SI1141-M01-GM

The SI1141-M01-GM is a part of the family of ambient light, infrared, and ultraviolet (UV) sensors produced by Silicon Labs. The sensor is designed to measure light-source intensity in lux and also has an integrated angular-independent dark current trace capability. It offers excellent signal-to-noise ration and low power consumption, ensuring a reliable measurement performance in a variety of applications across several industries.

The SI1141-M01-GM has two optical channels; a visible/NIR LED channel and an infrared/UV LED channel. The visible/NIR LED channel provides measurements from 100 to 8010 lux across three selectable gain ranges, while the infrared/UV range delivers a linear output between -10 and +240 mV/lux across four selectable gain settings.

The device includes an integrated micro-optical blocker to reject automatically reflected light from entering the device, making the SI1141-M01-GM an ideal choice for any application requiring accurate light measurements without having to consider external interference. The lower noise and wider dynamic range also allow the SI1141-M01-GM to perform better than most standalone optical sensors in harsh and fluctuating lighting conditions.

The device features a ground pin for easy connection to the ground plane, and an internal temperature sensor to monitor device stability. There is also a sleep mode for power-saving applications. The device’s I2C interface can be programmed to select any of the gain settings and can communicate at speeds up to 400kHz. It can also be configured to switch the LED channel on and off via I2C.

The SI1141-M01-GM sensor is most commonly used in touchscreens, optical communications, proximity sensing and gesture recognition applications, which require an ambient light or infrared/UV sensing design. The SI1141-M01-GM also finds applications in medical devices, appliances, ambient lighting control, energy-saving systems, automotive systems, mobile phones, and industrial zones.

The working principle of the SI1141-M01-GM sensor is rooted in its dual-channel design. The sensor is equipped with both a visible/NIR channel and an infrared/UV channel, both of which measure light intensity and convert it into usable data. The visible/NIR LED channel responsible for measuring light from 100 to 8010 lux while the infrared/UV LED channel measures a linear output from -10 to +240 mV/lux. A photodiode then measures the amount of light falling on it and converts it into an electrical signal. This signal is amplified using an integrated amplifier and converted to a digital value by an analog-to-digital converter. The sensor then communicates its measurement data to the system microcontroller using an I2C interface.

The SI1141-M01-GM sensor offers excellent signal-to-noise ratio and low power consumption, making it well-suited for applications in various industries. Its integrated micro-optical blocker prevents reflected light from entering the device, while its internal temperature sensor ensures device stability. The sensor’s dual-channel design allows it to accurately measure ambient light as well as infrared/UV light intensities, making it a great choice for applications requiring accurate light measurements.