Hello
We have been used PGA309 absolute scale, there are no problems.
Now we want to use its ratiometric scale. According to reference files it should be OK. What we want is that output is 0.5V-4.5V under the power supply of 5V.
As we understand that the difference between absolute scale and ratiometric scale is power supply changed from internal to external. We adjusted external power supply, but output was not proportional. please refer to the attached files.
My problem: compared with absolute scale, what are needed to change in hardware and software when use of ratiometric scale?
Weiming Zhang
