Post Go back to editing

AD4003 negative output

Thread Summary

The user is experiencing sign reversal in the ADC output when using the AD4003 in 3-wire turbo mode with a 100 MHz clock and a 3V differential input signal. The issue is due to the common mode input voltage being out of spec (1.5V instead of 2.5V for a 5V VREF). The solution involves using a fully differential amplifier like the ADA4940 or ADA4945 to meet the common mode input voltage requirement, or switching to the single-ended AD4002.
AI Generated Content

Hi,

I am using AD4003 ADC in one of the design. In this we are using 3-wire turbo mode.

Clock frequency used is 100Mhz.

Now when I provide 3V differential signal to the input of ADC. I am getting a hex value 0x2D0CD which is near to -3V(Read on SDO line).

My question is why I am getting output of ADC with sign reversal?

Regards,

Rohit

Parents Reply Children
No Data

Before You Switch


Switching languages will make ADI Explorer unavailable. Resume your session by switching back to English and reopening ADI Explorer.