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The rest of your description lets assume that:- load is 2.5V and have 680 ohm series.
Nothing else...Does anyone experienced if this IC can sink ?
I wonder why so many people are afraid of using a paper and a pencil..Unfortunately there is not much a circuit but an explanation.
I don't think you find a more precise way than using a good quality shunt resistor. In my eyes the temperature drift of any other method is higher...but they add extra errors like unlinearity, hysteresis, noise...I didn't want to measure the current with series resistor method because resistance changes with temprature,
This is what I was looking for.I need to change the Vref to 1.75 so it can oscillate between 0.5V-3V which is suitable for my MCU adc input.
Hi,
I don't think you find a more precise way than using a good quality shunt resistor. In my eyes the temperature drift of any other method is higher...but they add extra errors like unlinearity, hysteresis, noise...
Hi,
If you use an ADC, then this ADC needs a reference voltage.
Klaus
TL431 IC (programmable precision reference) provides 2.5v in its basic simple configuration, can sink. (In order to source I believe current comes from the power supply). (When I read about it I set my meters to it.)
cdn.sparkfun.com/datasheets/Components/General IC/TL431-D.pdf
Seriously?I've read the datasheet, but I may be having a blindness on selective perception. Could you please point where it is ?
This is nonsense. I don't know what special shunt you are looking for.A good quality shunt resistor which can sustain 10A and with low tolerance is 130$ + shipping + taxes
How can this be? Hopefully it does not use VCC as reference...if, then it's useless to talk about precision and accuracy....The MCU board I'm using has no ADC reference pin.
This is nonsense. I don't know what special shunt you are looking for.
How can this be? Hopefully it does not use VCC as reference...if, then it's useless to talk about precision and accuracy....
Hi,
Shunt:
An expensive one.
But you noticed this is the "MPQ" price. But what is MPQ? 1 piece?
Klaus