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Design >> Analog Design >> which is better for clk input of adc on pcb board?
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Message started by xwj623 on Aug 20^th, 2009, 12:32am

Title: which is better for clk input of adc on pcb board?
Post by xwj623 on Aug 20^th, 2009, 12:32am

as in the attached fig.
the top one is input sin wave,
while the bottom one is input pulse wave.
which one is better?

this is on the pcb board.

Title: Re: which is better for clk input of adc on pcb board?
Post by loose-electron on Aug 22^nd, 2009, 2:55pm

generally you want a square wave (50% duty cycle) clocking the ADC

the Vmax and Vmin of the square wave should (generally!) be between the Vpower and Vground of the ADC.

Title: Re: which is better for clk input of adc on pcb board?
Post by Berti on Aug 24^th, 2009, 5:18am

Generally I agree with Jerry ... but sometimes I got better results with sinusoidal clock signals due to interference on the PCB (for prototype circuits).

Regards