Tlv2543, is 12 bits a little much.

mosquito56

· I use the 8038 adc extensively but got a professional develepment board and some tlv2543 from another prop head. I am wondering why I want to split 3.3v into 4096 pieces? Does anyone know why they need that amout of accuracy?
·· ·I could maybe understand the need if the chip used 5.5v but I only saw one line for vref+ to be up to 6.5v but the recommended voltage was 3.3v.

· 8038···· = 5.5v /256 = .02v resolution
· tlv2543 = 3.3v/4096 =·.00008 v resolution.

· Since I have read so much positive on the tlv2543, what am I missing? The costs are similiar.

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David B

What if you had a sensor that measured angle as a voltage, and you wanted the angle measured to minutes of accuracy? Then you'd want maybe 15 bits of conversion to read that voltage into your processor.

You pick your ADC depending on what your project needs, which may be 8 or fewer bits, or may be more.

Agent420

Of course, you could always just use however many significant bits you actually require.

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Leon

More than 10 bits starts to get challenging in terms of PCB layout.

Leon

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Timmoore

I use it because of the combinaton of features. Its good enough that i use it when I need an A2D in almost any project. With 11 channels I haven't had to use a 2nd A2D, with 3.3V is easy to integrate with the prop, at 12bits it has enough resolution for almost any project (if its too much then I just filter) and its fast enough that I can run a low pass filter to deal will noise problems, and its cheap enough I dont need to think about using a cheaper a2d, and I have 1 driver so I can get on with the project rather than integrating a new chip and writing a new driver.