The Stanford Research SR554 is a low-noise, transformer-coupled
preamplifier optimized for source impedances between 0.05 Ω and 1 kΩ. With an input noise of only 0.1 nV/√Hz,
the SR554 can be used in a wide range of low-noise applications. It is the ideal preamplifier for low-temperature
synchronous detection applications where isolation between the experimental sample and the lock-in amplifier
SRS SR554 quotation today.
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The SR554 can operate in one of two modes. In the "bypassed" mode,
the instrument is simply a passive transformer with a turns ratio of 100, providing an overall voltage gain
of 100. In the "non-bypassed" mode, an additional amplifier with a gain of 5 is added increasing the gain to
500 and providing a low-impedance (<1 Ω) output. In the bypassed mode, the SR554 requires no external power.
When using the output amplifier, ±20 VDC must be supplied. The preamplifier connector on SRS lock-ins can be
used to power the SR554.
SRS SR554 Features
- 0.1 nV/√Hz input noise
- 0.1 Hz to 40 kHz bandwidth
- Transformer-coupled input
- Gain of 100 or 500
- Single-ended and differential inputs
- >40 dB isolation (DC to 500 MHz)
- Powered by SRS lock-ins
Ask for SRS SR554 detailed specification.