Hello,
I'm having a problem with the accuracy of the 555 timer chip. page 3 of the datasheet gives the initial accuracy as 2.25% but that's with a 0.1uF capacitor whereas I'm using something around 5000pF. I've tested the chip with 1000pF and get results that are almost 12% off and then when I use the 5000pF its much more reasonable, something like 3%, so I figure that the initial accuracy is based heavily off of the chips internal capacitance, but the datasheet doesn't mention what that might be and none of the manufacturers seem to know since it's such an old part. I was just wondering if anyone had any idea as to how that accuracy changes over different capacitor values.
Thanks
I'm having a problem with the accuracy of the 555 timer chip. page 3 of the datasheet gives the initial accuracy as 2.25% but that's with a 0.1uF capacitor whereas I'm using something around 5000pF. I've tested the chip with 1000pF and get results that are almost 12% off and then when I use the 5000pF its much more reasonable, something like 3%, so I figure that the initial accuracy is based heavily off of the chips internal capacitance, but the datasheet doesn't mention what that might be and none of the manufacturers seem to know since it's such an old part. I was just wondering if anyone had any idea as to how that accuracy changes over different capacitor values.
Thanks