Mouser stocks ‘smallest’ light sensor from ams

Mouser Electronics is now stocking the TSL2584TSV light-to-digital converter, or ambient light sensor, from ams, which, at half the size of similar converter sensors is claimed to have the industry’s smallest footprint and height (1.14 × 1.66 × 0.32mm).

It can be used to create thinner wearable products, display backlights, keyboard illumination, and medical diagnostic equipment, says the distributor. The sensor’s through-silicon via (TSV) design eliminates wire bonds and provides a direct connection from the device’s I/Os to a solder ball.

The light-to-digital converter transforms light intensity into a digital signal output through a two-wire I²C interface capable of data transfer rates of up to 400kbit/s. The sensor combines a broadband visible plus IR photodiode, an IR-responding photodiode, and a photopic IR-blocking filter on a single CMOS IC. By filtering out unwanted IR light, the sensor can more accurately measure the ambient light. The near-photopic response produces an accurate lux measurement, even when mounted behind dark glass, says the company.

Two ADCs and programmable features such as analogue gain, integration time, upper and lower thresholds, and persistence filter are also integrated in the sensor. Moisture sensitivity level (MSL) 1 standard rating improves humidity temperature-cycling performance while minimising corrosion resistivity.

The low-power sensor operates from supply voltage of 3V, with a typical active current of 175µA, dropping to 3µA in sleep mode.

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