Hi Mickey,
Table 1 on pg 9 of the REF3233 datasheet has recommended values for R1 and C1. The issue is that these values assume a fast rise time.
The simplest solution would be to just replace the REF3233 with the REF3433. P2P stands for pin to pin…
Hi Joseph,
Thank you for your help, I have made some adjustments to the circuit, as shown in the below picture.
I can not find the package file from the TI web, so the REF3433 did not show in the PCB schematic.
If there are some errors, please…
Or see section 10.2.2.3 in the datasheet of TI's REF3433:
10.2.2.3 VIN Slew Rate Considerations In applications with slow-rising input voltage signals, the reference exhibits overshoot or other transient anomalies that appear on the output. These phenomena…
Hi Mahesha,
Thanks for sharing a PDF schematic with me!
Is there any reason why you're not measuring the voltage across each of the RTDs deferentially and using a reference resistor (to make the measurement ratiometric), similar to the following configuration…
Hi Ari,
That really depends on how accurate you want the conversion results to be. Using VDDA as reference to VREFHI is possible but conversion results will not degrade. VDDA supply powers the analog blocks inside the chip and part of the analog block…
