TSL2671 datasheet(2/45 Pages) OSRAM

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[v1-00] 2016-Jul-12

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TSL2671

Digital Proximity Detector

The TSL2671 family of devices provides a complete proximity

detection system and digital interface logic in a single 6-pin

package. The device includes a digital proximity sensor with

integrated LED driver for the required external IR LED. The

proximity function offers a wide range of performance, with

four programmable LED drive currents and a pulse repetition

range of 1 to 32 pulses. The proximity detection circuitry

compensates for ambient light, allowing it to operate in

environments ranging from bright sunlight to dark rooms. This

wide dynamic range also allows operation in short-distance

detection applications behind dark glass, such as cell phones.

An internal state machine provides the ability to put the device

into a low-power mode for very low average power

consumption.

The proximity function specifically targets near-field proximity

applications. In cell phones, for example, the proximity

detection function can detect when the user positions the

phone close to their ear. The device is fast enough to provide

proximity information at the high repetition rate needed when

answering a phone call. This provides both improved green

power saving capability and the added security to lock the

screen when the user may accidently deploy a touch.

Communication with the device is accomplished through a

simple two-wire I²C interface with data rates up to 400 kHz. An

interrupt output pin is provided for connection to the host

processor. This interrupt pin can be used to eliminate the need

to poll the device on a repetitive basis. There is also a digital

filter that compares the proximity ADC results to programmed

values so that an interrupt is generated only upon a proximity

event.

The TSL2671 is supplied in a very small form factor

2 mm

× 2 mm, 6-pin optical package, requiring very little PCB

area. Also, the package height is only 0.65 mm high, which

makes the TSL2671 suitable for very thin mechanical

applications.

Ordering Information and Content Guide appear at end of

datasheet.

General Description

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