SRS
SR552 – BJT input preamplifier
Overview
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.
Feature
• 1.4 nV/√Hz input noise
• BJT input, 100 kΩ input impedance
• Gain of 10, 20, 50 or 100
• Single-ended and differential inputs
• AC coupled input
• Powered by SRS lock-in amplifiers
Technical Specifications
General
Input impedance: 100 k? + 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 ?, 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
Others
N/A
