OPT4048 컬러 센서 -I2C
(COLOR 17 CLICK)
개요
- 본 제품은 OPT4048 컬러 센서 -I2C입니다.
- OPT4048 칩을 기반으로 디자인된 제품으로 CIE XYZ 컬러 스페이스 센싱 채널을 가지고 있는 제품입니다.
- I2C 인터페이스를 가지고 있습니다.
특징
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HOW DOES IT WORK?
Color 17 Click is based on the OPT4048, a high-speed precision tristimulus XYZ color sensor from Texas Instruments, designed to mimic the human eye's normal vision. The human eye has spectral sensitivity in a range of short, middle, and long wavelengths but in a correlation with a range of brightness. The CIE XYZ color space represents all color sensations visible to an average human eye, where the X is a mix of the three CIE RGB curves, the Y is the illuminance, and the Z is a quasi-equal to blue, according to the CIE 1931 model. The CIE XYZ is fixed color space, and one must note that there is a difference between the objects that emits light (and color) and objects that reflect light (and color). To put it more clearly, the monitor you look at and the wall behind it.
The OPT4048 has three channels closely matching the CIE tristimulus spectra and a fourth with a wide-band spectral response. Measures from these channels give us the characteristics of the lighting environment, such as the light intensity, color, LUV coordinates, and correlated color temperature. While closely mimicking the human eye, the OPT4084 rejects the wavelengths from their peaks, especially the NIR region (infrared) that the human eye does not see, which is a crucial part of this sensor.
To achieve excellent filter performance even at higher angles of light incidence, the OPT4084 uses advanced filter technology, high-resolution color measurements, and built-in automatic full-scale light range selection logic. By default, the OPT4048 is configured to operate in an automatic full-scale range detection mode that always selects the best full-scale range setting for the given lighting conditions. There are seven full-scale range settings, one of which can also be selected manually. Setting the device to operate in automatic full-scale range detection mode frees the user from having to program their software for potential iterative cycles of measurement and readjustment of the full-scale range until good for any given measurement. It also shows excellent linearity over the entire 26-bit dynamic range of measurement from 2.15mlux up to 144klux, with a highly linear response within each range.
The Color 17 Click uses an I2C 2-Wire interface supporting a Fast mode of up to 400KHz, and I2C burst mode to communicate with the host MCU. The I2C address can be selected via the ADDR SEL jumper with 0 selected by default. The sensor has several modes of operation: Power-Down mode, Continuous mode as a normal mode of operation, and a one-shot mode in which the sensor can be triggered to work depending on the user setup. One of the triggers can be the interrupt functionality, where the INT pin is used for hardware-synchronized triggers and interrupts. The OPT4084 features a threshold detection logic that allows MCU to sleep or do other things while the sensor watches when an appropriate interrupt event occurs.
This Click board™ can only be operated with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Optical Applications Can be used for the development of applications for camera image correction, auto white balancing, lighting control systems, building automation and control, or general display brightness and color adjustments On-board modules OPT4048 - high-speed precision tristimulus XYZ color sensor from Texas Instruments Key Features Four channels for close mimic of the human eye spectra, high precision and resolution, built-in automatic full-scale light range selection, configurable conversion times, reject the NIR region, interrupt and hardware synchronized triggers, low power consumption, and more Interface I2C Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V