ADC3422: power supply for clock oscillator of ADC3422

Xiaoqiang Shen

Part Number: ADC3422

Hi,

I use separate LVDS clock oscillator for ADC3422.

I separate digital power supply and analog power supply for this ADC IC.

So, for oscillator, which power supply should be connected, digital or analog?

+1 dBrock over 2 years ago

Hello,

The analog power rail should be used for the ADC clock oscillator.

Best Regards,

Dan

0 Xiaoqiang Shen over 2 years ago in reply to dBrock

I have two choice of clock input for ADC3422.

Both of them has the same jitter value.

Which one is better solution?

1) 3.3V LVDS oscillator, but 3.3V can only shares with other digital circuit. You know analog power rail of this ADC3422 is 1.8V.

2) 1.8V LVCMOS oscillator, then it can shares analog power rail of this ADC3422.

0 Rob Reeder over 2 years ago in reply to Xiaoqiang Shen

Hi Shen,

Option 2, would be better as to not mix the clock and digital supply.

Thanks,

Rob

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