I'll purchase the AD9650-25EBZ but now it is EOL product. Can I set a sampling speed to 25MSPS on the AD9650-80EBZ?
Yes, all of the AD9650 ADC models (-25, -65, -80, -105) share the same mininimum conversion rate of 20Msps w/DCS Enabled, or 10Msps w/DCS Disabled.
All the AD9650 speed grades share the same physical eval brd as described in http://www.analog.com/media/en/technical-documentation/user-guides/UG-003.pdf
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