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OPT101 Analog Light Intensity Sensor Module

The OPT101 is a monolithic photodiode with on-chip transimpedance amplifier. The integrated combination of photodiode and transimpedance amplifier on a single chip eliminates the problems commonly encountered in discrete designs, such as leakage current errors, noise pick-up, and gain peaking as a result of stray capacitance. Output voltage increases linearly with light intensity. The amplifier is designed for single or dual power-supply operation.


  • VCC: power supply positive pin
  • -V: negative supply
  • -IN: the inverting input of the internal op amp and the negative of the internal photodiode,
  • Do not connect or apply feedback that is abandoned in the operation
  • 1M: Internal 1MΩ feedback resistor input
  • OUT: Amplifier output
  • COM: Internal photodiode positive, generally connected to GND


  • 1 x OPT101 Analog Light Intensity Sensor Module
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