Renesas / Intersil ISL29035 Digital Light Sensor is an integrated ambient and infrared light-to-digital converter with I²C (SMBus compatible) interface. The advanced self-calibrated photodiode array of this Intersil device emulates human eye response with excellent IR rejection. The on-chip analog-to-digital converter is capable of rejecting 50Hz and 60Hz flicker caused by artificial light sources. The Lux range select feature allows users to program the Lux range for optimized counts/Lux. For ambient light sensing, an internal 16-bit ADC has been designed based upon the charge-balancing technique. The ADC conversion time is nominally 90ms and is user adjustable from 11µs to 90ms, depending on oscillator frequency and ADC resolution. In normal operation, typical current consumption is 57µA. Two power-down modes are provided to further minimize power consumption. If polling is chosen over continuous measurement of light, the auto-power-down function shuts down the whole chip after each ADC conversion for the measurement. The other power-down mode is controlled by software via the I²C interface. The power consumption can be reduced to less than 0.3µA when powered down. ISL29035 is specified for operation over the -40°C to +85°C ambient temperature range.

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