I have a question about a MAX10 based medical device that provides RF Field therapy and uses the ADC to sample field-strength feedback for closed-loop control. It checks and errors upon sampling a field strength below the low limit setpoint. The device has been generating random and intermittent errors in field tests.
Testing has revealed that our system has been exposing the ADC inputs to voltages beyond the recommended 3.6V max range. The concern is whether the ADC has become damaged or simply behaves incoherently after having been exposed to the out of range voltages.
Please see the attached power point slides describing the issue and I will greatly appreciate your input.
Try by enabling/disabling the clamp diode, we can limit overshoot or undershoot.See if it works.
Also refer below link page 5
- ADC is fine as per the report, The test for linearity confirms that. but according to datasheet page 5 Maximum Allowed undershoot to –2.0 V for input currents less than 100 mA and periods shorter than 20 ns.
However Intel is not recommending or guaranteeing the performance at Absolute Maximum Ratings.
Please do check old case with similar issuse