EEVblog #579 - Precision Low Current Source

Part 3 in the Precision Current Source series. Dave breadboards a classic precision low current source circuit using the 10V REF102 voltage reference to generate accurate 1mA and 1uA currents. Also some talk about the errors in a typical precision circuit like this. Part 2:    • EEVblog #577 - Precision 1A Current Source...   Part 1:    • EEVblog #567 - Precision 1A Current Source   REF102: http://www.ti.com/lit/ds/sbvs022b/sbv... App Note: http://www.ti.com/lit/an/sbva001/sbva... OPA277: http://www.ti.com/lit/ds/symlink/opa4... VishayPG VHP100: http://www.vishaypg.com/docs/63003/vh... Forum: http://www.eevblog.com/forum/blog/579... EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/