SR552 - BJT Input Voltage Preamplifier

1.4 nV/√Hz input noise BJT input, 100 kΩ input impedance Gain of 10, 20, 50 or 100 Single-ended and differential inputs Powered by SRS lock-in amplifiers 100 kΩ (BJT) input impedance Single-ended/differential inputs Powered by SRS lock-ins 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. Signal Recovery with PMTs SR865A Lock-In Amplifier SR830 Lock-In Amplifier SR2124 Lock-In Amplifier SR860 Lock-In Amplifier Signal Recovery — PMTs SR865A Lock-In Amp. SR830 Lock-In Amp. SR2124 Lock-In Amp. SR860 Lock-In Amp. SR552 BJT 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. 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 (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). Noise vs. Frequency X Noise vs. Frequency SR552 BJT Preamplifier Noise Figure Contour X Noise Figure Contour SR552 BJT Preamplifier Noise Figure Contour SR552 Specifications Single-ended or differential 70 mVrms for overload, 50 VDC, 20 VAC damage threshold 1.4 nV/√Hz at 1 kHz 1.6 nV/√z at 100 Hz 2.5 nV/√Hz at 10 Hz 10, 20, 50, 100 (automatically set by SR510 or SR530 lock-in) 2 % (2 Hz to 100 kHz) A (signal, 600 Ω, single-ended) B (shielded ground) Supplied by SR510, SR530, SR810, SR830 or SR850 or SR2124 via control cable 3.0" × 1.3" × 5.1" (WHL) One year parts and labor on defects in materials and workmanship