Hi,
I am using the DRV134 to output a 10VDC signal to power a strain gauge bridge.
The load can vary anywhere from 1.1K to higher. There is also a lowest value of 750ohm.
Looking at the performance curve on on page 6 , it looks like for a 10V output, the current can be max +/-40mA.
I am running simulations and observing that as I vary the load(1.1K ,750 ohms,5K,etc load).
I am observing that the output jumps around by almost 1V...even though I am not exceeding the output sourced current.
Am I missing something here?
I am attaching the schematic and simulation. I have to adjust R36 to get the output to be around 10VDC for a load value.
The output is fine with an open load.SG_schematic.pdfDC sweep_simulation.pdf
Thanks,
SK