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Altera_Forum's avatar
Altera_Forum
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15 years ago

Urgent! hardware interface between FPGA DE2 board(3.3V) and ADC(5V)

HI, may i ask your guys a favor. I am using DE2 board for my project and i need to interchange signals(SPI) to an ADC. The ADC is 5V for logic high but the max output signal for DE2 board is only ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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Sounds really unlikely. The clock waveform looks very much like something's connected incorrectly in your circuit.

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HI,FvM.

I checked the connection already. Actually there is not much to check. The signal to input of ADS7861 is expected sinusoidal waveform. Then the connection after ADC is only direct to the voltage translator without any component added in between. I checked before ADC and output of voltage translator as i mentioned last thread. They are no problem. Then, the distorted waveform arise after i combined these two part.