User Guide

TSL25911FN Ambient Light Sensor
SKU: CQRTSL25911, ASIN: B083KM51DF
Description
AMS' TSL2591 device series provides a wide 600M:1 dynamic range, up to 88,000 lux (bright
sunlight), which improves design flexibility and provides engineers with ambient light sensors and a
variety of non-display performance display applications.
TSL2591 is an ultra-high sensitivity optical digital converter that can convert light intensity into digital
signal output with a direct I 2 C interface. The device integrates a broadband photodiode (visible light
and infrared light) and an infrared response photodiode on a single CMOS integrated circuit. Two
integrating ADCs convert the photodiode current into a digital output, which represents the irradiance
measured on each channel. This digital output can be input to a microprocessor, where an empirical
formula is used to derive the brightness (ambient light level) in lux to approximate the response of the
human eye. TSL2591 supports traditional level-style interrupts and remains valid until the firmware
is cleared.
The ambient light sensor can sense the surrounding light conditions and tell the processing chip to
automatically adjust the brightness of the display backlight to reduce the power consumption of the
product. For example, in handheld applications such as mobile phones, notebooks, GPS and other
mobile devices, the display consumes up to 30% of the total battery power, and the use of ambient
light sensors can maximize the battery's working time.
CQRTSL25911 Ambient light sensor integrates TSL25911FN chip, measures infrared plus visible light
(wider range than TSL2561), features 600M: 1 wide dynamic range, Detects Light Intensity up to
88000Lux (Bright Sunlight), Controlled via I2C Interface, low power consumption. It is capable of
operating across various light environment. Onboard voltage translator, compatible with 3.3V/5V
operating voltage, Compatible with Raspberry Pi, Arduino, STM32 and other motherboards.