OPT101: OPT101

Dilip Ramesh

Part Number: OPT101

Hello,

Would like to know the Short circuit current linearity of OPT101 will be able to measure at 340nm. For our application we are looking the intesity upto 10^-14 lx and expect about 10 piccoampere for that intensity

over 3 years ago

0 Alex Bhandari-Young over 3 years ago

TI__Mastermind 25815 points

Hi,

Linearity is spec'd for device voltage output. Can you clarify here?

Best,

Alex

0 Dilip Ramesh over 3 years ago in reply to Alex Bhandari-Young

Prodigy 20 points

Hello ,

0 Dilip Ramesh over 3 years ago in reply to Dilip Ramesh

Prodigy 20 points

Sorry for delay in response, My query was actually to understand if the output of the photodiode is linear upto 1 picoampere ie., can it measure the light intensity less than 10^-12 watts/M^2 intensity

+1 Alex Bhandari-Young over 3 years ago in reply to Dilip Ramesh

TI__Mastermind 25815 points

Hi Dilip,

The datasheet indicates: "The photodiode is operated in the photoconductive mode so the current output of the photodiode is very linear with radiant power throughout a wide range. Nonlinearity remains less than approximately 0.05% for photodiode currents less than 100-μA." However this is a very low light level and we do not have data down to this level so I am not able to say if this will be the case at this low of a light level.

Best,

Alex

0 Alex Bhandari-Young over 3 years ago in reply to Alex Bhandari-Young

TI__Mastermind 25815 points

Hi Dilip,

The dark current of this device is 2.5pA and will also increase with temperature as stated in the datasheet. This would be a major source of error with such low light levels and result in bad linearity.

Best,

Alex

0 Dilip Ramesh over 3 years ago in reply to Alex Bhandari-Young

Prodigy 20 points

Ok Thank you

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OPT101: OPT101