I have some basic questions about IDAC:
1. In data sheet of ADS1248, condition on using IDAC is (Vdd-0.7V) voltage compliance. I am using AVdd = 5V.
What if I use 4K resistor & IDAC of 1.5mA. Theoretically it produces voltage of 6V. But it cannot happen.
So what will happen actually in this case. Will it damage ADS1248.
2. Suppose I use Avdd = 5V, res = 1333 ohm & IDAC = 1.5mA. Theoretically it will produce voltage of 2V across resistor. But since Avdd = 5V & Vres = 2V. So will rest of 3V come across internal transistor/mosfet across Vce/Vds. & dissipate power across it. Or Avdd is independent & voltage generated across resistor is independent. A internal diagram could make it easier, if available??