Analog Devices Inc. ADXL377BCPZ-RL

Overview

ADXL377BCPZ-RL from Analog Devices is a 3-axis MEMS accelerometer with ±200 g full-scale range, 300 µA typical supply current, 1.8 V to 3.6 V single-supply operation, and user-adjustable bandwidth via external capacitors (CX/CY/CZ). It delivers ratiometric analog voltage outputs (XOUT/YOUT/ZOUT) and is engineered for high-g shock event detection in compact, low-power systems.

For engineers reviewing the ADXL377BCPZ-RL datasheet, ADXL377BCPZ-RL pinout, ADXL377BCPZ-RL application, or ADXL377BCPZ-RL equivalent, key selection considerations include its 3 mm × 3 mm × 1.45 mm LFCSP package, self-test capability (ST pin), ±0.5% nonlinearity, and z-axis bandwidth up to 1000 Hz - all critical for concussion monitoring, impact sensing, and industrial shock diagnostics.

Technical Context

The ADXL377BCPZ-RL implements an open-loop polysilicon surface-micromachined sensor with differential capacitive transduction and phase-sensitive demodulation. Its signal chain includes on-chip amplifiers with 32 kΩ output impedance and ratiometric scaling relative to VS.

Bandwidth is set per axis using external capacitors at XOUT/YOUT/ZOUT pins (f_{−3 dB} = 1/(2π × 32 kΩ × C_X)), enabling independent filtering: x/y axes support 0.5 Hz–1300 Hz, z-axis supports 0.5 Hz–1000 Hz. The device features built-in self-test (ST pin) that induces calibrated electrostatic deflection, producing −6.5 mV (x), +6.5 mV (y), and +11.5 mV (z) output shifts.

Key Specifications

Pinout & Package

The ADXL377BCPZ-RL is housed in a 3 mm × 3 mm × 1.45 mm, 16-lead lead frame chip scale package (LFCSP_LQ, CP-16-28) with exposed pad for mechanical integrity. Pin 1 is marked by a dot; the exposed pad is not electrically connected but must be soldered.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-g analog accelerometer applications.

Compared with ADXL377BCPZ-RL, the ADXL372BCCZ-RL7 offers dramatically lower power and digital intelligence but removes analog design freedom; the SCA3000-D01 provides SPI convenience but sacrifices noise performance and ratiometric scaling - making ADXL377BCPZ-RL optimal for analog-centric, high-fidelity shock capture where supply current under 1 mA is acceptable.

Availability

ADXL377BCPZ-RL is available at Aetrix Electronics and suitable for concussion detection systems, industrial shock monitors, and automotive crash event recorders requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADXL377BCPZ-RL 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The ADXL377BCPZ-RL belongs to Analog Devices' high-g MEMS accelerometer product line, designed specifically for impact, shock, and trauma detection applications demanding wide dynamic range and robust mechanical survivability.

FAQ

What is the operating voltage range for the ADXL377BCPZ-RL?

The ADXL377BCPZ-RL operates from 1.8 V to 3.6 V, with specifications guaranteed at 3.0 V. Its ratiometric output architecture ensures sensitivity and zero-g bias scale linearly with supply voltage, allowing flexible integration across battery-powered and regulated rail designs without recalibration.

How is bandwidth configured on the ADXL377BCPZ-RL?

Bandwidth on the ADXL377BCPZ-RL is set independently per axis using external capacitors CX, CY, and CZ connected to XOUT, YOUT, and ZOUT pins. The −3 dB frequency follows f = 1/(2π × 32 kΩ × C), supporting 0.5 Hz–1300 Hz on x/y axes and 0.5 Hz–1000 Hz on the z-axis - enabling precise anti-aliasing and noise reduction tailored to each sensing direction.

Does the ADXL377BCPZ-RL support self-test, and how is it activated?

Yes, the ADXL377BCPZ-RL supports hardware self-test via the ST pin. Applying VS (≥2.4 V) to ST activates electrostatic beam deflection, producing predictable output shifts: −6.5 mV at XOUT, +6.5 mV at YOUT, and +11.5 mV at ZOUT. In normal operation, ST may be left open or tied to GND; voltages above VS + 0.3 V must be avoided.

What is the package type and mounting requirement for the ADXL377BCPZ-RL?

The ADXL377BCPZ-RL uses a 3 mm × 3 mm × 1.45 mm, 16-lead LFCSP (CP-16-28) with an exposed pad. Though the pad is not internally connected, it must be soldered to the PCB for mechanical stability. Reflow profile follows JEDEC J-STD-020, with peak temperature of 260°C for Pb-free assembly.

What is the zero-g output voltage tolerance of the ADXL377BCPZ-RL at 3 V supply?

At VS = 3 V and TA = 25°C, the ADXL377BCPZ-RL delivers a zero-g output voltage of 1.5 V ±0.1 V (1.4 V to 1.6 V) on all three axes. This mid-rail bias allows symmetric measurement of positive and negative acceleration without external level-shifting circuitry.