Hi,

Can you tell us the max and min value in Vp for Vinx+ or Vinx- and a common mode value with Vref = 1,4V for AD9655 because it is not clear in the datasheet?

Also, do you have a newer datasheet (more recent that Rev. 0)?

Thank you in advance.

Best regards,

Hi D@niel,

Thank you for your interest in AD9655.

Input common mode voltage is stated in Table 2 of the datasheet. All of Table 2 is for VREF = 1.4V.

For VREF = 1.4V:

The minimum input common mode voltage is 0.7V.

The maximum input common mode voltage is 1.0V.

The nominal input common mode voltage is 0.9V.

With VREF = 1.4V, the full-scale differential input voltage is 2.8Vpp_differential. This means that each side of the differential signal swings 1.4Vpp; 0.7V below VCM and 0.7V above VCM. As a result, the maximum voltage for the input signal (with respect to ground) would be VCM + 0.7V = 0.9V + 0.7V = 1.6V (with nominal VCM and a full scale signal). Similarly, the minimum voltage for the input signal (with respect to ground) would be VCM - 0.7V = 0.9V - 0.7V = 0.2V (with nominal VCM and a full scale signal).

Is this what you are asking about?

Datasheet Rev. 0 is still the latest version.

Thank you.

Doug