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Preamplifier SR556 ... from $1095
SR556 Current preamplifier
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SR556 Current Preamplifier
  • 1 V/nA fixed gain
  • 5 fA/√Hz input noise
  • Bias voltage input
  • Powered by SRS lock-in amplifiers
The SR556 is a low-noise, high-bandwidth, fixed-gain current (trans-impedance) amplifier designed to work with SRS lockin amplifiers. Current amplifiers provide gain close to the experimental detector, allowing the user to minimize input cable length and its corresponding input capacitance. The SR556 minimizes noise and pickup before they permanently degrade the signal-to-noise ratio, reducing measurement time in noise-limited experiments.
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> SR555 Current Preamplifier
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SR556 Current Preamplifier

The SR556 is a low-noise, high-bandwidth, fixed-gain current (trans-impedance) amplifier designed to work with SRS lockin amplifiers. Current amplifiers provide gain close to the experimental detector, allowing the user to minimize input cable length and its corresponding input capacitance. The SR556 minimizes noise and pickup before they permanently degrade the signal-to-noise ratio, reducing measurement time in noise-limited experiments. Power is brought from the lock-in by a 9-pin cable. The SR556 can also be operated independently by applying the appropriate DC power.

 

 

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

SR556 FET Preamplifier
General
Gain 109 V/A
Bandwidth 3 kHz (-3 dB)
Input noise (typ.) 5 fA/√Hz at 1 kHz
Current input
     Impedance 50 Ω
     Bias current <3 pA
DC bias input
     Range 5 VDC
     Settling time <250 ms
     Impedance 1 MΩ
Gain accuracy 1 %
Gain stability 50 ppm/C
Output 20 Vpp max. balanced differential
10 mA max., 50 Ω
Power Supplied by SR510, SR530, SR810, SR830 or SR850 or SR124 via connector cable
Dimensions 3.0" × 1.3" × 5.1" (WHD)
Weight 10 oz.
Warranty One year parts and labor on defects in materials and workmanship
 
 
 
Phone: (408)744-9040 • Fax: (408)744-9049 • email: info@thinkSRS.comwww.thinkSRS.com