SBAA432A april   2020  – july 2023 OPT3001 , OPT3001-Q1 , OPT3004 , OPT3006 , OPT3007

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction to TI's Light Sensor Portfolio
  5. 2Material Inspection
  6. 3Sensor Board Hardware Design
  7. 4Build-up Standalone Light Sensor Test Platform
    1. 4.1 Functional Test
      1. 4.1.1 Communication Test
      2. 4.1.2 Sensor Function Test
    2. 4.2 Test Equipment
    3. 4.3 Hardware Platform
    4. 4.4 Software Code Examples
  8. 5Summary
  9. 6References
  10. 7Revision History

3 Sensor Board Hardware Design

Figure 3-1 shows the OPT4001 light sensor design schematic. The light sensor is typically mounted on a dedicated sensor board and is separate from the main board. The light sensor board is able to connect to the main board. Refer to the following design tips:

  • The SDA and SCL pins require pullup resistors. Customers can add resistors to the light sensor board or the main board. For the best signal quality, avoid using long wires or traces. Pullup resistors are not shown in Figure 3-1 since these resistors are added to the main board.
  • The OPT4001 VDD pin must have a stable, low-noise power supply with a 100-nF bypass capacitor close to the device and solid grounding.
  • The INT test pin is optional. If needed, include a pullup resistor, since the INT pin is an open drain.
  • The PicoStar™ package does not have ADDR and INT pins.
GUID-6525FB78-75C2-414B-870F-C29D5F7FEC29-low.jpg Figure 3-1 OPT4001 Schematic

For all TI light sensors, follow the PCB layout guidelines in the Layout section of the OPT4001 data sheet.