Keithley 6220 DC User Manual page 154

6221 AC and DC Current Source
HISTORY:
Ver 1 – Draft –RKN on 7/01/03
Ver 2 – Update spec per Meeting with Audit –BJP/AD
Ver 3 – Update spec per measurement capability EB
Ver 4 – Update spec per Meeting AD/RKN
Ver 5 – Update 12/1/03, used for Engineering Sample Audit.
Ver 6 – Update 04/8/04, per Eng Sample Audit (RKN)
Ver 7 – Update 05/14/04, for Eng Pilot Audit (RKN)
Ver 8 – Update 05/20/04, for Eng Pilot Audit (RKN)
Ver 9 – Update 06/07/04, for Eng Pilot Audit (RKN) (Trigger rate
changed to 1000/s, common mode added 50-60Hz at 250Vrms.)
Rev A – Update 06/08/04, release version of Ver5 (RKN)
INTERNAL SPECIFICATIONS:
Arbitrary Function generation min frequency can be 1μHz with loss of
frequency accuracy
Jitter definition is the amount of variation in the period
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.
All typical noise and settling time specifications are only spot checked
by the cal and verify system at these conditions and limits:
a) RMS Noise 10Hz-20MHz, limit checked to 5x typical due
to cal system noise floor limitations.
b) Fast mode settling time 100mA : Check limit of 3us.
c) Fast mode settling time 20mA : Check limit of 3us.
d) Fast mode settling time 2mA : Check limit of 3us.
e) Fast mode settling time 200uA : Check limit of 4us.
f) Fast mode settling time 20uA : Check limit of 5us.
g) Fast mode settling time 2uA : Check limit of 6us.
h) All nA ranges check limits are same as specification.
LTR REVISIONS
A Released 29843
B 40096E Revised
FORM 28777A-SBG
COMPANY CONFIDENTAL
APP. DATE DRN.
HW
CKD.
SZ 6/11/04
SZ 1/17/05
APP.
SK
SPECIFICATIONS
DATE
6/11/04
DATE
DATE
6/11/04
HW 1/17/05
Rev B
Page 1 of 1
Keithley Instruments, Inc.
Cleveland, Ohio 44139
PART NUMBER
SPEC-6221