Maximum capacitance at the output of the AD9837

To whom it may concern,

We are using the AD9837 would like to generate a sine wave, and would like to filter the output.

What is the maximum allowable capacitance at the output of the AD9837?

Figure 17 on page 9 of the AD9837 data sheet shows a 20 pF capacitor at the output, which seems to do little with respect to filtering.

Figure 14 on page 8 and Table 2 on page 11 of the EVAL-AD9837SDZ shows a 100 nF capacitor.

When we added 100 nF to the output of our AD9837, it killed the output (125 kHz sinusoidal output, 4 MHz clock, 2.5 V supply).

Thank you in advance,