Product Introduction
The WH81120UF is a light-to-digital converter that combines a photodiode, current amplifier, analog circuits, and a digital signal processor.
The ambient light sensor (ALS) has a built-in filter that suppresses the infrared spectrum and provides a spectrum close to the human eye response. ALS can detect from darkness to direct sunlight, with a selectable detection range of approximately 40 dB. Dual-channel output (human eye), thus providing a good light ratio under different light conditions. ALS has a good light ratio under different lighting conditions.
The WH81120UF has programmable interrupt functionality with high/low thresholds.
I.Ambient Light Sensor Chip -Features of WH81120UF:
Compact surface mount package 2.0x2.0x0.7mm
I2C interface (fast mode up to 400kHz/s)
Dedicated interrupt pin
Power supply voltage range from 1.7V to 3.6V
Operating temperature range from -40°C to +85°C
Light sensor
-Close to human eye response
-Supports up to 16-bit digital output
-Programmable dynamic range ratio = x1: x4: x16: x64: x256
-Linear output code for dynamic range selection
-Eliminates 50/60 Hz filter through programmable integration time
-Fluorescent flicker immunity
II.Ambient Light Sensor Chip -Applications of WH81120UF:
Backlight control for mobile phones and LCD displays
Laptop/monitor security
Automatic menu pop-up
Digital camera photometer
