Systems and methods of hybrid resistive digital-to-analog converters

A circuit comprising:

• a first digital-to-analog converter (DAC) comprising a set of resistors connected in series, a first resistor of the set of resistors connected to a multiplexor and a second resistor of the set of resistors connected to the multiplexor;
• a second DAC comprising a first set of R-2 R resistors, the first set of R-2 R resistors comprising a first R resistor with a value R and a first 2 R resistor with a value 2 R, the first resistor of the set of resistors being connected to an output of the second DAC;
• a third DAC comprising a second set of R-2 R resistors, the second set of R-2 R resistors comprising a second R resistor with the value R and a second 2 R resistor with the value 2 R, the value R being half the value 2 R, the second resistor of the set of resistors being connected to an output of the third DAC;
• a termination resistor of the second DAC connected to a positive reference voltage of the circuit;
• and
• a termination resistor of the third DAC connected to a negative reference voltage of the circuit, an output of the circuit providing a reference voltage.

A device comprising:

• a digital-to-analog converter (DAC) circuit configured to output a reference voltage for an operation of the device, the DAC circuit comprising:
• a first DAC comprising a set of resistors connected in series, the set of resistors connected to a multiplexor, a first resistor of the set of resistors connected to a positive reference voltage of the circuit and a second resistor of the set of resistors connected to a negative reference voltage of the circuit;
• a second DAC comprising a set of R-2 R resistors, the set of R-2 R resistors comprising a first resistor with a value R and a second resistor with a value 2 R, the value R being half the value 2 R;
• and
• a scaling circuit to modify a resolution of the second DAC relative to a resolution of the first DAC, the scaling circuit connecting the first DAC to the second DAC.