# VCNL3040 Reference Design ## Description This project is a reference design for the VCNL3040 sensor interfaced via I2C. It includes a VCNL3040 ambient light sensor, a voltage regulator (AP2112K-3.3TRG1), an I2C level shifter using BSS138 MOSFETs, and necessary support components. Circuit interfaces through a JST connector. All components are powered by a 3.3V power source. #referenceDesign #industrialsensing #vishay #template #reference-design ## Project Details - **Owner:** vasyl - **Created:** 11/20/2023 - **Last Updated:** 2/8/2024 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Copies:** 4 ## Key Components ### IC1 — [VCNL3040](https://www.flux.ai/vasyl/vcnl3040~rz3.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Ambient Light, IR, UV Sensors - Manufacturer Part Number: VCNL3040 - Datasheet URL: https://www.vishay.com/docs/84917/vcnl3040.pdf - Manufacturer Name: Vishay Semiconductor Opto Division **Pins:** - ANODE [pin 5] - CATHODE [pin 4] - GND [pin 3] - INT [pin 7] - NC [pin 2] - SCLK [pin 6] - SDAT [pin 8] - VDD [pin 1] ### J1 — [QWIIC I2C JST Connector](https://www.flux.ai/vasy_skral/qwiic-i2c-jst-connector~d55.md) - Manufacturer Part Number: SM04B-SRSS-TB - Manufacturer Name: JST Sales America Inc. - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/JST%20PDFs/SR%20Connector.pdf - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### Q1 — [BSS138](https://www.flux.ai/vasy_skral/bss138~3ld.md) - Manufacturer Name: onsemi - Manufacturer Part Number: BSS138 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Part Type: Transistor **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q2 — [BSS138](https://www.flux.ai/vasy_skral/bss138~3ld.md) - Part Type: Transistor - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Manufacturer Part Number: BSS138 - Manufacturer Name: onsemi **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U1 — [AP2112K-3.3TRG1](https://www.flux.ai/adrian95/ap2112k-33trg1~zlq.md) - Datasheet URL: Diodes Incorporated - Manufacturer Name: https://www.diodes.com/assets/Datasheets/AP2112.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AP2112K-3.3TRG1 - Part Type: Integrated Circuit **Pins:** - EN [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vasyl/vcnl3040-reference-design~8o](https://www.flux.ai/vasyl/vcnl3040-reference-design~8o).* --- *Generated from [https://www.flux.ai/vasyl/vcnl3040-reference-design~8o](https://www.flux.ai/vasyl/vcnl3040-reference-design~8o)*