VL53L9CX – Mechanical Vibration & Shock Qualification Data Request

[aayush.aneja]

We are currently evaluating the VL53L9CX 3D dToF sensor for our next-generation product line.

Our product is mounted on a machine and subjected to continuous vibration.

While reviewing available documentation, we noticed characterization data and community discussions regarding shock/vibration tolerance for older generations like the VL53L1 and VL53L5 series. However, given that the VL53L9CX uses a different optical stack, we want to ensure its structural integrity and alignment stability under heavy mechanical stress.

Could someone from ST or the community share:

1. Vibration & Shock Qualification Data: Are there published test reports or datasheet parameters for mechanical shock (g-force/duration) and random vibration (sine/PSD profile limits) for the VL53L9CX?

2. Optical Alignment / Micro-movement Sensitivity: Has ST evaluated whether high-frequency mechanical vibration causes optical misalignment or ranging artifacts in the MOE array setup during operation?

3. Mounting Best Practices: Are there specific PCB layout or potting/housing guidelines recommended for industrial environments?

Any application notes or internal testing insights would be greatly appreciated as we make our design-in decisions.

[MeganeG]

Hello ​@aayush.aneja,

1. We will be publishing the reliability report on st.com soon, which should answer your questions.
2. The optics and lens are already integrated into the module.
3. The datasheet DS14879 (link) provides some recommendations, including PCB guidelines (section 2.9), Thermal characteristics (section 6), Handling, moisture and reflow precautions (section 12).

Let us know if this helps or if you need any further information.

Thanks, Megane