I2C communication stuck

Question

Working with a LTC2606CDD#PBF 16 bit DAC. I cannot get any voltage out. I found this library https://github.com/rambo/I2C

I2C scan reveals.

Master Address 0x73
Slave Address 0x10

Here is my code.

#include <I2C_16Bit.h>
#include <Wire.h>

// Put your own I2C address here
#define I2C_ADDR 0x10

// Your register address, which can be found on your IC's datasheet
#define DATA_REGISTER_ADDR 0x73

void setup() {
    Serial.begin(9600);

    I2C_16Bit_begin();
}

void loop() {
    I2C_16Bit_writeToModule(I2C_ADDR, DATA_REGISTER_ADDR,0XFFF);
  delay(500);
    uint16_t registerData = I2C_16Bit_readFromModule(I2C_ADDR, DATA_REGISTER_ADDR);

    Serial.print("Register data: ");
    Serial.println(registerData);

    delay(1000);
}