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› 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 1745 times)
xwj623
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Posts: 36
which is better for clk input of adc on pcb board?
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.
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snap001622_001.jpg
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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 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.
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Jerry Twomey
www.effectiveelectrons.com
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Contract IC-PCB-System Design - Analog, Mixed Signal, RF & Medical
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Berti
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Re: which is better for clk input of adc on pcb board?
Reply #2 -
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
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