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TMS320F28377D: About hardware design for external ADC reference

Part Number: TMS320F28377D
Other Parts Discussed in Thread: LM4132, REF6030

Hi expert,

My customer is asking for how to design external ADC reference circuit.

In our reference design, voltage followers are added between reference output and ADC reference input pins.

Is that part necessary for the design? (Any theoritical calculation here?)

How can we determine if we need this kind of circuit or not? (currently we are using LM4132 & LM4050)