The DACx0508 output buffer amplifier is capable of generating rail-to-rail voltages on its output, giving a maximum output range of 0 V to VDD. Each buffer amplifier is capable of driving a load of 2 kΩ in parallel with
10 nF to GND.
The full-scale output voltage for each channel is determined by the reference voltage (VREF), the reference divider setting (DIV), and the output buffer gain for that channel (GAIN), as shown in Table 1. During normal operation the DIV and GAIN settings can be reconfigured through the REF-DIV and BUFF-GAIN bit (See Equation 1). The GAIN setting for each output channel can be individually configured thus enabling independent output voltage ranges for each DAC output.
|DIV Setting||GAIN Setting||DAC OUTPUT RANGE|
|÷2||×1||0 V to ½ × VREF|
|÷2||×2||0 V to VREF|
|÷1||×2||0 V to 2 × VREF|