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Voltage Controlled Current Source CS580 ... from $2495
CS580 Current source
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CS580 Voltage Controlled Current Source
  • AC and DC current source
  • Sources/sinks current - true four quadrant operation
  • current from 100 fA to 100 mA
  • Up to 200 kHz bandwidth
  • ±50 V compliance voltage
  • 1 nA/V to 50 mA/V gain
  • Low thermal drift
  • RS-232 and Optical fiber interfaces
The Model CS580 Voltage Controlled Current Source creates new capabilities for researchers needing an ultra-low noise current source in a flexible, easy to use instrument.  The CS580 is a natural companion with sensitive AC instruments such as lock-in amplifiers, providing an easy way of generating precision current directly from an AC or DC control voltage.  Current is both sourced and sinked with adjustable compliance voltage up to ±50 V, giving full “four-quadrant” performance.  The CS580 is a welcome addition to any research lab studying semiconductors and transport phenomena, superconductivity, and nanotechnology, to name just a few.  
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CS580 Voltage Controlled Current Source

The Model CS580 Voltage Controlled Current Source creates new capabilities for researchers needing an ultra-low noise current source in a flexible, easy to use instrument.  The CS580 is a natural companion with sensitive AC instruments such as lock-in amplifiers, providing an easy way of generating precision current directly from an AC or DC control voltage.  Current is both sourced and sinked with adjustable compliance voltage up to ±50 V, giving full “four-quadrant” performance.  The CS580 is a welcome addition to any research lab studying semiconductors and transport phenomena, superconductivity, and nanotechnology, to name just a few.

Ultra-Low Noise Design

With up to ±50 V compliance voltage, the CS580 can source and sink precision AC and DC currents from 100 fA to 100 mA. The CS580's ultra-low noise design takes advantage of the best transistors, op-amps, and discrete components available combined with careful high impedance board layout to achieve the highest performance possible. The design even features linear power supplies rather than switching power supplies, so switching frequency interference can never be a problem.

An actively driven guard provides the greatest bandwidth (up to 200 kHz) and lowest possible leakage current. There's also a buffered monitor output for high impedance voltage measurements.

CPU Clock Stopping Architecture

Front-panel instrument configuration is managed by a microcontroller whose system clock only oscillates during the brief moments needed to change instrument settings. The drive electronics are completely static, with no “scanning” or refresh to generate the slightest interference.

Whenever the microcontroller becomes active, the “CPU Activity” indicator illuminates, clearly showing when the digital clock is running. This occurs in response to front-panel button presses or remote computer commands. But when the microcontroller is not active, there is absolutely no digital interference at all.

RS-232 and Optical Fiber Interfaces

There is an RS-232 computer interface on the rear panel of the CS580. All functions of the instrument can be set or read via the interface. When sending commands to the instrument, the CS580's microcontroller will be activated, and digital noise may be present.

For remote interfacing with complete electrical isolation, the CS580 also has a rear-panel fiber optic interface. When connected to the SX199 Remote Computer Interface Unit, a path for controlling the CS580 via GPIB, Ethernet, and RS-232 is provided.

 

 

 

 

 

 

Phone: (408)744-9040 • Fax: (408)744-9049 • email: info@thinkSRS.comwww.thinkSRS.com

CS580 Voltage Controlled Current Source
Output
Compliance voltage 0 to 50 V (bipolar)
Compliance voltage error 0.5 % + 50 mV
DC output resistance 1012 Ω (1 nA/V gain)
Output capacitance <12 pF (filter off), <500 pF (filter on)
Guard output -50 V to + 50 V, 5 kΩ internal resistance
Output power 5 W (four quadrant sourcing/sinking)
THD 0.05 % typ.
Output connector 3-lug Triax for current output. Banana jacks for load voltage monitoring
Common mode voltage 250 Vrms (DC to 60 Hz)
Common mode isolation >1 GΩ, <1 nF
Input
Input range -2 V to +2 V
Input impedance 100 kΩ
Input connector BNC
Remote Interfaces
RS-232 DB-9 connector, 9600 baud
Optical fiber Connection to SX199 Optical Interface Controller. Provides connectivity to GPIB, RS-232 and Ethernet
General
Operating temperature 0 °C to 40 °C, non-condensing
Power <30 W, 100/120/220/240 VAC, 50 Hz or 60 Hz
Dimensions 8.3" × 3.5" × 13.0" (WHL)
Weight 10 lbs.
Warranty One year parts and labor on defects in materials and workmanship
   
BNC analog input (AC & DC)
Gain Max Output Bandwidth (0 Ω load, typ.) Gain Accuracy
1 nA/V 2.2 nA 5 kHz 1.2 %
10 nA/V 22 nA 10 kHz 1.2 %
100 nA/V 220 nA 20 kHz 1.2 %
1 µA/V 2.2 µA 75 kHz 0.5 %
10 µA/V 22 µA 150 kHz 0.5 %
100 µA/V 220 µA 150 kHz 0.5 %
1 mA/V 2.2 mA 150 kHz 0.5 %
10 mA/V 22 mA 200 kHz 0.5 %
50 mA/V 110 mA 150 kHz 1 %
 
Gain drift 200 ppm/°C
Offset 3 mV (referred to input)
Offset drift 1 mV/°C (referred to input)
Internal DC current source
Gain Max Output DC accuracy Resolution Drift (typ.)
1 nA/V 2 nA 0.5 % + 10 pA 100 fA 100 ppm/°C + 100 fA/°C
10 nA/V 20 nA 0.5 % + 10 pA 1 pA 100 ppm/°C + 200 fA/°C
100 nA/V 200 nA 0.5 % + 100 pA 10 pA 100 ppm/°C + 2 pA/°C
1 µA/V 2 µA 0.1 % + 1 nA 100 pA 50 ppm/°C + 20 pA/°C
10 µA/V 20 µA 0.1 % + 10 nA 1 nA 50 ppm/°C + 200 pA/°C
100 µA/V 200 µA 0.1 % + 100 nA 10 nA 50 ppm/°C + 2 nA/°C
1 mA/V 2 mA 0.1 % + 1 µA 100 nA 50 ppm/°C + 20 nA/°C
10 mA/V 20 mA 0.1 % + 10 µA 1 µA 50 ppm/°C + 200 nA/°C
50 mA/V 100 mA 0.1 % + 50 µA 10 µA 50 ppm/°C + 1 µA/°C
Noise
Gain Noise density
(Input off)
Noise density
(Input on)
Noise (rms, input off)
(0.1 Hz to 10 Hz)
Noise (rms, input off)
(>10 Hz)
1 nA/V 10 fA/√Hz 10 fA/√Hz 20 fA 50 pA
10 nA/V 20 fA/√Hz 20 fA/√Hz 80 fA 50 pA
100 nA/V 60 fA/√Hz 60 fA/√Hz 400 fA 300 pA
1 µA/V 300 fA/√Hz 400 fA/√Hz 4 pA 1 nA
10 µA/V 3 pA/√Hz 4 pA/√Hz 40 pA 5 nA
100 µA/V 30 pA/√Hz 40 pA/√Hz 400 pA 40 nA
1 mA/V 300 pA/√Hz 400 pA/√Hz 4 nA 400 nA
10 mA/V 3 nA/√Hz 4 nA/√Hz 40 nA 4 µA
50 mA/V 15 nA/√Hz 20 nA/√Hz 200 nA 20 µA
 
 
 
 
Phone: (408)744-9040 • Fax: (408)744-9049 • email: info@thinkSRS.comwww.thinkSRS.com