Hi Team,
I was planning to use the DAC AD355R in board. In datasheet it is mentioned it can be configured for custom output voltage spans.
The below mentioned are my DAC output required voltages.
| DAC | Output Voltage | RFB Resistor(1,2 or4) | Offset Value | Gain scaling(0,0.125,0.5,1) |
| DAC1 | +/-2V | |||
| DAC2 | +/-750mV | |||
| DAC3 | +/-6V | |||
| DAC4 | +/-2.042mV | |||
| DAC5 | 0-3.3V |
Please provide the RFB resistor values and offset settings required to achieve the desired gain scaling for the specified output voltage ranges, as I am unable to derive accurate values using the datasheet formulas.
Since the board is intended for a critical medical application, the output voltages must maintain a tolerance of less than 3%. In particular, the 2.042 mV output is highly critical and must be achieved as accurately as possible (not exceeding the target value).
Our sample calculation document is also attached. Please review it and provide the feedback.
Also i request to have call to discuss further details on tomorrow or Monday. Please let me know your time.
Regards,
Abhishek
Edit Notes
[locked by: GenevaC at 2:55 PM (GMT -4) on 20 Apr 2026]
