SR552 — BJT Input Preamplifier

The 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 minimizes noise and pickup in the connecting lines and can reduce measurement time in noise-limited experiments.



SR552 Specifications

Input impedance 100 kΩ + 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/√z at 100 Hz
2.5 nV/√Hz at 10 Hz
Coupling AC (0.016 Hz)
CMRR (1 V input) 100 dB at 100 Hz
Gain 10, 20, 50, 100 (automatically set by SR510 or SR530 lock-in)
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 or SR124 via control cable
Dimensions 3.0″ × 1.3″ × 5.1″ (WHL)
Weight 1 lbs.
Warranty One year parts and labor on defects in materials and workmanship