PSOC5LP Seq SAR Noise glitche | Cypress Semiconductor
PSOC5LP Seq SAR Noise glitche
I am looking at three 20k sine waves of different amplitudes (same wave) into a PSOC5LP SAR at 12 bits (1M freq). I keep getting a noise glitche (randomly) in both directions. I have disabled everything on it and have added extra capacitance to the the analog pins. I am using VDDA at 3.3V and VDDA/2. All sine waves are riding on VDDA/2 (1.65V). When I single step just before the Enable SAR, the sine wave is clean. Once I enable, the sine wave glitches. Any ideas on why this would happen? I have included my project on this.
I have disabled all of the other peripherals to make sure no interactions. I have disabled the other input A/D ports as well. I have followed the recommended capacitance in the data sheet as well.
Using Op amps ADA4528-1ARMZ-R7 as the input buffers (my own design).
None of the other A/Ds seem to have this noise issue.