Post Go back to editing

AD9707 REFIO current capacity

The data sheet states the reference output current is 100nA. However on the example circuit (figure 90) REFIO is loaded with two ADA4841-2 inputs each one with 3uA (typ) to 5.3uA (max). Is it safe using this example circuit as is?

  • Hi -

    I would follow note 3 under table 1 in the data sheet if using REFIO as a reference for an external amplifier. The note states that you should use a buffer with an input current less than 100nA for this type of application. I would say that figure 90 is a block diagram not a ready to use circuit.