The Zurich Instruments MFLI is a digital lock-in amplifier that covers the frequency range from DC to 500 kHz (and up to 5 MHz when upgraded). Thanks to its embedded data and web servers, the MFLI can be used directly with any device running a web browser without further software installations. With its carefully developed analog and digital front ends and the fast digital processing afforded by the on-board FPGA, the MFLI combines its excellent performance with the LabOne user interface.
500 kHz / 5 MHz Lock-in Amplifier
- DC - 500 kHz, 60 MSa/s, 16 bits
- Optional upgrade to 5 MHz
- Current and differential voltage inputs
- AC line and DC supply (battery) operation
- USB 2.0 and 1 GbE high-speed connections
- Plug & Play with embedded LabOne® Web Server
- LabOne toolset including Scope, Sweeper, and Spectrum Analyzer
- Multi-Device Synchronization
- Functional Description
- Materials science: carrier mobility, carrier density, Hall effect
- Transport measurements: conductance measurements, 2- and 4-terminal resistors
- Absorption spectroscopy
- Sensing and actuation (MEMS): gyroscopes, resonators, accelerometers
- Quantum sensing and transport: quantum dots, qubits
- Magnetic sensing: SQUIDs, NV centers, atomic magnetometry, VSM
- Scanning microscopy: AFM, STM
- Noise characterization: noise density, cross-correlation measurements
With multi-device synchronization (MDS) it is possible to operate multiple MFLIs as a single multi-channel device:
- Operate all instruments from a single LabOne user interface and LabOne API.
- Lock in phase all instrument clocks and oscillators (stable phase relationship).
- Synchronize time stamps and sampling rates for automatic alignment of measurement data.
Read more about MDS here.
Front panel interface
The front panel of the MFLI features 1 current signal input, 1 differential voltage input, 1 differential signal output, 2 auxiliary inputs that can work as reference inputs, and 4 auxiliary outputs. Both signal inputs and outputs can be operated in single-ended and differential mode for experiments that require extra noise immunity. The signal ground can be referenced to the instrument ground or to the BNC shield of the signal inputs.
Back panel interface
The back panel offers additional BNC connectors comprising 2 trigger inputs, 2 trigger outputs, and 1 input and 1 output for 10 MHz clock synchronization. Moreover, a SCSI connector offers access to all DIO channels. The units can be operated with standard 90 - 240 V mains supply or by an external 12 V DC power supply (e.g., an external battery pack) to break up ground loops.
Voltage and current measurements
Voltage measurements and current measurements are both supported by the MFLI, but the simultaneous measurement of current and voltage requires the MF-MD Multi-Demodulator option. The analog front end features variable input impedance as well as AC/DC coupling selection, and the high-frequency analog to digital sampling provides a large oversampling factor. This ensures superior lock-in performance and high signal fidelity for the Scope.
The results of the lock-in measurement, i.e., X, Y, R, and Θ for each of the demodulators, can be used in the following ways:
- Analog output to any of the 4 auxiliary outputs on the front panel. Individual scaling and offsets can be set for each signal, and the 612 kSa/s sampling rate ensures that all demodulated signal components are reliably available on the physical connectors. The signal bandwidth is the same for all signals and can be as high as 200 kHz.
- Transfer to the host PC over USB 2.0 or 1 GbE for display on the LabOne user interface, where the measurement data can be analyzed with one of several LabOne tools or stored locally.
- Store on a USB mass storage device plugged into either of the two USB connectors.
|Storage temperature||+5°C to +65°C|
|Storage relative humidity||< 95%, non-condensing|
|Operating temperature||+5°C to +40°C|
|Operating relative humidity||< 90%, non-condensing|
|Specification temperature||+18°C to +28°C|
|Power consumption||< 40 W|
|DC power inlet||12 V, 2 A
Connector: Switchcraft 760BK, ID 2.5 mm, OD 5.5 mm
|Power supply AC line||100 - 240 V (±10%), 50/60 Hz|
|Line power fuse||250 V, 2 A, fast, 5 x 20 mm, F 2A L 250V|
|Dimensions including bumper||28.3 x 23.2 x 10.2 cm
11.1 x 9.1 x 4.0 inch
Rack mount on request
|Weight including bumper||3.8 kg|
|Recommended calibration interval||2 years (see sticker on back panel)|
|Warranty||1 year, extensible|
For the full list of specifications, please see MFLI and MFIA Specification.
No, variants are firmware- and software-based and can be implemented at a later time in the field.
The MFLI has an embedded web server, and can be connected to a local network where it can be accessed from any web browser by opening the address "http://mf-devXXXX.zhinst.com" (replacing XXXX with the serial number).
The key features of MFLI oscilloscope are:
- Single channel, up to 16 kSa samples per shot, 16-bit resolution (24-bit with BW limit)
- Sampling rates from 1.8 kSa/s to 60 MSa/s, up to 8.9 s acquisition time
- FFT of acquired scope shots with up to 30 MHz span (limited by 10 MHz analog input bandwidth (-3 dB))
- Multiple signal sources including signal inputs and trigger inputs, multiple trigger sources and trigger methods
- Independent hold-off, hysteresis, pre-trigger and trigger level settings
- Support for input scaling and arbitrary input units
The key features of MFLI Sweeper are:
- Full-featured parametric sweep tool for signal output frequency, signal output amplitude, signal output offset, signal output phase, offset voltage auxiliary output
- Recording parameters: demodulator data (X, Y, R, Θ), oscillator frequency, auxiliary inputs, etc.
- Application modes: parameter sweep, noise amplitude measurement, frequency response analyzer, 3-Omega-sweep
- Other features: logarithmic sweeps, automatic bandwidth adjustment, persistent display of previous scans, phase unwrap, etc.
The fastest and simplest way to get started is to connect the instrument to the local network by 1 GbE, open a browser on any device in the same network and type "mf-devXXXX:8006" into the browser address field.
Yes, the user receives the MFLI with LabOne installed; in addition, users have access to a free LabOne PC and/or Linux version for their instrument. With the LabOne Web Server running on a PC, higher data rates can be obtained. The Installation is also required for API connection.
Yes, by using 10 MHz clock signals each instrument can serve as a reference or accept an external reference. Please inquire for more information: Contact Form.
Please get in touch: Contact Form.
All users receive support from Zurich Instruments independently onwhere the purchase took place. Local sales partners, where available, also provide first-level support in the local language. For extended support, instrument calibration or service, please check the Support page for more information.
There is an embedded computer that runs Linux and provides data server and web server capabilities.
On a specific partition on the internal flash drive, on an external PC in the same network, or on a storage device attached to one of the MFLI's USB connectors.
Yes, either locally on the MFLI or on any PC in the same network.
Yes, by using the configuration files available on the internal memory.
Yes, that can help to achieve higher data rates for some applications.
No, at the moment the data server runs exclusively on the embedded PC.
The instrument comes with a country specific power cable, a USB cable, and a printed quick start guide.
The LabOne user interface allows to check for updates, upload them onto the instrument and initiate the update procedure.
The system can be set into its original state by downloading a software to a USB stick, attach the USB stick to the MFLI and restart the instrument. Measurement data and configuration files will be untouched.
USB 2.0 is implemented. The operation requires a driver installation. USB 3.0 is not supported.
Yes. All demodulator data samples (X, Y, R, Θ, demodulator frequency) can be quantitatively analyzed in multiple ways in both time domain and frequency domain.
A minimum distance to the external casing is required to assure a proper air circulation around the instrument. A sufficient air exchange is recommended for avoiding heat accumulation.