Detecting light like a human eye, the MAX44000 from Maxim Integrated Products houses three optical sensors, two analog-to-digital converters (ADCs), and digital functionality in a compact device. Power consumption is 5 µA when the ambient sensor is enabled and 7 µA when both the proximity sensor and ambient light sensor are activated. According to the company, this efficiency makes the MAX44000 ideal for touchscreen applications in smart phones and other portable devices for presence detection—turning off the touchscreen, for example, when users hold the smart phone to their ear to carry on a conversation. Offered in a six-pin UTDFN-Opto-EP package measuring 2 by 2 by 0.6 mm, the MAX44000 starts at $1.65 each in quantities of 1000. More information is available at To peruse a datasheet, go to

Maxim Integrated Products