Stanford SR550 and SR552 Input Voltage Preamplifier
Stanford SR550 and SR552 Input Voltage Preamplifier
Minimises noise and pickup in the connecting lines
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, 100 MΩ 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 (±20VDC, +5VDC).
For further information please contact us or download the SR550 or SR552 datasheet.