RE: 52810 WLCSP Light Sensitive

Andreas — Mon, 04 Jun 2018 08:31:26 GMT

Hi Youqun,

The nRF52810 should have a top-side coating that shields it from light exposure from the top, the sides are still exposed and should be covered by some epoxy-like material if needed. The chip is sensitive to IR light, as silicon is translucent to these wavelengths.

The chip should not take damage. There will be current-increase in some low-power modules, and perhaps most significantly the 32kHz RCOSC will be less accurate or even unstable, depending on the amount of light exposure. If a product is used in sun/strong IR light exposure, customers might want to consider 32kHz crystal or using a shielding enclosure. Sleep currents might increase a little, but the chip will be functional as opposed to the nRF51 where the radio started drifting if exposed to light.

Best regards,

Andreas