OPT3002: Conversion time definition

Hideki Hayashi1

Part Number: OPT3002

Tool/software:

Hi team,

Conversion time is 100ms. Does it mean the average luminance during 100ms is stored in the register or does it mean luminance reading is occured in every 100ms?

Best regards,

Hayashi

11 months ago

+1 Daniel Balmaceda 11 months ago

TI__Expert 4270 points

Hello Hideki,

This spec means that new lux readings occur every 100 ms.

Thank you,

Daniel Balmaceda

0 Hideki Hayashi1 9 months ago in reply to Daniel Balmaceda

TI__Expert 8380 points

Hi Daniel,

I understand that OPT3002 store the "instanteneous" lux reading in every 100ms.

But the datasheet shows below, is it summarizing the data until 100ms (or 800ms)?

Best regards,

Hayashi

0 Daniel Balmaceda 9 months ago in reply to Hideki Hayashi1

TI__Expert 4270 points

Hi Hayashi,

I believe I misinterpreted your original question. Just to clarify, you are asking whether the sensor outputs an instantaneous measurement every 100ms or if it averages the light level over 100ms, is this correct? If so, I would need to verify which approach it takes.

What is the application for this? Does the customer need a faster conversion time?

Thanks,
Daniel Balmaceda

0 Hideki Hayashi1 9 months ago in reply to Daniel Balmaceda

TI__Expert 8380 points

Hi Daniel,

Daniel Balmaceda said:
whether the sensor outputs an instantaneous measurement every 100ms or if it averages the light level over 100ms, is this correct?

Yes that is my question.

Application is video doorbell, the sensor must detection day/night just after the system wake up from sleep. So they need faster conversion time.

Regards,

Hayashi

0 Daniel Balmaceda 9 months ago in reply to Hideki Hayashi1

TI__Expert 4270 points

Hi Hayashi,

Thanks for clarifying. The measurement result is integrated over the 100/800ms so it is not possible for the OPT3002 to give a faster result. What conversion time is the customer looking for?

Thanks,

Daniel

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OPT3002: Conversion time definition