LFLNA-80: Low-Frequency Low-Noise Amplifier 80 dB
499.00CHF
Introducing our ultra-low noise amplifier (LNA) designed to measure voltage references in the range of 0.1 to 10 Hz with unparalleled accuracy and speed. Our AC-coupled LNA is equipped with an active leakage compensation loop, enabling it to settle in mere minutes, compared to several hours with traditional LNA. With a noise level of only 13 nVrms, our LNA delivers exceptional signal fidelity, making it the perfect choice for critical measurements in low-frequency applications.
Our Low-Noise Low-Frequency Amplifier is perfect for measuring the noise in the 0.1 Hz to 10 Hz band, where flicker noise obscures other amplifiers. Our AC coupling implements an active leakage current compensation that eliminates waiting times when measuring different DC levels, helping you save time and money. In the picture below, an voltage step from 0 to 10 V is applied to the input, taking less than 2 minutes for the output to settle and complete the measurement.
Here is a review of our LFLNA-80 by Marco Reps:
Here is an example of noise spectral density of multiple voltage references obtained by our LFLNA-80 amplifier as measured by one of our clients:
The plot is reproduced from a master thesis by Hrusovsky D.: Voltage standard 10V [Link]
Here is a demonstration of the active compensation taking the amplifier out of saturation in 2 minutes after applying a 10 V step to the input:
Main features
- x10000 (80 dB) gain from 0.1 to 10 Hz (-3 dB)
- 13 nVrms input referred noise
- Delivered with fully characterize datasheet (Noise Spectral Density + Frequency Response)
- Input leakage current compensation loop allows fast measurement of different DC levels with maximum 2 minutes of stabilization time
- Internal replaceable lithium ion battery provides more than 250 hours of battery life
- The internal battery can be recharged through the output BNC with the included cabl
Example Frequency Response:
Example Noise Spectral Density
Additional information
| Weight | 0.97 kg |
|---|---|
| Status | New, Refurbished |
Specifications
- Input referred RMS noise: 12.5 nVrms (typical)
- Bandwidth: 0.1 to 10 Hz (-3dB)
- Gain: 10 000 (80 dB)
- Internal battery: Panasonic NCR18650B
- Operating temperature: 0 ºC to 50 ºC
- Instrument size (bounding box):
- Carrying case size (bounding box):
Contents
- 1x LFLNA-80 amplifier
- 1x Carrying case
- 1x Charging cable BNC to bananas
- 1x Noise SPD Chart and Frequency Response Bode for the specific unit
Downloads
No files are available for now. Please, contact us for further information.
3 reviews for LFLNA-80: Low-Frequency Low-Noise Amplifier 80 dB
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Ioannis Doukakis (verified owner) –
The amplifier worked perfectly. I tried with known good quality references, like ADR1399 and the noise figure measured using my RTB2004 scope, were close to the numbers specified in the Datasheets.
After that I used it for what I bought it, which was to compare the noise of various lower-quality references and DACs, where the manufacturers did not specify, or did not clearly specified low frequency noise.
Although it is a highly specialized tool, it does what it is designed to do and well.
A small detail I noticed, is that within the first minute or less, where the DC stabilizes, it shows much less noise than after stabilization. Therefore the user should be patient and let things stabilize before trusting the results.
Checksum EEVBlog Forum Member –
I spent the last week working with an LFLNA-80 that was ordered a few days after seeing Marco Reps YouTube review. It’s proving to be simple, reliable and repeatable as a measurement tool for trouble shooting low noise supplies.
Shortly before I bought an Alpha LNA-10 but found the AC coupled noise floor was that bit too high (~5uV p-p) for the work I had in mind. Despite this, the LNA-10 has more than proved it worth for its ability to reject common mode noise whilst making measurements. Its the first differential probe I have owned, so getting clean measurements with the LNA-10 where CM noise between DUT and scope / analyser would previously have ruined them still feels very novel :).
The LFLNA-80 feeding the LNA-10 probe in differential mode gives almost no drift at all and resolution to measure down to ~100nV. The main benefit for me is that this spares the complication of isolating (with batteries etc) the DUTs I am working with from their mains powered environments. It works a treat, both the scope and DUT are mains connected and the measurements are rock solid down to the 100nv noise floor.
The build feel and operation of the LFLNA-80 are really good too. IMHO a good product, very pleased to have taken the plunge.
Mike Johnson –
Recently, I needed to find a very low noise 1N829 Zener diode to replace the one in a Solartron 7081 multimeter which had unfortunately failed. After finding some new old stock diodes, I ordered six of them and created a test rig so that I could power them up and age them for some 2000 hours before investigating further. At the same time, I also ordered an LFLNA-80 on the strength of Marco Reps’ review.
Now my diodes have been aged, I have started to examine the noise from the best two out of the six that I started with and the LFLNA-80 has proved to be an invaluable tool. Partnered with my Rigol DHO804 and a precision current source, I have used the LNA to confirm that the best diode has a noise level of just 0.5µV. Some more experimentation is now needed to find the ideal current, but the LFLNA-80 was an essential tool in this process.
So, if you need to measure low frequency noise at well under microvolt levels, then Euler Precision have created a solidly built and well engineered tool which settles very quickly and is a real pleasure to use.