Home Preamplifiers SRS SR552 BJT Input Preamplifier

SRS SR552 BJT Input Preamplifier

Product Code:
14990
Manufacturer: Stanford Research Systems
  • 1.4 nV/√Hz input noise
  • BJT input, 100 MΩ input impedance
  • Gain of 10, 20, 50 or 100
  • Single-ended and differential inputs
  • AC coupled input
  • Powered by SRS lock-in amplifiers

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The Stanford Research Systems SR552 Voltage Preamplifier is designed to work with SRS lock-in amplifiers, providing gain where it is needed most—right at the experiment. The preamplifier minimises noise and pickup in the connecting ines and can reduce measurement time in noise-limited experiments.

The SRS SR552 differs from the SR550 in its bipolar front-end design. The SR552 has a lower input noise and a correspondingly lower input impedance (100 kΩ vs. 100 MΩ) than the SR550. 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, +5 VDC).

Input impedance 100 MΩ + 25 pF
Inputs Single-ended or differential
Maximum input 70 mVrms for overload 50 VDC, 20 VAC damage threshold
Noise (typ.) 1.4 nV/√Hz at 1 kHz
  1.6 nV/√Hz at 100 Hz
  2.5 nV/√/Hz at 10 Hz
Coupling AC (0.016 Hz)
CMRR (1V input) 100 dB at 100 Hz
Gain 10, 20, 50, 100 (automatically set by SR510 or SR530 lock-in amplifier)
Full scale input 10 nV to 200 mV
Gain accuracy 2 % (2 Hz to 100 kHz)
Gain stability 200 ppm/°C
Outputs A (signal, 600 Ω, single-ended)
  B (shielded ground)
Maximum output 10 Vpp
Power Supplied by SR510, SR530, SR810, SR830 or SR850 via connector cable
Dimensions 3.0" × 1.3" × 5.1" (WHL)
Weight 1 lbs.
Warranty One year parts and labor on defects in materials and workmanship
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