DATASHEET
ISL29011 FN6467
Rev 6.00
May 1, 2014 Digital Ambient Light Sensor and Proximity Sensor with Interrupt Function
The ISL29011 is an integrated ambient and infrared
light-to-digital converter with a built-in IR LED driver and I2C
Interface (SMBus Compatible). This device provides not only
ambient light sensing to allow robust backlight/display brightness
control but also infrared sensing to allow proximity estimation
featured with interrupt function.
For ambient light sensing, an internal ADC has been designed
based on the charge-balancing A/D conversion technique. The
ADC conversion time is nominally 90ms and is user adjustable
from 11Вµs to 90ms, depending on oscillator frequency and ADC
resolution. This ADC is capable of rejecting 50Hz and 60Hz flicker
noise caused by artificial light sources. The lux-range-select
feature allows users to program the lux range for optimized
counts/lux.
For proximity sensing, the ADC is used to digitize the output signal
from the photodiode array when the internal IR LED driver is
turned on and off for the programmed time periods under
user-selected modulation frequency to drive the external IR LED.
As this proximity sensor employs a noise cancellation scheme to …