Frequently Asked Question
What clock frequency comes out of the AD9510 outputs when you first apply power to the device?
The PLL is disabled on power-up and CLK1 input is selected. If there is no signal on CLK1 there can be chatter which will show up on the enabled outputs. This can be prevented (if CLK1 will not be used) by tying the inputs somewhat apart in voltage so that it will not pick up noise and cause chatter. If CLK1 is the desired input and a signal is present at power-up, then this signal will drive the outputs and the frequencies present will be according to the preset divide ratios.