The CDCLVC1102 datasheet only shows the power consumption characteristics (Pdyn & Pcload) for the 2.5V supply in Figure 1.
What are the power consumption characteristics for a 3.3Vdc supply?
Hi Jack,
The plots in Figure 1 and Figure 2 are just graphing out the equations below Table 6.5 and in Section 10.1:
You can substitute VDD = 3.3 V directly into these equations to get the total power consumption for your configuration. Let me know if you have any other questions
Regards,
Connor
Hi Jack,
It looks like there's a small typo in the datasheet, I think "see and Figure 1" should also be linking back to the set of equations in the first image that I attached (right below Table 6.5). Also the equation to calculate Pdyn is missing an n term since it should be getting multiplied by the number of outputs. But to answer your question, Pdyn + Pcload = 10 mW comes from:
Pdyn = Cpd *VDD^2 * f = 6 pF * (3.3V)^2 * 120 MHz = 7.84 mW
Pcload = Cload * VDD^2 * f * n = 2pF * (3.3V)^2 * 120 MHz = 2.61 mW
Pdyn + Pcload = 7.84 mW + 2.61 mW = 10.45 mW which I believe gets rounded down to 10 mW.
Note that Cpd comes from Table 6.5 (typical 6 pF at VDD = 3.3V, 4.5 pF at VDD = 2.5V) and Cload was given in the example calculation. Let me know if this helps.
Regards,
Connor
