MD_SHAHRUKH
Advanced Member level 4
- Joined
- Jun 5, 2017
- Messages
- 103
- Helped
- 4
- Reputation
- 8
- Reaction score
- 5
- Trophy points
- 18
- Location
- Bangalore, India
- Activity points
- 1,107
Hello everyone,
I am facing a problem on creating some resistance. I want to create 100 ohm, 150 ohm, 220 ohm, 470 ohm, 680 ohm and 1.5 kohm using a digital potentiometer. The value will change with the data give to the digital potentiometer. The requirement is to provide this resistance value to two pin output. The Digital potentiometer which is available here is 10 kohm, and 1 kohm will available after few weeks. I am unable create exact values of resistance using this 10 kohm potentiometer.
IC I am using now = AD5254BRUZ1
I have tried to make a parallel connection of these potentiometer like the following image:
Still after the calculation of resistance as per the datasheet I am leaving with some error of 2%-3%.
Is there any better solution to this problem, to get exact value of resistance in two pins. Like multiplexing of resistance or something else?
Thank you.
I am facing a problem on creating some resistance. I want to create 100 ohm, 150 ohm, 220 ohm, 470 ohm, 680 ohm and 1.5 kohm using a digital potentiometer. The value will change with the data give to the digital potentiometer. The requirement is to provide this resistance value to two pin output. The Digital potentiometer which is available here is 10 kohm, and 1 kohm will available after few weeks. I am unable create exact values of resistance using this 10 kohm potentiometer.
IC I am using now = AD5254BRUZ1
I have tried to make a parallel connection of these potentiometer like the following image:
Still after the calculation of resistance as per the datasheet I am leaving with some error of 2%-3%.
Is there any better solution to this problem, to get exact value of resistance in two pins. Like multiplexing of resistance or something else?
Thank you.