Hi Alessio, The reference design you mentioned is a good solution for using one DAC8760 to produce multiple channels for voltage and current output. It uses a multiplexer and 8 sample and hold circuits to produce the 4 channels of voltage outputs and 4 channels of current output. It doesn't directly use the current output of DAC8760 but rather uses voltage sample and hold circuits followed by 4 XTR111 devices that convert the voltage outputs from the sample and hold to current. This is a viable solution but requires many other devices (OPAs+XTR+discretes) and also will have limitations on update rate due to the settling and hold time of the S+H circuitry. I would recommend you look into using DAC8775 which is a 4-ch. device with all of the voltage and current ranges you require. This would likely be a smaller solution size since there are no additional XTRs or OPAs required. The device also offers adaptive power management to reduce power dissipation and generates all of the required rails for operation from a single 12V-36V supply input with an internal buck-boost converter. You could use just 3 of the channels in your application and depopulate the components for the 4th channel to reduce solution size. I have attached an image below of a size-optimized layout with all 4 channels with protection components. If the internal buck-boost is not used then many components could be eliminated. Let me know if you have additional questions. Thanks, Garrett
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