SBASA67 June   2023 OPT4060

PRODUCTION DATA  

  1.   1
  2. Features
  3. Applications
  4. Description
  5. Revision History
  6. Description (continued)
  7. Pin Configuration and Functions
  8. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  9. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Infrared Light Rejection
      2. 8.3.2 Automatic Full-Scale Range Setting
      3. 8.3.3 Output Register CRC and Counter
        1. 8.3.3.1 Output Sample Counter
        2. 8.3.3.2 Output CRC
        3. 8.3.3.3 Threshold Detection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Modes of Operation
      2. 8.4.2 Interrupt Modes of Operation
      3. 8.4.3 Light Range Selection
      4. 8.4.4 Selecting Conversion Time
      5. 8.4.5 Light and Color Measurement
        1. 8.4.5.1 Determining ADC Codes for Each Channel
        2. 8.4.5.2 Lux and Color Calculations
        3. 8.4.5.3 Threshold Detection Calculations
      6. 8.4.6 Light Resolution
    5. 8.5 Programming
      1. 8.5.1 I2C Bus Overview
        1. 8.5.1.1 Serial Bus Address
        2. 8.5.1.2 Serial Interface
      2. 8.5.2 Writing and Reading
        1. 8.5.2.1 High-Speed I2C Mode
        2. 8.5.2.2 Burst Read Mode
        3. 8.5.2.3 General-Call Reset Command
        4. 8.5.2.4 SMBus Alert Response
    6. 8.6 Register Maps
      1. 8.6.1 Register Map
  10. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Electrical Interface
        1. 9.2.1.1 Design Requirements
          1. 9.2.1.1.1 Optical Interface
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Optomechanical Design
        3. 9.2.1.3 Application Curve
    3. 9.3 Best Design Practices
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
      3. 9.5.3 Soldering and Handling Recommendations
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Overview

The OPT4060 measures the color properties of the light source that illuminates the device. This device measures four channels (R Channel, G Channel, B Channel, W Channel) with special spectral characteristics, which helps extract properties of the light source (i) the lux level and (ii) the correlated color temperature. Each channel (R, G, B) is named for the color it is sensitive to. The additional W channel has a wide spectral response.

With engineered spectral profiles, the OPT4060 measures the intensity and color of any light source or environment. This helps applications where measuring the precise characteristics of the lighting environment is critical like display brightness, color adjustment, camera color correction and object color recognition. Strong rejection of infrared light, which a human does not see, makes the OPT4060 especially good for operation underneath windows that are visibly dark, but infrared transmissive

The OPT4060 is fully self-contained to measure the properties of light and report the result in ADC codes digitally over the I2C bus. The result can also be used to alert a system and interrupt a processor with the INT pin. The result can also be summarized with a programmable threshold comparison with a specified channel and communicated with the INT pin.

The OPT4060 is by default configured to operate in 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 be selected manually as well. 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. With device exhibiting linearity over the entire 26-bit dynamic range of measurement, no additional linearity calibration is required at system level.

The OPT4060 contains four channels, results of which are always available all the time as independent channel registers which can be digitally read over the I2C bus synchronously or asynchronously.

The device measures light for four channels sequentially (R, G, B, W) with selectable conversion times from 600 μs per channel to 800 ms per channel in 12 steps. Measurements can be read asynchronously or through the interrupt pin, which can be configured to generate an interrupt every time a single channel completes conversion or every time all four channels complete conversion.

The device starts up in a low-power shutdown state, such that the OPT4060 only consumes active-operation power after being programmed into an active state.

The OPT4060 optical filtering system is not excessively sensitive to small particles and micro-shadows on the optical surface. This reduced sensitivity is a result of the relatively minor device dependency on uniform density optical illumination of the sensor area for infrared rejection. Proper optical surface cleanliness is always recommended for best results on all optical devices.