1. I am interfacing sensor thermopile and thermistor , whose data-sheet is attached.
2. Here is schematic of 24 bit adc which is used to measure thermopile mV and thermistor mV.
3. Issue is thermistor tempreature either keep on falling or increasing even if room tempreature is stable. It increase/decrease gradually in steps of 0.01 in either way sometimes up, sometimes down. I have pasted external fluke meter sensor to measure ambient its stable.
4. Measured by CRO the REFPN remians stable also
5. Is the filter capacitors? C1,C2,C3 and C8,C9 & C10? and resistors of 47ohm in series?
2. Here is schematic of 24 bit adc which is used to measure thermopile mV and thermistor mV.
3. Issue is thermistor tempreature either keep on falling or increasing even if room tempreature is stable. It increase/decrease gradually in steps of 0.01 in either way sometimes up, sometimes down. I have pasted external fluke meter sensor to measure ambient its stable.
4. Measured by CRO the REFPN remians stable also
5. Is the filter capacitors? C1,C2,C3 and C8,C9 & C10? and resistors of 47ohm in series?
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