SFH7779 datasheet(4/35 Pages) OSRAM

4 / 35 page

2016-04-25

Version 1.2

SFH 7779

Measurement modes



DD exceeds the threshold voltage, the sensor will switch from OFF mode to STAND-BY mode. As

shown in the transition-diagram above it is possible to switch between all modes without any restriction.



Mode

Description

OFF

The device is inactive. Other units may use the I2C bus without any restrictions; I/O

pins and INT are in high Z state. There is no sink current through the LED

STAND-BY

This is the initial mode after power-up. IDD is typ. 0.8A. No measurement is

performed. Device can be activated by I2C bus communication. Data registers can

be read and written.

ALS / PS free -

RUNNING

Measurements are triggered internally by the SFH 7779. Stand-by / active mode for

ALS and PS, measurement times, interrupt options and LED current can be adjusted

via I²C register. Measurement results can be read from the data register, the status

from the interrupt register.

STAND-BY

OFF

Proximity Sensor (PS)

and

Ambient Light Sensor (ALS)

free - RUNNING

Proximity Sensor (PS)

free - RUNNING

Ambient Light Sensor (ALS)

free - RUNNING

SFH7779 数据表(PDF) 4 Page - OSRAM GmbH