Forcing and sensing dacs sharing reference voltage

In a device or assembly including an integrated circuit having reference voltage buffer circuitry including an amplifier circuit, a method of avoiding voltage contention or conflict at a commonly-routed amplifier shared output voltage node that is shared between at least two digital-to-analog converters (DACs) respectively via at least first and second individually routed traces from the shared output voltage node to respective first and second local reference voltage nodes located at corresponding DACs, the method comprising:

• forming the first and second individually routed traces with respective first and second routing resistances that are based on an expected or measured current loading from the corresponding DAC to provide an equal voltage drop across the first and second routing resistances for avoiding voltage contention or conflict at the shared output voltage node from forcing/sensing the voltages at the first and second local reference voltage nodes.

A device or assembly including an integrated circuit comprising:

• buffer circuitry having an output voltage node that is shared between two resistor string digital-to-analog converters (DACs) respectively via first and second individually routed traces from the output voltage node to respective first and second local reference voltage nodes located at corresponding DACs;
• and
• wherein the first and second individually routed traces are configured with respective first and second routing resistances that are based on a determined current loading from the corresponding DAC to provide an equal voltage drop across the first and second routing resistances for avoiding voltage contention at the shared output voltage node from forcing/sensing the voltages at the first and second local reference voltage nodes.