Search FAQs on the left to see if your question has been answered. Click on the dropdown to view all of the documents associated with the product. If you can't find your question, click on Ask a Question

AD7541A: Using a current out MDAC in voltage switching mode

In data sheets I have seen the circuits for OUT-Vin to 0, +Vin to - Vin, -Vin/2
to +Vin/2, but I need 0 to +Vin.
I guess that it is the typical use, so it is automatical without OAmp and
without feedback resistor, isn't it?


The circuit to obtain Vout from 0 to Vin is shown in figure 7 on page 6 of the
datasheet, in the section  entitled "Single Supply operation". Note that in
this case the applications circuit is turned around the opposite way: the fixed
reference is applied to OUT1, OUT2 is connected to ground and the output is
taken from Vref.

A buffer amplifier is required since the output resistance at Vref is typically
11kOHMS with a range from 7kOhms to 18kOhms.