OPT4048
- High precision, high speed color light-to-digital conversion over high speed I2C interface
- Four channel sensing using precision optical filters:
- XYZ tristimulus channels with close matching to CIE 1931 spectra with excellent IR rejection
- Clear wide bandwidth channel
- High resolution color measurement in CIE XY, LUV space, correlated color temperature (CCT) along with ambient lux measurement
- Semi-logarithmic output with 7 binary logarithmic full-scale light range and highly linear response within each range
- Built-in automatic full-scale light range selection logic, which switches measurement range based on input light condition with excellent gain matching between ranges
- 26 bits of effective dynamic range from 2.15 mlux to 144 klux
- 12 configurable conversion times from 600 µs to 800 ms per channel is an excellent choice for a wide variety of high speed and high precision applications
- External pin interrupt for hardware synchronized trigger and interrupts
- Low operating current: 24 µA with ultra-low power standby: 2 µA
- Operating temperature range: –40°C to +85°C
- Wide power-supply range: 1.6 V to 3.6 V
- 5.5-V Tolerant I/Os
- Selectable I2C address
- Small-form factor:
- 2.1 mm x 1.9 mm x 0.6 mm SOT-5X3 package
The OPT4048 is a single-chip high resolution color sensor, capable of measuring four channels each with specific engineered spectral responses. Three of the four channels closely match the CIE tristimulus spectra with the fourth channel having a wide band spectral response. With measurements from these channels, important characteristics of the lighting environment can be extracted like (i) light intensity (lux), (ii) color in CIE XY, LUV coordinates and (iii) Correlated Color Temperature. The OPT4048 is available in a small SOT-5X3 package.
The OPT4048 has a selectable addressing scheme to enable up to 4 devices on a shared I2C bus. The spectral response of the channels have been specially tuned to closely mimic the CIE tristimulus spectra to get the most accurate color detection, with strong rejection for wavelengths away from their respective peaks, especially the NIR (850 nm & 940 nm) region. The filters use an advanced filter technology which provides excellent filter performance even at higher angles of light incidence. This device, with high accuracy color sensing capability, enables several applications requiring precise sensing of ambient light color and color temperature.
The engineered optical filter on OPT4048 provides strong infrared rejection, which aids in maintaining high accuracy, despite placing the sensor under dark glass, which is common requirement from industrial design of end products due to aesthetics.
The OPT4048 is designed for systems that require light level detection to enhance user experience by providing information not only about the intensity, but the color of the illumination.
The OPT4048 device can be configured to operate with light conversion times all the way from 600 µs to 800 ms in 12 steps per channel, providing system flexibility based on application need. Conversion time includes the light integration time and ADC conversion time. Resolution of the measurement is determined by a combination of light intensity and the integration time, effectively bringing in capability to measure down to 2.15 mlux.
The digital operation is flexible for system integration. Measurements can be either continuous or triggered in one shots with register writes or hardware pin. The device features a threshold detection logic, which allows the processor to sleep while the sensor watches for appropriate wake-up event to report via the interrupt pin.
Digital output, representing the light level is reported over an I2C and SMBus compatible, two-wire serial interface.
The low power consumption and low power-supply voltage capability of the OPT4048 helps enhance the battery life of battery-powered systems.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | OPT4048 High Speed High Precision Tristimulus XYZ Color Sensor datasheet | PDF | HTML | 2022年 12月 19日 |
| EVM User's guide | LIGHTSOURCE01EVM Light Source EVM User's Guide (Rev. A) | PDF | HTML | 2024年 9月 11日 | |
| Application brief | How to Select a Light Sensor for Your Application (Rev. C) | PDF | HTML | 2024年 1月 19日 | |
| Application brief | Choosing Between RGB and XYZ Color Sensors for Adaptive Lighting Adjustments | PDF | HTML | 2023年 12月 22日 | |
| Application brief | The Value of a High-Speed, High-Resolution Light Sensor | PDF | HTML | 2023年 2月 6日 |
設計與開發
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OPT4048DTSEVM — 適用於採用 DTS 封裝的高速三刺激 XYZ 色彩感測器的 OPT4048 評估模組
OPT4048DTS 評估模組 (EVM) 是用於評估採用 DTS 封裝的 OPT4048 性能的平台。OPT4048 為高速且高精密度、三刺激 XYZ 色彩感測器，可在各種照明條件下及各種覆蓋材料的後方使用。
OPT4048DTSEVM 由兩個 PCB 組成。第一個是 OPTMBEVM 主機板，其中包含可與執行 GUI 評估軟體的電腦通訊的 USB 介面、插入試樣卡的插座，以及作為 PC 與插入插座之裝置間橋接器的 MSP430 微處理器。此電路板也為光源感測器供電，並在光線感測器和電腦之間傳送和接收適當的數位訊號。第二個電路板為 OPT4048 試樣卡，其包含 OPT4048 (...)
MIKRO-3P-OPT-CLICK — MikroE Optical CLICK evaluation boards
MikroE Click™ boards are compact add-on boards based around TI Optical Sensing Products that are suitable for obtaining ambient light data in applications like display optical-intensity, industrial, or commercial lighting control and enable quick cross-platform prototyping in a standardized (...)
SPRKF-3P-OPT4048-QWIIC — 以 OPT4048 光學感測器為基礎的 SparkFun Qwiic 三刺激色彩感測器快速原型板
SparkFun Qwiic Tristimulus 色彩感測器是以 OPT4048 為基礎打造而成，其具有單晶片高解析度色彩感測器，能夠測量四個通道，且每個通道都有特別設計的光譜響應。標準和迷你尺寸的分接板皆配備兩個 I2C Qwiic 連接器，可較輕鬆地介接 OPT4048。其是屬於 SparkFun Qwiic 連接系統的一部分，因此設計人員不必進行任何焊接，就能了解事物的方向。但是，如果使用模擬板，亦提供間隔為 0.1 吋的針腳。
在 OPT4048 的四個通道中，有三個通道與 CIE (...)
LIGHTSOURCE01EVM — 適用於校準 TI 周圍光源感測器評估模組的穩定光源
LIGHTSOURCE01EVM 是穩定且一致的光源，可用於校準周圍光源感測器 (ALS) 和色彩感測器。此光源專為在生產環境中使用而設計，可校準和測試內含 TI 光源感測器的最終產品。此穩定光源可用於模擬日落 (4200K CCT) 和中午 (6400K CCT) 照明模式。光源均勻且恆定，光輸出隨時間的變化小於 ±1%，且 1 英寸直徑區域均勻度變化小於 ±1%。照明程度和模式可透過光源 EVM GUI 調整。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-5X3 (DTS) | 8 | Ultra Librarian |
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