SRS SR555 Current Preamplifier
- 10V/µA fixed gain
- 120 kHz bandwidth
- Bias voltage input
- Powered by SRS lock-in amplifiers
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Additional 12 months warranty for free (2 years total) via our UK Service Centre.
The Stanford Research Systems (SRS) SR555 is a low-noise, high-bandwidth, 10V/µA fixed-gain current (trans-impedance) amplifier designed to work with SRS lock-in amplifiers.
These current amplifiers are designed to be placed close to the experimental detector, providing gain close to the source and allowing the user to minimise input cable length and its corresponding input capacitance. The SR555 minimises noise and pickup before they permanently degrade the signal-to-noise ratio, reducing measurement time in noise-limited experiments.
This preamplifier takes its power from a Stanford Research lock-in amplifier like the SR865 or SR830, via a 9-pin cable. The SR555 can also be operated independently by applying the appropriate DC power.
| General | |
| Gain | 107 V/A |
| Bandwidth | 120 kHz (–3 dB) |
| Input noise (typ.) |
42 fA/√Hz at 1 kHz |
| Current input | |
| Impedance | <50Ω |
| Bias current | <3 pA |
| DC bias input | |
| Range | ±5 VDC |
| Settling time | <150 ms |
| Impedance | 1 Ω |
| Gain accuracy | 1 % |
| Gain stability | ±50 ppm/°C |
| Output | 20 Vpp max. balanced differential 10 mA max., 50Ω |
| Power | Supplied by SR510, SR530, SR810, SR830, SR850 or SR124 via control cable |
| Mechanical | 3.0" × 1.3" × 5.1" (WHD) |
| Weight | 10 oz. |
| Warranty | One year parts and labor on defects in materials and workmanship |
Stanford Research Systems SR555 datasheet | Photo | Product | SKU | |
|---|---|---|---|
 | SRS SR560 Low-Noise Voltage Preamplifier | - | > |
 | SRS SR570 Low Noise Current Preamplifier | - | > |
 | SRS SR446 - 400 MHz Preamplifier | - | > |
 | SRS SR445A Quad 350 MHz Preamplifier | - | > |
 | SRS SR550 FET Input Preamplifier | - | > |
 | SRS SR552 BJT Input Preamplifier | - | > |
 | SRS SR554 Transformer Preamplifier | - | > |
 | SRS SR556 Current Preamplifier | - | > |
