TSL2672EVM

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Evaluation boards are typically used to validate new designs and provide developers with the versatility and performance they need before integrating the device or technology within their actual application. The TSL2672EVM consists of an evaluation board and the environment-light sensor TSL2672R, primarily used for near ambient light measurements.

The TSL2672R has a spectral sensitivity band of 400nm- 600nm, with peak response at ~530 nm, as well as a linear response for total condensing power up to 8000 lux and a 13 bit effective resolution. It also has a wide range of programmable interrupt levels, allowing system microcontroller to act only when light level changes occur, therefore optimizing power use in electrically-sensitive applications. The TSL2672EVM addresses several application fields such as notebooks, LCDs, backlights, proximity sense, medical equipment, light-sensing-equipped household appliances and office equipment.

When used in combination with the TSL2672EVM evaluation board, the TSL2672R can be programmed to sample and read ambient light values at any desired speed, once set, the maximum frequency is 67kHz. In addition, it can be programmed to alert the microcontroller about light changes, and it has a built-in ambient light rejection feature which will help reject interference from sunlight and highly bright artificial light sources.

The TSL2672EVM provides a regulated supply voltage of 5V and 3V, signals for programming and data logging, as well as traditional evaluation boards components such as buttons, LEDs and connectors for external IR proximity sensor. As a result, the TSL2672EVM enables engineers to test the capabilities of the TSL2672R quickly and accurately. Inside the TSL2672EVM there are a few components used to measure the light data inputted. These components and their uses are as follows:

• The evaluation board includes a light sensor, two amplifiers, a comparator, a filter and an analog-to-digital converter. The light sensor converts ambient light to a voltage.
• The first operational amplifier (op-amp) used is a differential amplifier with two active filter gain control pins. This op-amp isolates the ambient light and gain from ambient light.
• The second op-amp is used as a band-pass filter to remove any DC components and noise from the light signal. This reduces the noise of the signal and allows for accurate measurements.
• The comparator is then used to compare the filtered light signal to a reference voltage. It will then output digital logic level, either high or low, depending on the comparison. This digital output is used for control or further processing.
• An ADC is then used to convert the digital output from the comparator to a digital format. This allows for easy storage and further comparison.

The TSL2672EVM is an important tool for product developers and designers since it provides a way for them to quickly measure the luminosity of the environment. Furthermore, the evaluation board also provides the possibility for developers and designers to quickly troubleshoot any possible side effects of the integration. This is done by providing a constant supply of power to the light sensor and allowing the designer to measure the luminosity of specific points in the ambient.

Using the TSL2672EVM, designers and product developers can establish the threshold of light intensity to set the proper brightness of a device. This helps achieve energy efficiency at the same time while making sure the user has a comfortable experience. For example, in a laptop or mobile device, the light sensor can be used to detect the ambient light level and set the brightness of the display accordingly. This can also be used for proximity sensors to detect the brightness of the environment and react accordingly.

In summary, the TSL2672EVM is a great tool to measure ambient light. Its combination of the evaluation board and environment-light sensor TSL2672R offers developers and designers the flexibility and performance they need before integrating the device or technology within their actual application. The TSL2672EVM provides a regulated supply voltage, signals for programming and data logging, as well as traditional evaluation boards components like buttons and LEDs. This makes it easy for developers and product designers to measure light data inputted and quickly establish the threshold of light intensity.

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