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Digital ALS ICs reduces power consumption

Posted: 28 Feb 2011 ?? ?Print Version ?Bookmark and Share

Keywords:ambient-light? adaptive-gain block? power reduction?

Maxim Integrated Products introduced the MAX44007 and MAX44009 digital ambient-light sensor (ALS) ICs with an adaptive-gain block. The sensors can be used in tablet and notebook PCs, smartphones, TVs, digital lighting management systems and light-intensity monitoring. Designed using the company's proprietary BiCMOS technology, the ICs integrate two optical sensors, an ADC and digital functionality into a tiny 2 x 2 x 0.6mm package. The company claims that the ICs consume a hundred times less power than other ICs, extending battery life. Maxim's ALS ICs offer a unique interrupt function that constantly measures the amount of light and reports to the microcontroller when the measurement passes the threshold. This reduces the frequency of I2C communications.

The MAX44007 has a wide 0.025 to 104,444 Lux range, while the MAX44009 has a 0.045 to 188,000 Lux range. Both have a VCC of 1.7 to 3.6V and an operating current of 0.65? A, along with a temperature range of -40C to 85C.

The ICs are already available in the market, and pricing starts at $1.20 (1,000 up, FOB USA).

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