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Is there any current sensor capable of sense very low current ranges from 0nA to 250nA? I would need to sense the current produced by this photodiode: GVGR-S11SD (http://www.geni-uv.com/download/products/GVGR-S11SD.pdf) (http://www.roithner-laser.com/datasheets/pd/uv/gvgr-s11sd.pdf) Maybe this requires an amp? (https://www.analog.com/media/en/technical-documentation/tech-articles/Optimizing-Precision-Photodiode-Sensor-Circuit-Design-MS-2624.pdf)

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    \$\begingroup\$ What bandwidth is your light signal? What accuracy are you expecting? \$\endgroup\$
    – Andy aka
    Jan 8, 2021 at 16:57
  • \$\begingroup\$ Obviously the answer is "yes" otherwise it's unlikely that this photodiode would exist. You may, of course, have to design and build your own in order to meet your own requirments. \$\endgroup\$
    – jwh20
    Jan 8, 2021 at 17:12
  • \$\begingroup\$ Obligatory: electronicdesign.com/technologies/test-measurement/article/… from Bob Pease, one of the greats \$\endgroup\$
    – pjc50
    Jan 8, 2021 at 17:21
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    \$\begingroup\$ I'm not talking about the spectral bandwidth but your signal bandwidth. As "accurate as possible" is NOT helpful. You have to create an error budget for these things. The resolution of your ADC is unimportant. Error budget is what you need to consider. Be scientific or you'll not achieve what you really need to achieve - I can't guess that for you. Signal bandwidth is vital to know. \$\endgroup\$
    – Andy aka
    Jan 8, 2021 at 18:12
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    \$\begingroup\$ "Maybe this requires an amp" - yes it does. google "photodiode transimpedance amplifier" \$\endgroup\$
    – Pete W
    Jan 8, 2021 at 20:21

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