Ultra Low Power Light Recognition System Application Circuit for Smart Agriculture

CN-0397: Application Circuit uses 3-photodiodes that are sensitive to different wavelengths (red, green and blue), to measure light intensity levels over the light spectrum where plants are photosynthetically active. The measured results can be used to optimize the light source to match the requirements of the specific plants, enhance the growth rate and minimize energy losses. This circuit uses three precision current to voltage conversion stages that drive a single-supply, low power, low noise, 16-bit, delta sigma analog-to-digital converter (ADC) with three differential inputs