Light sensors reduce power consumption

Using a low power digital light sensor could help extend battery life for applications with power hungry displays. By automatically adjusting the dimming of a display based on the ambient light conditions, one can reduce the overall power consumption of the device. For this type of system, Intersil has great low power digital light sensors that allow access to information through a standard I²C interface. The ISL29010 and ISL29013 sensors measure and digitize the value of ambient light providing a simple way of integrating dynamic dimming into a device. These sensors are flexible and easy to use and allow you to choose the dynamic range and low-light sensitivity for your specific application. The supply current is 250µA however a power-down mode exists which only draws 1 µA. With some smart software control, these sensors can really make a difference in power consumption.

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