Design a Circuit

[Jaweria 22]

Hello, I need to design a temperature-sensitive voltage supply (Vsk) with the following requirements: the supply voltage should maintain stability with minimal variation due to temperature changes. The design should incorporate an operational amplifier, a fixed-voltage LDO, and a DAC. The voltage should have a flexibility of 0.2V and operate with low noise. Could someone provide guidance or suggestions on how to achieve this?"

4o

 

[BradtheRad]

The 5V zener diode is known for being a voltage rating where two different graphs cancel each other out. Thus it can serve as reference. The graphs have to do with temperature response via two characteristics of zener operation. One goes up according to temperature, the other graph goes down. A 5 V zener has the plots meeting.

--- Updated Today at 5:49 AM ---

electrical-information.com/zener-diode-temperature-coefficient/

 

[KlausST]

Hi,

a design starts with requirements and technical specifications.

Requirements here are:
* "using OPAMP"
* "LDO" .. Voltage, current? What is it used for? As output device that needs to be "controlled by the OPAMP" or is it used as the OPAMP supply.
* "DAC"... and what´s it´s function. Is it to compensate drifts only, or to set outut voltage and/or current... or any other function

Technical specifications come with numbers and units: This means you need to decide and give numbers for:
* supply voltage
* temperture sensitive (whatever this means)
* voltage stability / variation
* "flexibility" (whatever this means)
* noise
(this list is accorsing your text)

BUT: You miss a lot of important things:
Like:
* What´s the input power supply, with it´s noise and it´s variations?
* what´s the expected output voltage (range)?
* what´s the expected output current range?
* everything that describes teh DAC: bit resoluuton, drift, accuracy, precision..... and most of all: what is the DAC expected to do?

A circuit is hard to be described in three lines of text (even for professinals). Thus please provide something like a schematic .. at least a draft, that shows all your "parts" and how they interact (aare connected) with each other. Pictures are way better to describe such things .. especially when crossing language borders ... and one is not familiar with technical terminology.

Klaus

 

[danadakk]

Reference material :

Voltage Reference - From Diode To High Precision High Order BandGap - Anna’s Archive

Gabriel Alfonso Rincon-Mora The foremost tutorial resource on the design of integrated voltage references, from theory to real-l Wiley-IEEE Press

annas-archive.org

Regards, Dana.