TCS37715FN datasheet(19/49 Pages) OSRAM

部件名	TCS37715FN

功能描述	Color Light-To-Digital Converter with Proximity Sensing

PDF	49 Pages

Scroll/Zoom	100%

制造商	OSRAM [OSRAM GmbH]

网页	http://www.osram.com

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Page 18

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[v1-31] 2018-Apr-04

TCS3771 − Principles of Operation

Proximity Detection

Proximity sensing uses an external light source (generally an

infrared emitter) to emit light, which is then viewed by the

integrated light detector to measure the amount of reflected

light when an object is in the light path (Figure 21). The amount

of light detected from a reflected surface can then be used to

determine an object’s proximity to the sensor.

Figure 21:

Proximity Detection

The TCS3771 has controls for the number of IR pulses

(PPCOUNT ), the integration time (PTIME), the LED drive current

(PDRIVE) and the photodiode configuration (PDIODE). The

photodiode configuration can be set to red diode

(recommended), clear diode, or a combination of both diodes.

At the end of the integration cycle, the results are latched into

the proximity data (PDATA) register.

Figure 22:

Proximity Detection Operation

TCS37715FN 数据表(PDF) 19 Page - OSRAM GmbH