3.3V output from Arduino UNO

Dear Members,

I'm using Arduino UNO to configure my ADC chip via SPI but the output clock and data from the Arduino is 5V and I need 3.3V to configure my chip. Can anyone suggest me the solution for this?

Please don't Crosspost - putting the same question in multiple places.
One question, one thread.
Topic locked.
https://forum.arduino.cc/index.php?topic=433598.msg2988273#msg2988273