Arduino Library to control the 8 channel digital to analog converter IC DAC7568 from TI.

• 8 programmable voltage outputs
• Buffered outputs, no need for external OP amp
• 3.3V or 5V supply operation
• Internal high accuracy reference 2.5V (not yet supported in this libarary)

There are 2 versions of this IC:

• -A gain 1x, max output 2.5V when using internal ref, or 1x VREF_IN pin if using external voltage ref
• -C gain 2x, max output 5V when using internal ref, or 2x VREF_IN pin if using external voltage ref

#include <Arduino.h>
#include "DAC7568.h"

DAC7568 DAC = DAC7568(3300, 17); // setup DAC, 3.3V external reference (VREF_IN pin), pin 17 for SYNC

void setup()
{
    DAC.begin();
}

void loop()
{
    DAC.set_chan_voltage(0, 1000); // set channel 0 (A) to 1V
    DAC.set_chan_voltage(3, 2500); // set channel 3 (D) to 2.5V

    delay(3000);

    DAC.set_chan_voltage(0, 3000); // set channel 0 (A) to 3V
    DAC.set_chan_voltage(3, 500);  // set channel 3 (D) to 0.5V

    delay(3000);
}

Set chan_num (0-7) to voltage_mv mv

set_chan_voltage(uint8_t chan_num, uint16_t voltage_mv);

Set chan_num to mode (see enum in .h file for options), either ON or OFF with different pulldown resistor values

set_chan_mode(uint8_t chan_num, channel_mode_t mode);