Connect max5312 spi dac to Arduino

Projects Programming
6

MISO is not used, leave the pin unconnected.
Connect Arduino's MOSI to DIN on the chip.
DOUT from the chip is not connected to anything for now.

Get rid of these, SPI library sets them up:

const int misoPin = 11; //To connect the DIN pin from the DAC
const int sclkPin = 13;
  digitalWrite(misoPin, HIGH);

  pinMode(sclkPin,OUTPUT);
  pinMode(misoPin,OUTPUT);


  SPI.setBitOrder(MSBFIRST); // from the Datasheet
Don't need - MSBFIRST is default setting

Delete these - not needed with software command 0100:
LDAC & CLR only need to be HIGH:

  digitalWrite(ssPin, LOW); 
  digitalWrite(sclkPin,HIGH);
  delay(2);
  digitalWrite(sclkPin,LOW);
  digitalWrite(ldacPin, LOW);

Add to go with these:
  pinMode(ldacPin,OUTPUT);
digitalWrite (ldacPin, HIGH);

  pinMode(clrPin,OUTPUT);
digitalWrite (clrPin, HIGH);

Make those changes, repost your code.