EEVblog #579 - Precision Low Current Source

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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: http://www.youtube.com/watch?v=O2ohz8DyJoQ
Part 1: http://www.youtube.com/watch?v=pXMhpEi_wPU
REF102: http://www.ti.com/lit/ds/sbvs022b/sbvs022b.pdf
App Note: http://www.ti.com/lit/an/sbva001/sbva001.pdf
OPA277: http://www.ti.com/lit/ds/symlink/opa4277.pdf
VishayPG VHP100: http://www.vishaypg.com/docs/63003/vhp100.pdf
Forum: http://www.eevblog.com/forum/blog/579-precision-current-source/

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Tags:
precision current source
current source
diy
ltc6655
breadboard
voltage reference
pass transistor
series pass
transistor
darlington
testing
troubleshooting
oscilloscope
circuit
schematic
ref102
10v
error analysis
error margin
drift
measurement
ppm
temperature
vishay
vhp100