yes sirIt is a digital to analog converter. A binary number on the MCU pins is converted to an analog voltage where all the resistors meet and the op-amp is to buffer the output.
It should ideally have a load resistor and some feedback but it will work as it is. Note the values of the resistors is approximately doubling although I would have expected R22 to be 22 Ohms, this is to reflect the weighting of the binary levels at the MCU pins. Maybe the lower values are 'adjusted' to correct non-linearity elsewhere.
Brian.
Da and Db connwcted to another icB and D are buffers. A is a difference amplifier. C is an inverting amplifier.
--- Updated ---
Why R34?
--- Updated ---
With the formula you wrote for A to hold, R31 = R28 and R32 = R29.
Okay.Da and Db connwcted to another ic
Analog mux
Its not complete circuit
It's for better loading elimination on the microcontrollerOkay.
What do you intend to achieve with B?
Thanks for your attention my friendIs your schematic correct ?
View attachment 166619
Because you are not operating into a summing junction I don't think you have a DAC -
View attachment 166625
Regards, Dana.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?