In the AD9767(14 bits) datasheet, the figure 68 shows the SNR vs. clock placement.
The AD9763 is 10 bits, and AD9765 is 12 bits.
According to the ADC/DAC SNR formula, the SNR = 6.02*N + 1.72 dB.
From the figure 68, if fix the clock placement, I found the AD9767 has the worse SNR performance.
It is contrary to the formula!
Please help to explain this question, and provide the ENOB spec.