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srs SR556-Current preamplifier

主要指標與說明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.

SR556 Current Preamplifier1 V/nA fixed gain5 fA/√Hz input noiseBias voltage inputPowered by SRS lock-in amplifiersSR556 Current PreamplifierThe 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. SR556 FET PreamplifierGeneralGain 109 V/ABandwidth 3 kHz (-3 dB)Input noise (typ.) 5 fA/√Hz at 1 kHzCurrent input Impedance 50 Ω Bias current<3 pADC bias input Range ±5 VDC Settling time <250 ms Impedance 1 MΩGain accuracy 1 %Gain stability ±50 ppm/°COutput 20 Vpp max. balanced differential10 mA max., 50 ΩPower Supplied by SR510, SR530, SR810, SR830 or SR850 or SR124 via connector cableDimensions 3.0" × 1.3" × 5.1" (WHD)Weight 10 oz.Warranty One year parts and labor on defects in materials and workmanship

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