The LX1973A internal circuitry consists of a diode array with Microsemi's Best EyeTM processing that provides a nearly perfect photopic light wavelength response curve. The sensor output feeds into a wide dynamic range compression amplifier that provides accurate resolution over five decades of ambient light. The integrated dark current cancellation circuit facilitates accurate sensing of light below 0.01 lux. The current source output of the LX1973A can be gain scaled using one external resistor.