Product Specification

The WH77140UC is a light to digital converter which combines an advanced ambient light sensor, an advanced proximity sensor and a high efficiency infra light LED. The pitch of sensor and LED is only 1.45mm, so it is suitable for small IR hole design.

Ambient light sensor (ALS) built-in an optical filter for IR rejection, and providing a spectrum which is close to the human eye's response. ALS can work from dark to direct sunlight, the selectable detect range is about 40dB. ALS has excellent light ratio under different light conditions.
Proximity sensor (PS)built-in an 940nm optical filter for ambient light immunity, so PS can detect reflected IR light with high precision and excellent rejection.
WH77140UC has programmable interrupt function for ALS and PS with threshold based hysteresis

Features：

>IC interface (Fast Speed Mode at 400kHz/s)
>Supply voltage range from 2.4V to 3.6V
>Operating temperature from -40°C to +85°C
>Ambient Light Sensor
-Spectral close to human eye response.
-Fluorescent light flicker immunity
-Selectable gain and resolution (up to 16-bit)
-High sensitivity and wide detect range.
-High accuracy of illuminance & light ratio.
>Proximity Sensor
-Ambient light immunity
-Selectable gain and resolution (up to 12-bit)
-Programmable PWM and LED current.
-Intelligent crosstalk calibration.
-Speed mode for response time lmprovement.

Applications:

Handset device Mobile phone, tablet, PDA, mobile POS
Consumer device LCD TV, digital camera, toy
Computing device Laptop, LCD monitor