ADS52J90: can ADS52J90 input a pure DC signal (yes /no)

Hi Ehud,

1. can ADS52J90 input a pure DC signal (yes /no)?

Yes, the input frequency range is 0 - 70 MHz. 

2. can ADS52J90EVM input a pure DC signal (yes /no)?

Yes.

3. which TI multichannel device can input DC signal?

I believe almost all SAR adcs can measure DC signals. You can refer to the following webpage to browse through multichannel ADS products.

https://www.ti.com/data-converters/adc-circuit/overview.html

Thanks & regards,

Abhishek