T
treez
Guest
Which would be the most accurate for giving a voltage output, the MCP4013 as a digital pot, or the MCP4716 DAC?
We need to give a control voltage to a led driver IC (LT3756) between 0v and 1.2v. Whatever voltage we set it to, we need it to be accurate to within 50mV…eg, if we set it for 0.98v, then we don’t want it being higher than 1.03v, as the led driver components would overheat.
We don’t mind that the mcp4013 only allows 64 output voltages steps, -as long as it gives these accurately then that is fine.
MCP4716 DATASHEET
https://ww1.microchip.com/downloads/en/DeviceDoc/22272C.pdf
MCP4013 DATASHEET
https://ww1.microchip.com/downloads/en/DeviceDoc/21978c.pdf
Looking at the INL parameter, (0.5LSB for mcp4716, and 0.25LSB for mcp4013, you would think that the MCP4013 digital pot was more accurate than the MCP4716 DAC)?
We need to give a control voltage to a led driver IC (LT3756) between 0v and 1.2v. Whatever voltage we set it to, we need it to be accurate to within 50mV…eg, if we set it for 0.98v, then we don’t want it being higher than 1.03v, as the led driver components would overheat.
We don’t mind that the mcp4013 only allows 64 output voltages steps, -as long as it gives these accurately then that is fine.
MCP4716 DATASHEET
https://ww1.microchip.com/downloads/en/DeviceDoc/22272C.pdf
MCP4013 DATASHEET
https://ww1.microchip.com/downloads/en/DeviceDoc/21978c.pdf
Looking at the INL parameter, (0.5LSB for mcp4716, and 0.25LSB for mcp4013, you would think that the MCP4013 digital pot was more accurate than the MCP4716 DAC)?