SR552 BJT Input Preamplifier0 pages

Lock-In Preamplifier
SR552 — BJT input 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
· AC coupled input
· Powered by SRS lock-in amplifiers

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 has a bipolar front-end design (100 kΩ impedance,
1.4 nV/√Hz noise). 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).

· SR552 ... $750 (U.S. list)

SR552 Specifications
1MΩ

Source Resistance

100 k Ω

Input impedancet
100 kΩ + 25 pF
Inputst
Single-ended or differential
Maximum inputt
70 mVrms for overload
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50 VDC, 20 VAC damage threshold
Noise (typ.)t
1.4 nV/√Hz at 1 kHz
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1.6 nV/√Hz at 100 Hz
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2.5 nV/√Hz at 10 Hz
Couplingt
AC (0.016 Hz)
CMRR (1 V input)t
100 dB at 100 Hz
Gaintt
10, 20, 50, 100 (Automatically set t
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by SR510 or SR530 lock-in)
Full-scale inputt
10 nV to 200 mV
Gain accuracyt
2 % (2 Hz to 100 kHz)
Gain stabilityt
200 ppm/°C
Outputst
A (signal, 600 Ω, single-ended)
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B (shielded ground)
Maximum outputt
10 Vpp
Powert
Supplied by SR510, SR530, SR810, t
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SR830, SR850 or SR124 via
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control cable
Mechanicalt3.0" × 1.3" × 5.1" (WHD)
Weightt1 lbs.
Warrantyt
One year parts and labor on defects t
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in materials and workmanship

10 dB

10 k Ω

3 dB
1 dB

1kΩ
3 dB

100 Ω
10 dB

10 Ω
20 dB

1Ω
1 Hz

10 Hz

100 Hz

1 kHz

10 kHz

100 kHz

Frequency

SR552 noise contour
8
7

Noise (nV/ √ Hz)

6
5
4
3
2
1
0
1 Hz

10 Hz

100 Hz

1 kHz

10 kHz

100 kHz

Frequency

Ordering Information

SR552 noise plot

Stanford Research Systemstt
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SR552 t

Lock-in preamplifiert

$750

phone: (408)744-9040
www.thinkSRS.com