Keithley 6220 Reference Manual page 404

6220 Programmable Current Source
SOURCE SPECIFICATIONS
Range
(+5% over range)
23°C±5°C
±(%rdg. + amps)
2nA 0.4% + 2pA
20nA 0.3% + 10pA
200nA 0.3% + 100pA
0.1% + 1nA
2μA
0.05% + 10nA
20μA
0.05% + 100nA
200μA
2mA
0.05% + 1μA
20mA
0.05% + 10μA
100mA
0.1% + 50μA
ADDITIONAL SOURCE SPECIFICATIONS
OUTPUT RESISTANCE: >10
OUTPUT CAPACITANCE: <10pF, <100pF Filter ON. (2nA/20nA
range)
LOAD IMPEDANCE: Stable into 100μH typical.
CURRENT REGULATION: Line: <0.01% of range.
Load: <0.01% of range.
VOLTAGE LIMIT (Compliance): Bipolar voltage limit set with
single value. 0.1V to 105V in 0.01V programmable steps.
Accuracy for 0.1V to 20V: 0.1% +20mV, accuracy for 20V to
105V: 0.1% + 100mV
MAX. OUTPUT POWER: 11W, four quadrant source or sink
operation.
GUARD OUTPUT:
Maximum Load Capacitance: 10nF.
Maximum Load Current: 1mA for rated accuracy.
Accuracy: ±1mV for output currents <2mA. (excluding output lead
voltage drop).
PROGRAM MEMORY: (offers point-by-point control and
triggering, e.g. Sweeps)
Number of Locations: 64K.
EXTERNAL TRIGGER: TTL-compatible EXTERNAL TRIGGER
INPUT and OUTPUT.
Max Trigger Rate: 1000/s.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Accuracy Programming
(1 Year) Resolution
100fA
1pA
10pA
100pA
1nA
10nA
100nA
1μA
10μA
14
Ω. (2nA/20nA range)
Temperature Typical Noise
(peak-peak)
Coefficient/°C
/RMS
0°-18°C& 28°-50°C
0.1Hz-10Hz
0.02% + 200fA 400/80fA
0.02% + 200fA 4/0.8pA
0.02% + 2pA 20/4pA
0.01% + 20pA 200/40pA
0.005% + 200pA 2/0.4nA
0.005% + 2nA 20/4nA
0.005% + 20nA 200/40nA
0.005% + 200nA
2/0.4μA
0.01% + 2μA 10/2μA
6220 – 2182 MEASUREMENT FUNCTIONS
DUT RESISTANCE: Up to 1GΩ (1 nSiemen).
DELTA MODE RESISTANCE MEASUREMENTS and
DIFFERENTIAL CONDUCTANCE: Controls Keithley Model
2182A Nanovoltmeter at up to 24Hz reversal rate (2182 at up to
12Hz).
Source Notes
1 Settling times are specified into a resistive load, with a maximum resistance
.
equal to 2V / I
fullscale of range
2 Settling times to 0.1% of final value are typically <2x of 1% settling times.
3 Noise current into <100Ω.
4 RMS Noise 10Hz-20MHz (2nA – 20mA Range) Less than 1mVrms, 5mVp-p
(into 50Ω load).
5 Typical values are non-warranted, apply at 23°C, represent the 50
and are provided solely as useful information.
Settling Time
(1% of final value)
3,4,5
100μs
100μs
100μs
100μs
100μs
100μs
100μs
100μs
100μs
See manual for other load conditions.
th
percentile,
1,2
HW 1/17/05
Rev B
Page 1 of 2