitive micromachined accelerometer in 16-lead SOIC package, featuring integrated signal conditioning, factory-calibrated 2nd-order Bessel low-pass filter (f_−3dB = 40–60 Hz), and calibrated self-test. It delivers linear ratiometric analog output (1140–1260 mV/g) with zero-g offset at 2.5 V (V_DD = 5.0 V) and supports vibration monitoring and hard drive protection.

For engineers reviewing the MMA1260DEGR2 datasheet, MMA1260DEGR2 pinout, MMA1260DEGR2 application, or MMA1260DEGR2 equivalent, key selection considerations include its Z-axis sensitivity, SOIC-16 mechanical robustness, self-test verification capability, status fault-latch signaling, and operation across −40°C to +105°C industrial temperature range.

Technical Context

The MMA1260DEGR2 implements a surface-micromachined polysilicon g-cell with back-to-back capacitive sensing, read out via switched-capacitor CMOS ASIC. Its signal path includes temperature-compensated gain, integrator, and 2-pole Bessel filter - all monolithically integrated with EPROM-trimmed calibration data.

Self-test applies electrostatic force to the movable plate using a dedicated ST input, generating a known deflection verified by output voltage shift (∆V_ST = 0.3–0.9 V). The STATUS pin latches high on EPROM parity error or during active self-test, and resets only on rising ST edge if no persistent fault exists.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (Case 475-01), body dimensions 10.15–10.45 mm × 7.40–7.60 mm × 3.30–3.55 mm, with 1.27 mm pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-axis analog-output accelerometer applications.

Compared with ADXL322BCPZ-RL7 and KXSC7-2050-FR, the MMA1260DEGR2 uniquely combines analog output simplicity, factory-calibrated low-bandwidth filtering, hardware self-test verification, and latchable fault reporting - making it optimal for cost-sensitive, safety-aware industrial motion sensing where deterministic diagnostics are required without firmware overhead.

Availability

MMA1260DEGR2 is available at Aetrix Electronics and suitable for vibration monitoring, hard drive protection, appliance control, and computer peripheral design requiring stable component supply and long-term industrial-grade availability.

Supply support for MMA1260DEGR2 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 microcontroller heritage.

The MMA series was designed specifically for rugged, low-power, analog-output motion sensing in industrial and computing environments - emphasizing hermetic reliability, factory calibration, and hardware-level diagnostic features like self-test and status latching.

FAQ

What is the full-scale acceleration range of the MMA1260DEGR2?

The MMA1260DEGR2 has a full-scale acceleration range of ±1.5g, meaning it accurately measures static and dynamic acceleration from −1.5g to +1.5g along its sensitive Z-axis. This range is factory-set and does not require external scaling components. Within this range, the device maintains linearity better than 1.0% FSO and delivers a corresponding analog output voltage between approximately 1.3 V and 3.7 V when supplied with 5.0 V.

Does the MMA1260DEGR2 require external passive components for filtering?

No, the MMA1260DEGR2 integrates a 2nd-order switched-capacitor Bessel filter with a −3 dB bandwidth of 40–60 Hz, eliminating the need for external resistors or capacitors to set cutoff frequency. However, an external RC filter (1 kΩ + 0.1 µF) is recommended on the VOUT pin to suppress clock feedthrough noise from the internal switched-capacitor circuitry - a requirement explicitly stated in the datasheet's recommended connection diagram.

How does the self-test function work on the MMA1260DEGR2?

The MMA1260DEGR2 self-test applies a calibrated electrostatic force to the movable g-cell plate via the ST pin. When a logic-high signal is applied to ST, the internal circuitry generates a known deflection, resulting in a measurable output voltage shift (∆V_ST = 0.3–0.9 V). This verifies both mechanical integrity (g-cell mobility) and electronic signal chain functionality (ASIC, gain, filtering) - all without external test fixtures or disassembly.

What is the purpose of the STATUS pin on the MMA1260DEGR2?

The STATUS pin on the MMA1260DEGR2 is an open-drain output that goes high under two conditions: (1) when the EPROM parity check detects an odd number of bits (indicating calibration memory corruption), or (2) during active self-test. It latches high on fault and resets only upon a rising edge at ST - unless the underlying fault persists. This enables system-level diagnostics and fail-safe behavior in safety-critical motion sensing applications.

Is the MMA1260DEGR2 RoHS compliant and lead-free?

Yes, the MMA1260DEGR2 is RoHS compliant and lead-free. As a Freescale-designed part released in 2004 and later manufactured under NXP's quality systems, it conforms to EU Directive 2011/65/EU (RoHS 2) and uses matte tin lead finish on its SOIC-16 package. Full compliance documentation, including substance declarations and test reports, is available through NXP's official product change notifications and material content portals.