Overview: APDS-9999
Digital Proximity and RGB Sensor Data Sheet Overview
The Broadcom® APDS-9999 is an integrated RGB, proximity detector and VCSEL in an optical module.
The APDS-9999 device uses four individual channels of red, green, blue, and IR in a specially designed matrix arrangement. This allows the device to have optimal angular response and accurate RGB spectral response with high Lux accuracy over various light sources. The device detects light intensity under a variety of lighting conditions and through a variety of attenuation materials, including dark glass. The APDS-9999 could be configured as ambient light sensor (ALS) and RGB sensor.
In smartphones, the proximity sensor senses when the user positions the phone close to the ear so that the touchscreen can be disabled. The device is fast enough to provide proximity information at a high repetition rate needed when answering a phone call.
The APDS-9999 has a wide dynamic range. The current is programmable in two steps. The number of VCSEL pulses can be configured using pulse step, and VCSEL modulation frequency can be set from 60 kHz to 100 kHz in five steps. PS resolution can be varied from 8 bits to 11 bits, and the measurement rate is from 6.25 ms to 400 ms. To offset unwanted reflected light from the cover glass, a PS intelligent cancellation level register allows for an on-chip subtraction of the ADC count contributed by any unwanted reflected light from cover glass.
Both the PS and ALS function independently allowing for maximum flexibility in application.
