Hi team,
My customer want to use INA1650 with 5V single supply, 20kohm load and 2.2V reference voltage.
Could you calculate/simulate the maximum output voltage swing in this condition?
Is it possible that we simulate output voltage vs output current by TINA like a chart inside the simulation model?
INA1650_single_supply_RL_20k_Ref_2p2V.TSC
Hello,
For convenience, I have attached the updated simulation setup at the bottom of the post.
To run the simulation you can use the option under
Analysis>DC Analysis> DC Transfer Characteristic
In order to slam the output into the rail you can use the Ref pin with a DC voltage driving it as shown below. I have attached a current source to the output in order to sweep the current. I flip the current source for sinking current into the INA1650, with the arrow pointing up. In this case I drive V1 negative.
In order to source current I flip it the other direction with the arrow pointing down. In this case I drive V1 positive. This will allow for the curves to be on the same plot nicely. In order to get both curves onto one plot you can highlight a curve and copy paste it onto the other plot.
The output swing vs output current is in the non-linear range. To stay within the linear operating range you can use the Analog Engineers Design calculator found here:
https://www.ti.com/tool/ANALOG-ENGINEER-CALC?keyMatch=ANALOG%20ENGINEERS%20CALCULATOR
I have entered the customers conditions into the design calculator to show the max input and output conditions.
Chris-san,
Really thank you for your kindness.
Even though I explain to my customer that the output voltage swing is limit by the characteristics of common mode voltage vs Vout rather than the characteristics of swing from rail but, he still want to know it. He want to know the minimum output voltage with RL=20kohm.
I though it can be simulated by output voltage vs output current but, I couldn't find 430mV or 1300mV in the simulation result.
Is it possible that we simulate the parameter by TINA?
I don't stick to simulation. Actual measurement result also acceptable.
Best Regards,
