SBASA69B August   2023  – December 2024 OPT4003-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Timing Diagram
    8. 5.8 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Spectral Response
        1. 6.3.1.1 Channel 0: Human Eye Matching
        2. 6.3.1.2 Channel 1: Near Infrared
      2. 6.3.2 Automatic Full-Scale Range Setting
      3. 6.3.3 Error Correction Code (ECC) Features
        1. 6.3.3.1 Output Sample Counter
        2. 6.3.3.2 Output CRC
        3. 6.3.3.3 Threshold Detection
    4. 6.4 Device Functional Modes
      1. 6.4.1 Modes of Operation
      2. 6.4.2 Interrupt Modes of Operation
      3. 6.4.3 Light Range Selection
      4. 6.4.4 Selecting Conversion Time
      5. 6.4.5 Light Measurement in Lux
      6. 6.4.6 Threshold Detection Calculations
      7. 6.4.7 Light Resolution
    5. 6.5 Programming
      1. 6.5.1 I2C Bus Overview
        1. 6.5.1.1 Serial Bus Address
        2. 6.5.1.2 Serial Interface
      2. 6.5.2 Writing and Reading
        1. 6.5.2.1 High-Speed I2C Mode
        2. 6.5.2.2 Burst Read Mode
        3. 6.5.2.3 General-Call Reset Command
        4. 6.5.2.4 SMBus Alert Response
  8. 7 Register Maps
    1. 7.1 Register Descriptions
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Electrical Interface
        1. 8.2.1.1 Design Requirements
          1. 8.2.1.1.1 Optical Interface
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Optomechanical Design (USON, SOT-5X3 Variant)
        3. 8.2.1.3 Application Curves
    3. 8.3 Best Design Practices
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
        1. 8.5.1.1 Soldering and Handling Recommendations (USON, SOT-5X3 Variant)
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

6.4.3 Light Range Selection

The OPT4003-Q1 has an automatic full-scale-range setting mode that eliminates the need to predict and set the best range for the device. Set the RANGE register to 0xC to enter this mode. The device determines the appropriate full-scale range to take the measurement based on a combination of current lighting conditions and the previous measurement.

If a measurement is towards the low side of full-scale, then the full-scale range is decreased by one or two settings for the next measurement. If a measurement is towards the upper side of full-scale, the full-scale range is increased by one setting for the next measurement.

If the measurement exceeds the full-scale range, resulting from a fast increasing optical transient event, then the current measurement is terminated. This invalid measurement is not reported. If the scale is not at the maximum, then the device increases the scale by one step and a new measurement is retaken with that scale. Therefore, during a fast increasing optical transient in this mode, a measurement can possibly take longer to complete and report than indicated by the CONVERSION_TIME configuration register.

Using this feature is highly recommended by Texas Instruments because the device selects the best range setting based on lighting conditions. However, there is an option to manually set the range. Setting the range manually turns off the automatic full-scale selection logic and the device operates for a particular range setting. The Range Selection Table lists the range selection settings.

The channel 1 irradiance levels are specified with an 810-nm stimulus. The Range Selection Table shows the behavior of channel 0 and channel 1 when setting the RANGE register. Since channel 1 has 7 full-scale light ranges, the exponent register bits are limited to 6, while channel 0 has 9 full-scale light ranges and a maximum exponent value of 8.

Table 6-3 Range Selection Table for SOT-5X3 Variant
RANGE REGISTER SETTING CH0 TYPICAL FULL-SCALE LIGHT LEVEL FOR SOT-5X3 VARIANT CH0 EXPONENT CH1 TYPICAL FULL-SCALE IRRADIANCE FOR SOT-5X3 VARIANT CH1 EXPONENT
0 613 lux 0 0.469 mW/cm2 0
1 1227 lux 1 0.937 mW/cm2 1
2 2454 lux 2 1.87 mW/cm2 2
3 4907 lux 3 3.75 mW/cm2 3
4 9815 lux 4 7.50 mW/cm2 4
5 19629 lux 5 15.00 mW/cm2 5
6 39259 lux 6 30.00 mW/cm2 6
7 78517 lux 7 30.00 mW/cm2 6
8 157035 lux 8 30.00 mW/cm2 6
12 Determined by automatic full-scale range logic; sets channel 0 and channel 1 independently
Table 6-4 Range Selection Table for USON Variant
RANGE REGISTER SETTING CH0 TYPICAL FULL-SCALE LIGHT LEVEL FOR USON VARIANT CH0 EXPONENT

CH1 TYPICAL FULL-SCALE IRRADIANCE FOR USON VARIANT

 CH1 EXPONENT
0 561 lux 0

0.429 mW/cm2

 0
1 1122 lux 1

0.858 mW/cm2

 1
2 2244 lux 2

1.72 mW/cm2

 2
3 4488 lux 3

3.43 mW/cm2

 3
4 8976 lux 4

6.86 mW/cm2

 4
5 17952 lux 5

13.72 mW/cm2

 5
6 35903 lux 6

27.45 mW/cm2

 6
7 71806 lux 7

27.45 mW/cm2

 6
8 143613 lux 8 27.45 mW/cm2 6
12 Determined by automatic full-scale range logic; sets channel 0 and channel 1 independently