12V with AD5280 DigitalPot

I am uisng AD5280BRUZ20(20K ) with arduino to perform potentiometer operation. When i am using 5V as supply for VDD then its working perfectly. But when i change the power supply for VDD to 12V then its not showing the output at W pin of AD5280. I am attached the circuit diagram with 5V and 12V connection. What is wrong with the diagram?

Also, the Arduino code which i am using is-

#include <Wire.h>
byte val = 0;

void setup() {
  // put your setup code here, to run once:
  Wire.begin();
  Serial.begin(115200);
  delay(500);
}


void loop() {
  // put your main code here, to run repeatedly:
  val += 50;      // increment value
  if (val > 250) { // if reached 64th position (max)
    val = 0;    // start over from lowest value
  }
  Wire.beginTransmission(44); // transmit to device #44 (0x2c)
  // device address is specified in datasheet
  Wire.write(byte(0x00));            // sends instruction byte    0x40
  Wire.write(val);             // sends potentiometer value byte
  Wire.endTransmission();
  delay(5000);
}

Recommended