UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

richard.cs · 11th Mar 2016, 3:59 pm

For 1% SMT resistors at least the errors in the values are systematic and a given reel tends to have resistors very well matched to each other even if up to 1% from their nominal value. At work I have just measured a 901:1 voltage divider made from one hundred 100k 1% 0603 resistors as having an error of better than 0.03%. That's considerably better than the error you would get with resistor values randomly distributed in the 1% range.

Only works if you're careful to ensure they're all populated from the same reel.

11th Mar 2016, 3:59 pm	#20
richard.cs Triode Join Date: Feb 2011 Location: Southampton, Hampshire, UK. Posts: 46	Re: Another DIY voltage reference... For 1% SMT resistors at least the errors in the values are systematic and a given reel tends to have resistors very well matched to each other even if up to 1% from their nominal value. At work I have just measured a 901:1 voltage divider made from one hundred 100k 1% 0603 resistors as having an error of better than 0.03%. That's considerably better than the error you would get with resistor values randomly distributed in the 1% range. Only works if you're careful to ensure they're all populated from the same reel.