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| ISL29125數(shù)字RGB彩色光傳感器解決方案 |
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| 文章來源： 更新時間：2014/3/20 10:13:00 |
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Intersil公司的ISL29125是集成了IR阻塞濾波器的數(shù)字RGB彩色光傳感器,具有低功耗,高靈敏度和I2C(SMBus兼容)接口, 工作電流56μA,關(guān)斷電流0.5μA ,工作電壓2.25到 3.63V,主要用在智能手機,PDA,GPS,平板電腦,LCD TV,數(shù)碼相框,數(shù)碼相機,打印機色彩增強,工業(yè)/商用LED照明色彩管理,環(huán)境光色彩檢測/修正以及OLED顯示器老化補償.本文介紹了ISL29125主要特性,框圖,典型應(yīng)用電路以及RGB評估板電路圖,材料清單,PCB元件布局圖.
The ISL29125 is a low power, high sensitivity, RED, GREEN, and BLUE color light sensor (RGB) with an I2C (SMBus compatible) interface. Its state-of-the-art photodiode array provides an accurate RGB spectral response and excellent light source to light source variation (LS2LS). The ISL29125 is designed to reject IR in light sources allowing the device to operate in environments from sunlight to dark rooms. The integrating ADC rejects 50Hz and 60Hz flicker caused by artificial light sources. A selectable range allows the user to optimize sensitivity suitable for the specific application. In normal operation mode the device consumes 56μA which reduces to 0.5μA in power down mode. The ISL29125 supports hardware and software user programmable interrupt thresholds. The Interrupt persistency feature reduces false trigger notification. The device operates on supplies (VDD) from 2.25V to 3.63V, I2C supply from 1.7V to 3.63V, and operating temperature over the -40℃ to +85℃.
ISL29125主要特性:
• 56μA operating current, 0.5μA shutdown current
• Selectable range (Via I2C)
• I2C (SMBus compatible) output
• ADC resolution 16 bits
• Programmable interrupt windows
• Two optical sensitivity ranges
- Range 0 = 5.7m lux to 375 lux
- Range 1 = 0.152 lux to 10,000 lux
• Operating power supply 2.25 to 3.63V
• I2C power supply 1.7V to 3.63V
• 6 Ld ODFN (1.65x1.65x0.7mm) package
ISL29125應(yīng)用:
• Smart phone, PDA, GPS, tablet PCs, LCD-TVs, digital picture frames, digital cameras
• Dynamic display color balancing
• Printer color enhancement
• Industrial/commercial LED lighting color management
• Ambient light color detection/correction
• OLED display aging compensation
圖1. ISL29125框圖
圖2. ISL29125典型應(yīng)用框圖
RGB評估板
The RGB Evaluation Kit is designed to evaluate the performance of the RGB sensor. The kit is accompanied by a graphical user interface (GUI) that contains the CIE 1931 Chromaticity diagram with Planckian locus in an x, y- coordinate system, with cross marks to point out where the RGB sensor position is on the graph. The GUI facilitates evaluation of parameters such as raw data of Red, Green and Blue as well as X, Y and Z corrected lux measurements and also performs interrupt functions. Data can be viewed on the GUI and/or saved to a text file for future analysis. The GUI software is compatible with Windows XP®, Windows Vista®, and Windows® 7. This provides a simple user interface for exercising the device features.
The system (MCU, DUT) is powered directly from the universal serial bus (USB) or from a single-supply voltage of 2.25V to 3.6V. The evaluation board must be connected to a computer through the mini USB port for the system to function. The system uses a USB MCU to communicate to the DUT via I2C/SMBus interface.
圖3.RGB評估板外形圖
圖4.RGB評估板電路圖
RGB評估板材料清單:
圖5.RGB評估板PCB布局圖
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