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About AD7740 question

Question asked by mantoa on Dec 15, 2011
Latest reply on Sep 16, 2014 by MaryMc

1. If BUF pin is left unconnected, it default 1 or 0?  or the pin must be connected to hi or low?

2. Is the transfer function equation (figure 4) in datasheet the same for BUF=1 and BUF=0?

3. I use internal 2.5V reference. If the REFIN/OUT pin connected for testing and calibration, should I add a capacitor (0.1uF) on REFIN/OUT pin and GND pin for avoid reference voltage variation?