Fangrui Product Details The Ad5693r Breakout Board Is A 16-bit With An I2c Interface And A Temperature Compensated 2.5v Internal Reference For Compact, High-precision Output. We Broke Out The Addr/a0 Pin So You Can Connect Two Dacs On One I2c Bus By Simply Pulling The A0 Pin High (or Closing The Jumper On The Back) To Prevent Conflicts. A 6-pin Header Is Also Included For Breadboarding. Work With Either 3.3v Or 5v Logic, And You Can Set The Output Maximum To Either 2.5v Or 5v (2xvref). If Youre Powering With 3.3v, Youll Be To Set The Output Range To Either 2.5v Or Vin. We Have An Easy To Use For Library And Tutorial With A Sine Wave Output Example That Work With Nearly Any Microcontroller Or Microcomputer With An I2c Host. Comes With A Little 0.1inch Standard Header In Case You Want To Use It With A Breadboard Or Perfboard. Four Mounting Holes For Easy Mounting. There Is An Optional 3.5mm Terminal Block The Pcb - We Dont Include 3.5mm Terminal Blocks, But They Are Common And In Stock In The Shop - You Can Solder In Place If You