Proximity Light Sensor Chip - WH APS 77140UC

Proximity Light Sensor Chip - WH77140UC is a light-to-digital converter that combines an ambient light sensor, a proximity sensor, and a high-efficiency infrared LED. The distance between the sensor and LED is only 1.45mm, making it suitable for 1R small aperture designs. The Ambient Light Sensor (ALS) has a built-in IR filter, providing a spectral response close to the human eye. The ALS can operate from darkness to direct sunlight with a selectable detection range of approximately 40dB. It has good light ratio under different lighting conditions.

The Proximity Sensor (PS) has a built-in 940nm filter for ambient light immunity, so the PS can detect reflected IR light with high accuracy and excellent immunity. The WH77140UC features programmable interrupt with threshold-based hysteresis for both ALS and PS.

I. Features of Distance Sensor Chip - WH APS 77140UC:

I2C interface (high-speed mode up to 400kHz/s)

Supply voltage range: 2.4V ~ 3.6V

Operating temperature: -40°C to +85°C

Ambient Light Sensor:

Spectral response close to human eye

Anti-flicker against fluorescent lamps

Selectable gain and resolution (up to 16-bit)

High sensitivity, wide detection range

High accuracy of light ratio

Proximity Sensor:

Ambient light immunity

Selectable gain and resolution (up to 12-bit)

Programmable PWM and LED current

Smart crosstalk calibration

Speed mode for improved response time

II. Applications of Distance Sensor Chip - WH APS 77140UC：

Mobile devices: smartphones, tablets, PDAs, mobile POS terminals

Consumer devices: LCD TVs, digital cameras, toys

Computing devices: laptops, LCD monitors