Analog Devices Inc. ADXL1002BCPZ

Overview

ADXL1002BCPZ from Analog Devices is a single-axis, high-frequency MEMS accelerometer with analog output, optimized for industrial condition monitoring. It delivers ±50 g full-scale range, 25 µg/√Hz noise density, 11 kHz 3 dB bandwidth, and operates from −40°C to +125°C in a 5 mm × 5 mm × 1.80 mm LFCSP package-enabling precise vibration sensing in bearing health monitoring systems.

For engineers reviewing the ADXL1002BCPZ datasheet, ADXL1002BCPZ pinout, ADXL1002BCPZ application, or ADXL1002BCPZ equivalent, key selection criteria include its ratiometric 40 mV/g sensitivity, sub-50 µs standby recovery, integrated self-test and overrange detection, and compatibility with high-bandwidth signal chains up to 10 kHz.

Technical Context

The ADXL1002BCPZ implements a polysilicon surface-micromachined proof mass suspended by springs, with differential capacitive sensing and phase-sensitive demodulation to generate a voltage output proportional to acceleration. Its analog output is fully ratiometric to VDD (3.0–5.25 V), ensuring consistent scaling across supply variations.

It supports two operating modes: continuous measurement mode (1.0 mA typical quiescent current) and low-power standby mode (225 µA typical, <50 µs wake-up). The OR pin provides instantaneous, unlatched overrange indication (>100 g), while ST enables full electromechanical self-test with ~300 µs activation and recovery.

Key Specifications

Pinout & Package

ADXL1002BCPZ is housed in a 32-lead, 5 mm × 5 mm × 1.80 mm LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad (EPAD) requiring connection to ground for optimal thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-frequency MEMS accelerometer applications.

Compared with ADXL1002BCPZ, ADXL1001BCPZ offers higher full-scale range at the cost of 17% higher noise floor, while PCB 352C33 provides mature piezoelectric performance but lacks dc response, onboard self-test, and integrated power efficiency-making ADXL1002BCPZ optimal for modern embedded condition monitoring with autonomous diagnostics.

Availability

ADXL1002BCPZ is available at Aetrix Electronics and suitable for condition monitoring, predictive maintenance, and health usage monitoring systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for ADXL1002BCPZ 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADXL100x series is part of Analog Devices' precision MEMS sensor portfolio, designed specifically for high-bandwidth, low-noise industrial vibration sensing-targeting reliability-critical machine health applications where signal fidelity and environmental robustness are non-negotiable.

FAQ

What is the full-scale measurement range of the ADXL1002BCPZ?

The ADXL1002BCPZ has a full-scale measurement range of ±50 g. This means it can accurately measure acceleration magnitudes from −50 g to +50 g without clipping or saturation. Its design targets high-frequency vibration analysis in machinery where moderate g-range coverage is sufficient-such as detecting bearing faults or gear mesh anomalies-while maintaining ultralow noise performance at 25 µg/√Hz.

How does the ratiometric output of the ADXL1002BCPZ affect system design?

ADXL1002BCPZ features a ratiometric analog output: both sensitivity (40 mV/g) and zero-g offset (VDD/2) scale linearly with the supply voltage VDD (3.0–5.25 V). This eliminates gain error when the downstream ADC uses the same VDD as its reference voltage. Designers should route VDD cleanly to both ADXL1002BCPZ and the ADC reference to leverage this feature-avoiding separate regulators that introduce mismatched tolerances and temperature drift.

Can the ADXL1002BCPZ operate in standby mode, and what is its wake-up time?

Yes, ADXL1002BCPZ supports an active-high STANDBY input that places the device into low-power standby mode, reducing supply current to 225 µA (typical at 5 V). Upon deassertion, ADXL1002BCPZ recovers to full measurement mode in under 50 µs-ensuring minimal latency for on-demand acquisition. This capability is essential for battery-operated wireless sensors that require ultra-low average power while retaining real-time responsiveness.

What is the purpose of the OR (Overrange) pin on the ADXL1002BCPZ?

The OR pin on ADXL1002BCPZ is an open-drain output that pulses high whenever acceleration exceeds approximately ±100 g-twice the full-scale range. It is not latched and reflects instantaneous overrange events, enabling real-time hardware-level fault detection. This signal can trigger interrupt-driven logging or protective shutdown in safety-critical systems, and the internal clock is disabled for 200 µs during each overrange event to protect the MEMS structure.

Does the ADXL1002BCPZ include a self-test function, and how is it activated?

Yes, ADXL1002BCPZ integrates a complete electromechanical self-test (ST) function. Applying a logic-high signal to the ST pin electrostatically actuates the proof mass, generating a known displacement equivalent to ~6.9–13.6 g (275–545 mV output delta, ratiometric to VDD). The test completes in ~300 µs and validates both mechanical integrity and signal chain functionality-critical for field-deployed systems requiring periodic in-situ verification without external shakers or calibration rigs.