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ambient light sensor technology

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lhlblue

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hi, i want to design an ambient light sensor with analog output, that is photodiode+current amplifier, and the spectrum is human sensed, from 400nm to 700nm. peak=520nm, so i want to satisfy the following:
1, color filter or anti-reflection coating for 400nm-700nm spectrum, such as CIS process
2, have native or low-vt transistor

i want to know, what technology or which foundry can satisfy the above two requirements?

thanks.
 

KlausST

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Hi,

there are photodiodes "Adapted to human eye sensitivity (Vl)" --> BPW21 for example.

i´d use an transimpedance amplifier. --> wikipedia

Klaus
 

lhlblue

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hi, KlausST
i know what you said, but i need to design an ALS IC (photodiode + current amplifier) to provide a large output current, suc as, 100Lux illumination will output 100uA current, the similar type is Avago APDS-9005. so, i need the above metioned technology, and i need more ideas, thanks.
 

BradtheRad

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Led's produce voltage when exposed to light.

A yellow led is in the same range as human vision. I just tried an experiment. I find it can put out a few tenths of a volt in bright light. But very little current however, maybe 0.3 uA.
 

lhlblue

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thanks all.
i just want to know which technology or foundry can provide human-sensed coating or color filter for ambient light sensor,and at the same time, can provide native or Low-Vt MOS transistors. and 0.35um process is preferred here.
 

lhlblue

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can anyone give me some suggestions?
thanks.
 

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