TMD27713 Sensors, Transducers

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Optical sensors, which detect and measure visible, infrared (IR), and ultraviolet (UV) radiation, have numerous applications. The TMD27713 is one such optical sensor that belongs to the ambient light, IR, and UV sensor family. It is a miniature, digital ambient light and IR intensity monolithic sensor that features an oxide-semiconductor process-based, low-power, digital light-to-digital 16-bit readings, a wide optical dynamic range, an integrated visible and IR blocking filter, and a wide supply voltage range.

The TMD27713\'s primary application is the detection of ambient light and IR radiation. It features an ambient light sensing (ALS) mode as well as an IR-only mode for applications requiring increased sensitivity or background illumination cancellation. Additionally, the device\'s 17-bit word resolution enables the sensing of very low light intensities to produce accurate readings while consuming very little power by operating at a supply voltage as low as 1.8V.

The TMD27713 features a 2x2x 0.65mm, 4-pin SMD package with a single channel digital output that can be directly interfaced with a microcontroller. It is a low-noise sensor that allows the user to turn on/off the digital operation. The digital output typically requires just 4ms for the ALS operation and 6ms for the IR-only operation to complete. The single-supplied device is also very versatile in its power consumption, able to operate between 1.8-3.6V while in standby mode and consuming only 2μA.

The TMD27713\'s ambient light sensing (ALS) mode and IR-only mode operate on different principles. In the ALS mode, the device senses visible light as well as IR radiation, making it suitable for ambient light measurement applications such as LED backlighting control, smart-phone display control, laptop displays, or for detection of indoor and outdoor lighting levels. In the ALS mode, the photodiode connected to the TMD27713 converts incident light energy into current that is then converted into a digital output.

The IR-only mode is best suited for applications where high sensitivity and low power consumption are key, such as TVs, motion detection, and security systems. In this mode, only the IR light is detected by the device, as the visible light is completely blocked by the built-in bandpass filter. The IR and visible light are then separated from each other using a bandpass filter. The IR component is then converted into a digital output and forwarded to the microcontroller.

In conclusion, the TMD27713 digital ambient light and IR intensity monolithic sensor combines a wide optical dynamic range with an integrated visible and IR blocking filter to detect and measure visible, infrared (IR), and ultraviolet (UV) radiation with exceptional sensitivity. The device\'s ALS and IR-only modes enable wide application compatibility, while its low power consumption and micron-sized form factor make it ideal for space-constrained applications. With its 17-bit word resolution, the TMD27713 is a powerful yet tiny optical sensor that is suitable for a variety of sensing applications.

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