I have a question about Figure 46 in the AD7327 datasheet , Rev B . Our application also uses +/10V range, but our Vcc is 3.3V, not 5V as in said figure. How does the curve/equation change for Vcc = 3.3V? Somehow, our software team is using this equation in our product and I don't know where it came from:
temperature in Celsius = (-1.772)*(decimal value of the 13bit temperature value from TEMP_SENSE register) + 7811.1
[example: -1.772 * 4320 + 7811.11 = 156.07 156.06 C when the TEMP_SENSE register's 13 bits are 1000011100000]
I'm wondering if your answer to my question will match the mystery equation.