Keithley Instruments, Inc.
Cleveland, Ohio 44139
DRN.
CKD.
APP.
DATE
DATE
DATE
PART NUMBER
LTR REVISIONS APP. DATE
FORM 28777A-SBG
BRUNING 40-21 62198-SBG
SPECIFICATIONS
COMPANY CONFIDENTAL
HW 1/17/05
Rev B
Page 1 of 1
SPEC-6220
A Released 29842 SZ 6/08/04
B 40096E Revised SZ 1/17/05
HW 6/11/04
SK 6/11/04
6220 Programmable Current Source
HISTORY:
Ver 1 – Draft –RKN on 12/01/03, based on Ver 4 of 6221 Spec.
Ver 2 – Update 04/08/04, per Eng Sample Audit (RKN)
Ver 3 − Update 5/14/04, for Eng Pilot Audit (RKN)
Ver 4 − Update 5/20/04, for Eng Pilot Audit (RKN)
Ver 5 − Update 6/07/04, for Eng Pilot Audit (RKN) (Trigger rate changed to 1000/s, common mode added 50-60Hz at 250Vrms.)
Rev A − Update 6/08/04, release version of Ver5 (RKN)
INTERNAL SPECIFICATIONS:
2nA/20nA ranges use the same sense resistor, thus noise is the same between the two ranges.
For Guard accuracy greater than 2mA load current, accuracy is approximately 0.5mV/mA of load current, or about 50mV max at 100mA load
current.
Low current range (20uA and below) 1% settling time specs are limited by ability to verify performance.
RMS Noise 10Hz-20MHz, limit checked to 5x typical due to cal system noise floor limitations.
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