Frequently Asked Question
What kind of problems can I expect from exceeding the maximum clock rate? (power dissipation, spectral problems)
Typically, the first thing to happen when you exceed the maximum CLOCK RATE is a violation of the thermal specifications of the device. The increase in clock rate causes an increase in power dissipation which raises the die temperature. This temperature rise can be calculated by the following formula: Tdie = Tambient+ PWR(Theta JA). You should not exceed the maximum junction temperature specification, which is typically 150C.
Overclocking also may result in spectral degradation, due to the violation of internal timing requirements (internal setup and hold times) which are thermally sensitive. If you over clock an ADI DDS part, you do so at your own risk. ADI does not guarantee performance or lifespan of the device.