Converts light level to frequency Wide dynamic range: 5 orders of magnitude Excellent linearity Output timing reset function Digital output for direct interface to microcontroller 4-pin plastic package.
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Light-to-frequency converter photo IC
S9705 series
Converts light level to frequency of output pulse
The S9705 and S9705-01DT are photo ICs that combine a photodiode and a current-to-frequency converter on a CMOS chip. Output is a square wave (50% duty ratio) with frequency directly proportional to light level incident on the photodiode. The CMOS level digital output allows direct connection to a microcontroller or other logic circuitry. The S9705 series has wide dynamic range and light level can be easily measured when used with a digital counter.
S9705 Datasheet
