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- 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
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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 ines 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).
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| Specifications |
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| General |
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| 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
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| 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 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 |
Stanford Research Systems, Inc. • 1290-D
Reamwood Ave., Sunnyvale, CA 94089
Phone: (408) 744-9040 • Fax: (408) 744-9049 • email: info@thinkSRS.com
• www.thinkSRS.com
© Stanford Research Systems, Inc. 2003
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