OPT3001: IR frequency response

Stepan Sigut

Part Number: OPT3001
Other Parts Discussed in Thread: OPT3004

According to the datasheet OPT3001 should match human eye frequency response. I designed a board using OPT3001 with IR LED from OSRAM (SFH 4770). OPT3001 is used for sensing if there is enough visible light to switch on/off IR LED for security camera. However when IR LED is turned on the OPT3001 immediately return numbers about 3500 lux whereas with LED off it is reporting 300 lux. From what I see frequency response is nowhere near the advertised in datasheet (LED is 850nm). Is there anything I need to configure in the driver to change the frequency response to reject IR light?

Thank you in advance.
Stepan

over 5 years ago

0 Alex Bhandari-Young over 5 years ago

TI__Mastermind 25845 points

Hi Stepan,

We have found that security cameras with IR LEDs have a unique requirement for IR rejection at angles due to IR light bouncing off the glass dome. For this reason we released OPT3004. I would suggest switching to test with OPT3004. OPT3001 does perform to the datasheet spec, but you'll see OPT3004 has additional IR spec over many more angles of incidence added to the datasheet.

Best,

Alex

0 Stepan Sigut over 5 years ago in reply to Alex Bhandari-Young

Prodigy 30 points

Unfortunately I did not found OPT3004 originally when searching for the sensors. I will test with OPT3004 for next board respin. Thank you for suggestion.

Best Regards

Stepan

0 Alex Bhandari-Young over 5 years ago in reply to Stepan Sigut

TI__Mastermind 25845 points

Stepan,

Sounds good. Please let me know if you have any suggestions for making OPT3004 more visible so you could have found during your initial search.

Best,

Alex

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OPT3001: IR frequency response