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The Designer's Guide Community Forum › Design › Analog Design › which is better for clk input of adc on pcb board?
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which is better for clk input of adc on pcb board? (Read 1744 times)
xwj623
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which is better for clk input of adc on pcb board?
Aug 20th, 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.
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loose-electron
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Re: which is better for clk input of adc on pcb board?
Reply #1 - Aug 22nd, 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.
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Jerry Twomey
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Berti
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Re: which is better for clk input of adc on pcb board?
Reply #2 - Aug 24th, 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).

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