Timeline for How are voltage references established in low-power designs?
Current License: CC BY-SA 3.0
6 events
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| Jun 24, 2017 at 15:17 | comment | added | jonk | @pipe I could. But there are already some really good answers and they are closer to the OP's wish for the LM431 and... besides... the best answer is already chosen. A nice discussion about trapping a tiny bit of charge and then buffering it out as a voltage reference will just have to wait. | |
| Jun 24, 2017 at 13:37 | comment | added | pipe | @jonk You have more space if you write an answer. | |
| Jun 24, 2017 at 2:46 | history | edited | Jack Creasey | CC BY-SA 3.0 | added 1 character in body |
| Jun 23, 2017 at 23:34 | comment | added | jonk | @CalebReister The Xicor (now Intersil) X60008 (I think Jack missed a zero in there) provides a crazy-low \$I_Q\le 0.5\:\mu\textrm{A}\$, crazy good initial accuracy of \$\pm0.01\%\$ for A- and B- grade devs, insanely good tempco of \$1\frac{ppm}{^\circ C}\$ (A- grade) and all that over an industrial temp range. It's insanely good. Julius Blank and his ilk really did some neat stuff at Xicor. The FGA device uses a proprietary floating gate MOS device, analog switches, charge pumps, current sources, a differential charge amp, and some special blocking caps. I could write more, but no space. | |
| Jun 23, 2017 at 23:28 | comment | added | Caleb Reister | I am wondering how such references are actually created. i.e. where do the internal references such as 2.5V for the LM431 or the 1.25V in the LM317 come from? | |
| Jun 23, 2017 at 22:47 | history | answered | Jack Creasey | CC BY-SA 3.0 |