KCC Quizzes AQQ303 about the radius of a circle
1. Quote of the month: "When I die, I want to die like my grandfather who died peacefully in his sleep. Not screaming like all the passengers in his car" - Will Rogers
2. Quiz AQQ304 about finding the radius of a circle
Good luck, and try to be
View All
August Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Important: Read the blog first . The quiz questions are all based on the content of the blog:
Stay in the loop and win! Read the blog Current Output Driving Industrial Loops , then take our quick five-question quiz for a chance to win a gift card
View All
AD8616
Production
The AD8615, AD8616 and AD8618 are single, dual and quad
rail-to-rail input and output single supply amplifiers featuring
very low offset voltage, wide...
Datasheet
AD8616 on Analog.com
Hi, ADI expert
I am now preparing to use the ad8616 in a PID control application, the design simulation is as follows, the output VF3 is almost 0, I think if the positive phase (thermistor feedback voltage, Rth voltage) and reverse phase (reference voltage) of U2 are 1.5V, through PID adjustment, my understanding: its output should also be 1.5V, I don't know if this is the case, I mainly want to ask if there is a problem with the PID control circuit with the op amp, I hope to solve the doute, thank you!
Hi Licunxu,
Thanks for reaching out regarding the query for the AD8616.
For the circuit above I think the configuration itself the standard PID controller circuit. But I want to make sure that the amplifier itself is stable using the values used. Have you tried running it on AC analysis? were you able to get the right pole and zero values on the configuration?
If you can provide the specification you need for the PID controller we can help you optimize the circuit and choose the right components for it. You may also want to look at this article https://www.analog.com/en/technical-articles/hfan0820-how-to-control-and-compensate-a-thermoelectric-cooler-tec.html as it has a section for the PID controller circuit on setting up the poles and zero of the controller. Hope the article helps.
Thank you!
Best Regards,
Dann