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I am looking for high precision and great consistency millivolt source design reference for thermal couple sensor. This circuitry design is pretty same as my current design.
I have some questions below:
1) Is this circuit applicable or fine-tuned to output voltage reference source range like +2V to -2V instead of +10V to -10V?
2) The AD5791 has a good linearity error long term stability in the specification. It could achieve about 0.11~0.19 LSB after 1000 hours at specified room temperature. In real application, will the output op amp AD8675A contribute any impact to the output consistency?
Once the voltage reference values are in the ranges specified in the datasheet, the DAC should work as expected. We cannot guarantee the functionality of the part at values out of specs.
A positive reference voltage range of 5V to VDD-2.5V, and a negative voltage reference voltage range of VSS+2.5V to 0V are possible reference inputs for the AD5791.
The value of this voltages and the configuration of the output amplifier allow the user to obtain different output voltage spans (Unity Gain/ Gain of Two Configuration).
Looking at the reference/output buffers, there should be no major issues/impact on the output.
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