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SRS CS580 Voltage Controlled Current Source, ±50 V, 100fA to 100mA

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Availability: In stock

Excl. VAT: £2,842.00 Incl. VAT: £3,410.40
Product Code: 51649
Manufacturer: Stanford Research Systems

The SRS CS580’s low cost ultra-low noise design makes this a low cost alternative to more expensive competitor models on the market.


With up to ±50 V compliance voltage, the CS580 can source and sink precision AC and DC currents from 100 fA to 100 mA.  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.



  • Sources/sinks current from 100 fA to 100 mA

  • ±50 V compliance voltage

  • 1 nA/V to 50 mA/V gain

  • 5 W max power

  • RS-232 and optical fiber interfaces

  • Low thermal drift

  • Up to 150 kHz bandwidth

  • Supplied with 6ft triax-to-alligator cable


 

The SRS Model CS580 Voltage Controlled Current Source creates a new capability for researchers needing ultra-low current noise in a flexible, easy to use instrument. The CS580 is a natural companion product for use with sensitive AC instruments such as lock-in amplifiers, providing a straightforward method for generating precision low-noise currents directly from an AC or DC control voltage. Current is both sourced and sinked with adjustable compliance voltage up to ±50 V, giving full “fourquadrant” 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 150 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 SRS 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.

 

Additional Information

 

Output

Compliance voltage

0 to 50 V (bipolar)

Compliance error

0.5 % + 0.2 V

DC output resistance

1012 Ω (1 nA/V gain)

Output capacitance

 <10 pF (filter off), <50 pF (filter on)

Guard output

–50 V to +50 V, 5 kΩ internal resistance

Output power

5 W (four quadrant sourcing/sinking)

THD

0.01 % typ.

Output connector

3-lug Triax for current output. Banana jacks for load voltage monitoring

CM voltage

250 Vrms (DC to 60 Hz)

CM isolation

>1010 Ω, <0.5 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” (WHD)
Weight 15 lbs.
Warranty

One year parts and labor on defects in
materials and workmanship

   

AC Specifications

Gain

Max Output

Gain Error

Bandwidth 
(0 Ω load)

Typical Noise (p-p/RMS) 
(0.1 Hz to 10 Hz)

Typical Noise (RMS) 
(10 Hz to bandwidth)

 1 nA/V     

 2.2 nA

 1.2%  10 kHz  240 fA / 40 fA  <20 pA

 10 nA/V 

 22 nA  

 1.2%  10 kHz   600 fA / 100 fA  <20 pA

 100 nA/V    

 220 nA  1.0%  20 kHz   5 pA / 800 fA  40 pA

 1 μA/V     

 2.2 μA

 0.5%  150 kHz  50 pA / 8 pA  1 nA

 10 μA/V  

  22 μA 

 0.5%  300 kHz  500 pA / 80 pA   4 nA

 100 μA/V    

 220 μA

  0.5%  250 kHz 5 nA / 800 pA   40 nA

 1 mA/V    

 2.2 mA

 0.5%  250 kHz  50 nA / 8 nA   100 nA

 10 mA/V    

 22 mA 

 0.5%  250 kHz  500 nA / 80 nA  300 nA

 50 mA/V   

 110 mA 

  0.5%  150 kHz  5 μA / 400 nA  700 nA

DC Specifications

Gain   Max Output  Gain Error  Setting Resolution Thermal Drift
1 nA/V 2 nA  0.4 % + 1 pA 100 fA 100 ppm/°C
10 nA/V 20 nA 0.3 % + 10 pA 1 pA 100 ppm/°C
100 nA/V 200 nA 0.3 % + 100 pA 10 pA 100 ppm/°C
1 μA/V 2 μA 0.1 % + 1 nA  100 pA 10 ppm/°C
10 μA/V 20 μA  0.05 % + 10 nA 1 nA  10 ppm/°C
100 μA/V  200 μA  0.05 % + 1 pA 10 nA  10 ppm/°C
1 mA/V 2 mA 0.05 % + 1 pA   100 nA 10 ppm/°C
10 mA/V 20 mA    0.05 % + 1 pA 1 μA 10 ppm/°C
50 mA/V 100 mA 0.1 % + 1 pA 10 μA  10 ppm/°C

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