Selection of Single channel Digital Potientiometer (1 M ohms) and Single Channel DAC IC to interface with Arduino Mega 2560

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Hi Sir,
I am Planning to Interface Single channel Digital Potentiometer IC (1 M ohms) and Single Channel DAC IC to interface with Arduino Mega 2560. Can you Please share the Details of already used Single channel Digital Potentiometer IC(ranges from 0 to 1 M ohms) and Single channel DAC IC which is already interfaced to use for my application.?

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AD5241BRZ1M.
and
MCP4725

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3

What is the purpose of your application?

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Digital Potentiometer is to adjust the gain of the differential Opamp . DAC is to set the analog reference to the Digital compare Value.
Is the Digital Potentiometer can be used to adjust the gain of the opamp. it is advisable to use digital potentiometer? Digital Potentiometer is stable for the gain control.? Slight change in Potentiometer value will be reflected in the amplified signal.

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Have you seen the analog comparator of the Mega?

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No. Why Sir.? What is the Analog Comparator in the Mega? Anything you have specially mentioning?

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See the controller data sheet.

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Page No:265. what is in it? attached the Image for reference. You mean to use the Analog comparator instead of DAC?
Screenshot from 2023-08-05 16-04-53

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Sir. Can we use this two I2c chips AD5241BRZ1M and MCP4725 in Arduino UNO.
Arduino UNO has 2 12C Port? if Arduino UNO has 1 12C Port, In such case, how to use this two chips in arduino UNO?Kindly let us know.

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You only need one I2C bus. All I2C IC will connect to one bus.
This explains how it works:

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Hi Sir, My application forces me to use the Double channel DAC. MCP4725 have single channel in it. Can you able to recommend the dual channel in it to interface with arduino mega? Please help.

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The MCP4728 is a quad DAC

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Hi Sir,
Kindly recommend any Development Testing board for AD5241BRZ1M/AD5242BRZ1M to interface with Arduino Mega for prototype testing.

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Hi sir, I found that the Part: AD5241BRZ1M - 1 M ohms Digital Potentiometer have the tolerance of -30% and +50%. Can you please recommend any Part with less tolerance Digital Potentiometer with 1 M ohms to interface with arduino? Kindly let us know. Kindly help.

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What tolerance do you require?

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Hi sir, Thanks for the reply. Less than or equal to +/-10% tolerance. Will Prefer for the Less tolerance if able with 1 M ohms resistance.

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I almost certain that a 1M in that tolerance does not exist

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Hi sir, Will 1M ohms tolerance of equal to or less than +/-20% is available. Kindly let us know. 30% tolerance is huge for my application.

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Hi Sir, Will 1M ohms tolerance of equal to or less than +/-20% is Possible? Kindly let us know.

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