2440

The Keithley 2440 is a high-current 60W SourceMeter Instrument (SMU) designed for test applications requiring tightly coupled precision voltage and current sourcing and measurement. Part of the industry-standard Keithley Series 2400 SourceMeter family, the Model 2440 provides 5A output capability at up to 10V, and 1A output at up to 40V, making it ideal for testing high-power semiconductors, LEDs, and power management devices.

Component Testing Semiconductor Testing Source Measure Unit

Specifications

General

Parameter	Value
Interfaces	GPIB (IEEE-488.2), RS-232, Digital I/O, Trigger Link
Display	12-character vacuum fluorescent display (VFD)
Maximum VA Rating	240 VA
Cooling System	Internal cooling fan
Non-volatile Setup Storage	5 user-defined instrument setups

Physical

Parameter	Value
Power Supply	100V to 240V AC, 50Hz to 60Hz, 240VA max
Operating Temperature	0°C to 50°C
Dimensions (W×H×D)	213 mm × 89 mm × 370 mm
Weight	4.1 kg

Source Specifications

Parameter	Value
Maximum Output Power	60 W
Voltage Source Ranges	200mV, 2V, 20V, 40V
Current Source Ranges	10µA, 100µA, 1mA, 10mA, 100mA, 1A, 5A
Voltage Source Resolution (200mV Range)	5 µV
Voltage Source Resolution (2V Range)	50 µV
Voltage Source Resolution (20V Range)	500 µV
Voltage Source Resolution (40V Range)	1 mV
Current Source Resolution (10µA Range)	500 pA
Current Source Resolution (100µA Range)	5 nA
Current Source Resolution (1mA Range)	50 nA
Current Source Resolution (10mA Range)	500 nA
Current Source Resolution (100mA Range)	5 µA
Current Source Resolution (1A Range)	50 µA
Voltage Source Accuracy (200mV Range)	±(0.02% + 600 µV)
Voltage Source Accuracy (2V Range)	±(0.02% + 600 µV)
Voltage Source Accuracy (20V Range)	±(0.02% + 2.4 mV)
Voltage Source Accuracy (40V Range)	±(0.02% + 4.8 mV)
Current Source Accuracy (10µA Range)	±(0.035% + 6 nA)
Current Source Accuracy (100µA Range)	±(0.035% + 60 nA)
Current Source Accuracy (1mA Range)	±(0.035% + 600 nA)
Current Source Accuracy (10mA Range)	±(0.035% + 6 µA)
Current Source Accuracy (100mA Range)	±(0.045% + 60 µA)
Current Source Accuracy (1A Range)	±(0.08% + 600 µA)
Current Source Accuracy (5A Range)	±(0.1% + 2.4 mA)
Voltage Compliance Range	200 µV to 42.0 V
Current Compliance Range	10 nA to 5.25 A
Source Delay Range	0 to 9999.999 s
Source Delay Resolution	100 µs

Measure Specifications

Parameter	Value
Voltage Measure Ranges	200mV, 2V, 20V, 40V
Current Measure Ranges	10µA, 100µA, 1mA, 10mA, 100mA, 1A, 5A
Voltage Measure Resolution (200mV Range)	1 µV
Voltage Measure Resolution (2V Range)	10 µV
Voltage Measure Resolution (20V Range)	100 µV
Voltage Measure Resolution (40V Range)	1 mV
Current Measure Resolution (10µA Range)	100 pA
Current Measure Resolution (100µA Range)	1 nA
Current Measure Resolution (1mA Range)	10 nA
Current Measure Resolution (10mA Range)	100 nA
Current Measure Resolution (100mA Range)	1 µA
Current Measure Resolution (1A Range)	10 µA
Current Measure Resolution (5A Range)	100 µA
Voltage Measure Accuracy (200mV Range)	±(0.012% + 300 µV)
Voltage Measure Accuracy (2V Range)	±(0.012% + 300 µV)
Voltage Measure Accuracy (20V Range)	±(0.015% + 1.5 mV)
Voltage Measure Accuracy (40V Range)	±(0.015% + 3 mV)
Current Measure Accuracy (10µA Range)	±(0.025% + 1.5 nA)
Current Measure Accuracy (100µA Range)	±(0.025% + 15 nA)
Current Measure Accuracy (1mA Range)	±(0.025% + 150 nA)
Current Measure Accuracy (10mA Range)	±(0.025% + 1.5 µA)
Current Measure Accuracy (100mA Range)	±(0.025% + 15 µA)
Current Measure Accuracy (1A Range)	±(0.035% + 1.5 mA)
Current Measure Accuracy (5A Range)	±(0.08% + 3.5 mA)
Input Impedance (200mV and 2V Ranges)	>10^10 Ohms

Resistance Measure Specifications

Parameter	Value
Resistance Measure Ranges	2.0 Ohms to 2.0 MOhms
Resistance Measure Accuracy (2 Ohm Range)	±(0.10% + 0.003 Ohm)
Resistance Measure Accuracy (20 Ohm Range)	±(0.08% + 0.03 Ohm)
Resistance Measure Accuracy (200 Ohm Range)	±(0.07% + 0.3 Ohm)
Resistance Measure Accuracy (2 kOhm Range)	±(0.07% + 3 Ohm)
Resistance Measure Accuracy (20 kOhm Range)	±(0.07% + 30 Ohm)
Resistance Measure Accuracy (200 kOhm Range)	±(0.11% + 300 Ohm)
Resistance Measure Accuracy (2 MOhm Range)	±(0.11% + 3 kOhm)

Dynamic & Sweep Capabilities

Parameter	Value
Sweep Types	Linear, Log, Custom, Source-Memory
Source-Memory Buffer Size	100 points
Data Buffer Size	5000 readings

System Speeds & Timing

Parameter	Value
Max Reading Rate to Memory	2081 readings/second
Max Reading Rate to GPIB	1750 readings/second
Integration Time (NPLC)	0.01 NPLC to 10 NPLC

Connectivity & Control Interfaces

Parameter	Value
Sense Connections	2-wire local or 4-wire remote sense
Output Terminal Types	Front and rear panel safety banana jacks
Active Guard Terminals	Guard terminal available on front and rear panels
Digital I/O Port	4-bit input/output, DB-9 female connector
Trigger Link Connectors	8-pin micro-DIN

Environmental & Safety Standards

Parameter	Value
Maximum Common Mode Voltage	250 V DC
Warm-up Time	1 hour
Operating Humidity Range	70% R.H. non-condensing at up to 35°C (derated above 35°C)
Storage Temperature Range	-25°C to 65°C
Calibration Cycle Interval	1 Year

Power & Physical Characteristics

Parameter	Value
Benchtop/Rackmount Configuration	Benchtop with removable bumpers, or 2U half-rack rackmountable

Source Performance

Parameter	Value
Voltage Source Overshoot	< 0.1% typical (full scale step, resistive load)
Current Source Overshoot	< 0.1% typical (full scale step, resistive load)
Voltage Source Settling Time	< 250 µs typical (to 0.1%)
Current Source Settling Time	< 250 µs typical (to 0.1%)
Voltage Source Noise (0.1Hz - 10Hz, 200mV Range)	5 µV p-p
Voltage Source Noise (0.1Hz - 10Hz, 2V Range)	50 µV p-p
Voltage Source Noise (0.1Hz - 10Hz, 20V Range)	500 µV p-p
Voltage Source Noise (0.1Hz - 10Hz, 40V Range)	1 mV p-p
Maximum Capacitive Load	Stable into 20,000 pF typical

Guard Terminals

Parameter	Value
Guard Offset Voltage	< 150 µV typical
Maximum Guard Output Current	100 mA

System Specifications

Parameter	Value
Over Range Limit	105% of range (source and measure, except 5A range)
Over Range Limit (5A Range)	100.5% of range (source and measure)

Digital I/O

Parameter	Value
Digital I/O +5V Output Current Limit	150 mA (maximum combined current)

Environmental

Parameter	Value
Maximum Altitude	2,000 m (6,562 ft) above sea level
Vibration Specification	MIL-PRF-28800F Class 3 Random

Compliance & Safety

Parameter	Value
Safety Compliance	Conforms to European Union Low Voltage Directive; UL 3111-1; CSA C22.2 No. 1010.1; EN 61010-1
EMC Compliance	Conforms to European Union EMC Directive

Technology

Source Measure Unit (SMU)

Applications

Semiconductor testing, high-brightness LED test, power-device characterization, battery testing