I was reading the presentation "Signal Conditioning and Linearization of RTD Sensors" and trying to simulate the 2 wire single op ap. I was able to download the "RTD_Lnearization_v7.xls" file and I input my parameters below.
Temp Range from 0-200C, Output Voltage Range from 0.2 to 4, and Vref as 2.5V, R1 = 2.49k
The original SPICE circuit of implementing the OPA188 with split supply (Temp Range 0-200C, Vout 0-5V, VREF 5V, R1= 4.99k) of works fine and shows that the error between ideal and measured is 1mV. When I try to switch to a single supply using either the TLV333 or OPA333 with the same parameters as the original circuit, the difference between ideal and measured is ~0.4mV. I assume this is due to the different properties of the op amps (voltage offset, etc...). At the tail near 5V the error increases significantly most likely because of the rail limitation. Which is fine.
So when I change the circuit to my parameters, R1 = 2.49k, R2 = 25.45k, R3 = 45.55k, R4 = 1k, R5 = 60.54k. I come up with this.
Here is the source
Are there any other recommendations that you would suggest implementing or revising with this circuit and using the TLV333?
Thanks
-David