Texas Instruments DRV-ACC16-EVM

Overview

DRV-ACC16-EVM from Texas Instruments is an evaluation module centered on the ADXL326BCPZ 3-axis analog-output accelerometer, designed for lab-based quantification of vibration in haptic feedback systems. It delivers simultaneous X/Y/Z acceleration measurements up to ±16 g_peak, with 57 mV_peak/g_peak sensitivity and DC-coupled 1.5 V offset, enabling direct oscilloscope readout for haptic actuator characterization.

For engineers reviewing the DRV-ACC16-EVM datasheet, DRV-ACC16-EVM pinout, DRV-ACC16-EVM application, or DRV-ACC16-EVM equivalent, this module supports rapid validation of ERM, LRA, and piezo actuator vibration profiles - including axis identification, peak acceleration calculation, and fixture-based test setup - without firmware or digital interface overhead.

Technical Context

The DRV-ACC16-EVM integrates the ADXL326BCPZ QFN16 accelerometer with on-board signal conditioning, a TLV70030DCKT 3-V LDO regulator, and three dedicated analog output test points (XOUT, YOUT, ZOUT). Its analog interface eliminates ADC dependency and enables real-time waveform capture using standard oscilloscopes.

It features channel-specific bandwidths: 1600 Hz for X/Y axes and 550 Hz for the Z axis, matching typical haptic actuator resonance profiles. The board includes 3M adhesive tape on its backside for non-invasive mounting and mechanical isolation via foam/gel substrates to replicate end-use environments.

Key Specifications

Availability

DRV-ACC16-EVM is available at Aetrix Electronics and suitable for haptic actuator evaluation, vibration test fixture development, and comparative reporting of ERM/LRA/piezo performance requiring stable component supply and traceable sourcing.

Supply support for DRV-ACC16-EVM 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

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and high-reliability silicon solutions for industrial, automotive, and consumer applications.

The DRV-ACC16-EVM belongs to TI's haptic evaluation ecosystem and was engineered specifically to accelerate lab validation of tactile feedback systems - bridging mechanical vibration and electrical measurement without requiring custom signal chain design.

FAQ

What is the primary function of the DRV-ACC16-EVM?

The DRV-ACC16-EVM is a ready-to-use evaluation module that enables direct analog measurement of three-axis acceleration in haptic feedback testing. It uses the ADXL326BCPZ accelerometer to convert mechanical vibration into proportional voltage outputs (XOUT/YOUT/ZOUT), allowing engineers to quantify g-force levels, identify vibration axes, and validate haptic waveforms using only an oscilloscope and USB power - no microcontroller or firmware required. The DRV-ACC16-EVM streamlines lab-based actuator characterization across ERM, LRA, and piezo technologies.

How do I convert oscilloscope voltage readings to g-force using the DRV-ACC16-EVM?

To convert voltage to g-force with the DRV-ACC16-EVM, measure the peak voltage (V_peak) of any axis output (X, Y, or Z) on an oscilloscope, then divide by 57 mV_peak/g_peak. For example, a measured 149.2 mV_pp waveform yields 74.6 mV_peak, corresponding to 1.309 g_peak. The DRV-ACC16-EVM maintains a fixed 1.5 V DC offset at 0 g, so AC coupling removes baseline drift and isolates dynamic acceleration components - critical for accurate haptic effect analysis.

Can the DRV-ACC16-EVM be used with different types of haptic actuators?

Yes - the DRV-ACC16-EVM is explicitly validated for use with eccentric rotating mass (ERM), linear resonant actuator (LRA), and piezo modules. Its asymmetric bandwidth (1600 Hz for X/Y, 550 Hz for Z) aligns with ERM rotational vibration and LRA axial resonance, while its flexible mounting (3M tape, screw holes, or fixture integration) accommodates diverse mechanical form factors. The DRV-ACC16-EVM user guide includes axis identification diagrams and mounting stack-up examples for each actuator type to ensure correct orientation and signal interpretation.

Does the DRV-ACC16-EVM require external power regulation or signal conditioning?

No - the DRV-ACC16-EVM includes an integrated TLV70030DCKT LDO that regulates USB 5 V down to a stable 3 V supply for the ADXL326BCPZ accelerometer. All signal paths are pre-conditioned: outputs are buffered, filtered with ferrite beads (FB1/FB2), and routed to labeled test points (TP1–TP3) with color-coded insulation (black/orange/red). This eliminates external power supplies, op-amps, or level-shifting circuits - the DRV-ACC16-EVM operates immediately upon connecting a micro-USB cable and oscilloscope probes.

What mechanical mounting options does the DRV-ACC16-EVM support?

The DRV-ACC16-EVM supports two primary mounting methods: (1) adhesive attachment using the pre-applied 3M transfer tape on its backside for rapid, non-destructive placement on vibrating surfaces; and (2) mechanical fixation via two standardized screw holes (illustrated in Figure 17) for repeatable positioning in test fixtures. Both methods maintain minimal mass loading and preserve natural motion - essential for accurate haptic response measurement. Mounting guidelines in the DRV-ACC16-EVM User's Guide specify isolation techniques (e.g., foam or silicone gel substrates) to prevent energy loss and environmental coupling.