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Stanford SR550 and SR552 Input Voltage Preamplifier

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Stanford SR550 and SR552 Input Voltage Preamplifier

Stanford Research Systems

The SR550 FET Input and SR552 BJT Input Voltage Preamplifiers are designed to work with any Stanford lock-in amplifier, providing gain where it is needed most - right at the experiment. These preamplifiers minimise noise and pick up in the connecting lines and can reduce measurement time in noise-limited experiments. The SR552 differs from the SR550 in its bipolar front-end design. The SR552 has a lower input noise and a correspondingly lower input impedance than the SR550.

SR550

  • 3.6nV/√Hz input noise
  • FET intput, 100MΩ input impedance
  • Gain of 1, 2, 5 or 10
  • Single-ended and differential inputs
  • AC coupled input
  • Powered by SRS lock-in amplifiers
  • High common mode rejection

SR552

  • 1.4 nV/√Hz input noise
  • BJT input, 100kΩ input impendance
  • Gain of 10, 20, 50 or 100
  • Single-ended and differential inputs
  • AC coupled input
  • Powered by SRS lock-in amplifiers

When used with the SR510 or SR530, the preamplifier gain is automatically set by the lock-in. When used with the SR850, SR810 or SR830, the gain is always set to 100. Power and control signals are brought from the lock-in by a 9-pin cable (included). The SR552 may also be operated independently by applying appropriate power supply voltages (20±VDC, +5VDC)

For further information please contact us or download the SR550 or SR552 datasheet.

                                        

      SR550 datasheet                                                     SR552 datasheet

   Read more on Stanford's website