Please could you let me know what the maximum input voltage and current is for the VCtrl (pin 14) of the ADMV1014 is?
Is it ok to drive the pin from a 5V DAC if I current limit into the pin with a large resistor? (20kohms for instance). I'm assuming the VCTRL would be clamped to a rail through an ESD diode, so if the current is limited to a tiny level everything should be ok.
Thanks for the help
The operating vctrl range is 0V to 1.8V.
The absolute max rating is 2.3V, above which device damage can occur. This is a high impedance pin. You could use a resistor divider to bring down the voltage…
The absolute max rating is 2.3V, above which device damage can occur. This is a high impedance pin. You could use a resistor divider to bring down the voltage from the 5V DAC to the VCTRL pin.
Thanks for the update.
Does this mean that the EVAL-ADMV1014 evaluation board can damage the ADMV1014?
You've directly connected a AD5601 which can drive to 3V3 to the VCTRL pin of the ADMV1014. The software does not stop me setting this above 2.3V.
Yes, based on this that means the nanoDac could potentially damage the part . However, the part has been sampled extensively and we haven't seen this issue so it looks like a long term reliability issue and there won't be any change in the conversion gain after 1.8V anyways.
I will take it up as a bug fix for the nanoDac Plugin though.