The Keithley 6220 is a high-precision DC current source designed for low-resistance testing, nanotechnology measurements, and semiconductor characterization. It features ultra-low noise output from 100 fA to 100 mA, high output impedance, and built-in control features to support delta-mode measurements when paired with a Keithley nanovoltmeter.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (IEEE-488), RS-232, Trigger Link |
| Display | Vacuum Fluorescent Display (VFD) |
| Standard Warranty | 1 year |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 V to 240 V AC, 50 Hz to 60 Hz, 120 VA max |
| Operating Temperature | 0 °C to 50 °C |
| Dimensions (W×H×D) | 213 mm × 89 mm × 370 mm |
| Weight | 4.75 |
System and Channel Configuration
| Parameter | Value |
|---|---|
| Number of Channels | 1 |
| Guard Offset Voltage | < 1 mV |
| Maximum Common Mode Voltage | 250 V rms (DC to 60 Hz) |
| Maximum Isolated Voltage to Earth | 250 V rms |
| Output Terminals | 3-slot triaxial (rear panel) |
| Guard Output Type | Active Guard |
Current Source Specifications
| Parameter | Value |
|---|---|
| Current Output Ranges | 2 nA, 20 nA, 200 nA, 2 µA, 20 µA, 200 µA, 2 mA, 20 mA, 100 mA |
| Minimum Current Output | 100 fA |
| Maximum Current Output | 105 mA |
| Current Programming Resolution (2 nA range) | 100 fA |
| Current Programming Resolution (20 nA range) | 1 pA |
| Current Programming Resolution (200 nA range) | 10 pA |
| Current Programming Resolution (2 µA range) | 100 pA |
| Current Programming Resolution (20 µA range) | 1 nA |
| Current Programming Resolution (200 µA range) | 10 nA |
| Current Programming Resolution (2 mA range) | 100 nA |
| Current Programming Resolution (20 mA range) | 1 µA |
| Current Programming Resolution (100 mA range) | 10 µA |
| Current Programming Accuracy (2 nA range) | ±(0.4% + 2 pA) |
| Current Programming Accuracy (20 nA range) | ±(0.3% + 10 pA) |
| Current Programming Accuracy (200 nA range) | ±(0.1% + 100 pA) |
| Current Programming Accuracy (2 µA range) | ±(0.05% + 1 nA) |
| Current Programming Accuracy (20 µA range) | ±(0.05% + 10 nA) |
| Current Programming Accuracy (200 µA range) | ±(0.05% + 100 nA) |
| Current Programming Accuracy (2 mA range) | ±(0.05% + 1 µA) |
| Current Programming Accuracy (20 mA range) | ±(0.05% + 10 µA) |
| Current Programming Accuracy (100 mA range) | ±(0.05% + 100 µA) |
| Voltage Compliance Range | 0.1 V to 105 V (10 mV steps) |
| Voltage Compliance Accuracy | ±(0.1% + 20 mV) |
| Output Impedance (2 nA range) | > 10^14 Ω |
| Output Impedance (20 nA range) | > 10^13 Ω |
| Output Impedance (200 nA range) | > 10^12 Ω |
| Output Impedance (2 µA range) | > 10^11 Ω |
| Output Impedance (20 µA range) | > 10^11 Ω |
| Output Impedance (200 µA range) | > 10^10 Ω |
| Output Impedance (2 mA range) | > 10^9 Ω |
| Output Impedance (20 mA range) | > 10^8 Ω |
| Output Impedance (100 mA range) | > 10^7 Ω |
| Current Source Noise (0.1 Hz to 10 Hz, 2 nA range) | < 80 fA p-p |
| Current Source Noise (0.1 Hz to 10 Hz, 20 nA range) | < 80 fA p-p |
| Current Source Noise (0.1 Hz to 10 Hz, 200 nA range) | < 800 fA p-p |
| Current Source Noise (0.1 Hz to 10 Hz, 2 µA range) | < 8 pA p-p |
| Current Source Noise (0.1 Hz to 10 Hz, 20 µA range) | < 80 pA p-p |
| Current Source Noise (0.1 Hz to 10 Hz, 200 µA range) | < 800 pA p-p |
| Current Source Noise (0.1 Hz to 10 Hz, 2 mA range) | < 8 nA p-p |
| Current Source Noise (0.1 Hz to 10 Hz, 20 mA range) | < 80 nA p-p |
| Current Source Noise (0.1 Hz to 10 Hz, 100 mA range) | < 800 nA p-p |
| Output Settling Time | < 110 µs to 0.1% of final value |
Triggering and Memory Buffer
| Parameter | Value |
|---|---|
| Data Buffer Memory Size | 65,536 points |
| Trigger Source Options | Immediate, Timer, Manual, GPIB, Trigger Link, Digital I/O |
| Trigger Latency | < 2 µs |
Control and Connectivity
| Parameter | Value |
|---|---|
| Digital I/O Port | 1 input, 4 outputs |
| Safety Interlock | 3-pin micro-fit connector |
| Command Sets / Programming Languages | SCPI (Standard Commands for Programmable Instruments), Keithley Model 220 Emulation |
General and Environmental
| Parameter | Value |
|---|---|
| Warm-up Time | 1 hour to rated accuracy |
Physical and Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -25 °C to 65 °C |
| Operating Altitude Limit | Up to 2000 m |
Compliance and Standards
| Parameter | Value |
|---|---|
| Safety Certifications | Conforms to European Union Directive 73/23/EEC, EN 61010-1 |
| Electromagnetic Compatibility (EMC) | Conforms to European Union Directive 89/336/EEC, EN 61326-1 |
Performance
| Parameter | Value |
|---|---|
| Maximum Output Power | 11 W |
| Maximum Load Capacitance (Stable Operation) | 10 nF (typical) |
| Temperature Coefficient | ±(0.1 × specification)/°C for 0°C to 18°C and 28°C to 50°C |
| Sweep Types | Linear, Logarithmic, Custom (up to 65,536 points) |
Compliance
| Parameter | Value |
|---|---|
| Compliance Voltage Programming Resolution | 10 mV |
Interfaces
| Parameter | Value |
|---|---|
| Trigger Link Connector | 8-pin mini-DIN |
| Digital I/O Connector Type | 9-pin D-sub |
| GPIB Connector Type | 24-pin IEEE-488 |
| RS-232 Connector Type | 9-pin D-sub |
Power Supply
| Parameter | Value |
|---|---|
| Maximum Power Consumption | 120 VA |
Technology
Precision Current Source
Applications
Nanotechnology characterization, low-resistance measurements, Hall effect measurements, differential conductance