Qwiic 1.8V Adapter

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Our Qwiic Connect System is designed to help you quickly interface development boards and breakouts in your project or prototype. One way the Qwiic system achieves this is by standardizing on a single bus voltage of 3.3 Volts. This means that any Qwiic-compatible board that's based on a 1.8V part has an on-board voltage regulator and logic level translator, but what if you have a 1.8V part with no breakout board and you need to get integrated into your Qwiic project? No worries! This Qwiic 1.8V Adapter supplies 1.8V at up to 300mA as well as bi-directional logic level translation so that you can connect your Qwiic system to any 1.8V I²C part you can find! Simply connect the adapter to your bus using a Qwiic cable, connect your 1.8V part to the header pins marked "1.8V," and now your part is on the 3.3V Qwiic bus! As on other Qwiic boards, we've also broken out the 3.3V pins to a 0.1" header and added two Qwiic connectors, making it easy to connect in line with all of your other Qwiic boards.

The SparkFun Qwiic Connect System is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

Experimental Product: SparkX products are rapidly produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no guarantees. Live technical support is not available for SparkX products. Head on over to our forum for support or to ask a question.
  • AP2127 LDO Regulator provides 1.8V at 300mA from the Qwiic bus
  • PCA9306 Bi-Directional level shifter handles I²C logic translation
  • Power LED verifies the board is connected to Qwiic bus and can be disabled with a solder jumper for low power systems


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • Member #1833865 / last year / 1

    With 3v3 input, the output is too high- 2.1V! Outside the range for my sensitive 1v8 devices... With putting a small 1N4148 diode on the input to the LDO (dropping 3.3V a bit) the output is stable 1v8. This should be changed in the design so that it will always produce output within the specified range.

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