NXP Semiconductors RD1986MMA2260D

Overview

RD1986MMA2260D from Freescale Semiconductor is a ±1.5g, X-axis silicon capacitive micromachined accelerometer in SOIC-16 package, featuring integrated 2-pole Bessel filter, factory-calibrated zero-g offset and full-scale span, self-test capability, and ratiometric analog output (1140–1260 mV/g). It operates from –40°C to +105°C with 4.75–5.25 V supply and is used in tilt monitoring, inclinometers, and trailer brake controls.

For engineers reviewing the RD1986MMA2260D datasheet, RD1986MMA2260D pinout, RD1986MMA2260D application, or RD1986MMA2260D equivalent, key selection considerations include its calibrated sensitivity, on-chip self-test logic, status fault latch, ESD-sensitive handling requirements, and SOIC-16 mechanical footprint compatibility with industrial embedded sensing systems.

Technical Context

The RD1986MMA2260D integrates a surface-micromachined polysilicon g-cell with a CMOS ASIC using switched-capacitor measurement techniques. Its signal path includes temperature-compensated gain, 2nd-order Bessel low-pass filtering (f_–3dB = 40–60 Hz), and EPROM-trimmed calibration data stored with parity check.

Self-test is implemented via electrostatic actuation of a dedicated test plate, generating a calibrated output shift (∆V_ST = 0.3–0.5 V) verified by internal control logic. The STATUS pin latches high on EPROM parity error and resets only on ST rising edge if no persistent fault exists.

Key Specifications

Pinout & Package

RD1986MMA2260D is housed in a 16-lead SOIC package (Case No. 475-01), 10.3 mm × 7.5 mm × 2.35 mm body size, with standard SOIC lead pitch (1.27 mm) 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 ADXL326BCPZ and MMA8451Q, RD1986MMA2260D uniquely combines factory-calibrated ±1.5g analog output, integrated self-test with STATUS flag, and SOIC-16 footprint-making it optimal for cost-sensitive, safety-aware industrial tilt and brake control systems requiring no firmware changes or layout revision.

Availability

RD1986MMA2260D is available at Aetrix Electronics and suitable for tilt monitoring, inclinometers, and trailer brake controls requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for RD1986MMA2260D 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 was a global semiconductor company specializing in embedded processing, analog, and sensor solutions before its acquisition by NXP Semiconductors in 2015.

The MMA series-including RD1986MMA2260D-was designed specifically for industrial and automotive aftermarket motion sensing, emphasizing factory-calibrated analog output, robust packaging, and integrated diagnostics for reliable deployment in harsh environments.

FAQ

What is the full-scale acceleration range and axis orientation of the RD1986MMA2260D?

The RD1986MMA2260D is a single-axis X-direction accelerometer with a full-scale range of ±1.5g. Its sensitivity is specified as 1140–1260 mV/g at 25°C and 5.0 V supply. The device outputs a ratiometric analog voltage centered at VDD/2 (2.5 V at 5 V), increasing for positive X-axis acceleration and decreasing for negative acceleration. This range is optimized for static tilt and low-frequency motion detection-not high-g shock or wideband vibration.

Does the RD1986MMA2260D require external components for basic operation?

No external passive components are required for core functionality. The RD1986MMA2260D integrates signal conditioning, temperature compensation, and a 2-pole Bessel filter. However, best practice mandates a 0.1 µF ceramic decoupling capacitor on VDD and an RC filter (1 kΩ + 0.01 µF) on VOUT to suppress switched-capacitor clock noise. STATUS requires an external pull-up resistor; ST has internal pull-down and needs no external bias.

How does the self-test feature of the RD1986MMA2260D work, and what output change should be expected?

The RD1986MMA2260D implements electrostatic self-test by applying a calibrated voltage across a dedicated test plate in the g-cell, inducing a known deflection. When ST is driven high, VOUT shifts by 0.3–0.5 V (typical 0.4 V) while maintaining linearity. This shift is independent of applied acceleration and confirms both mechanical integrity and analog signal chain functionality-enabling verification without external shakers or fixtures.

What does the STATUS pin indicate, and how is it reset?

The STATUS pin on the RD1986MMA2260D is an open-drain output that goes high during self-test or when EPROM parity becomes odd-indicating potential calibration memory corruption. It remains latched high after power-up until the first rising edge on ST. If a fault persists (e.g., ongoing parity error), STATUS stays high even after ST toggling; only removal of the underlying fault restores normal operation.

Is the RD1986MMA2260D RoHS-compliant and compatible with lead-free soldering processes?

Yes, the RD1986MMA2260D is RoHS-compliant and Pb-free, matching the functionality and electrical characteristics of its non-RoHS counterpart. Its SOIC-16 package supports standard lead-free reflow profiles (J-STD-020, peak 260°C). The device's wafer-level hermetic seal ensures reliability under thermal cycling stress common in Pb-free assembly, with no derating required for performance or lifetime.