I am willing to use ADA4870 for the design of a voltage buffer (low output impedance) with >1A output current. Anyone suggesting a reference design with the use of more than one ADA4870 chips?
You could put a small resistor in series with each 4870 output, say 5 Ohms. As stated in Table 6 of the data sheet, the recommended Rf value for a gain of 1 is 2k Ohms. Please see attached pic as a reference in your design.
I hope this helps.
thanks for your answer, indeed it helps. I was wondering about the Rs=5 Ohm output resistor. As my load should not show high C, I was wondering if there is any drawback in reducing the Rs further, if not even removing them. Are there any stability issue possibly arising? Thanks.
The series resistor at the output is only needed for capacitive loads or if there is significant board capacitance at the output which needs to be driven by the ADA4870. For resistive loads, it is absolutely not needed; it can be reduced or even removed entirely.
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