Lock-In Amplifier Modules LIA-MV-150

Features

  • Current and voltage input
  • Working frequency up to 45 kHz
  • Adjustable sensitivity, time constant and phase
  • Local and remote control
  • Compact and EMI-shielded case
FEMTO Lock-In Amplifier Module LIA-MV-150
Model LIA-MV-150-S Single-ended LIA-MV-150-D Symmetric / Differential
Voltage Input BNC socket, single-ended, noise 12 nV/√Hz Lemo®socket, differential, noise 12 nV/√Hz
Current Input BNC socket, gain 1 kV/A, noise 13 pA/√Hz Lemo®socket, gain 1kV/A, noise 13 pA/√Hz
Input Sensitivity (Full Scale) voltage: 3 µV bis 100 mV, current: 3 nA bis 100 µA, switchable in steps of 1-3-10
Working Frequency 10 Hz - 45 kHz
Reference Input ±100 mV to ±5 V, switchable to TTL
Phase adjustable 0° – 360° (8-bit resolution), temperature drift <0,01°/K
Demodulator Dynamic Reserve 35 dB @ low drift setting, 55 dB @ high dynamic setting
Time Constants 3 ms to 10 s, switchable in 1-3-10 steps, slope switchable 6 dB or 12 dB/octave
Output X = in phase, ±10 V full scale, short-circuit protected
Control Interface 16 Opto coupler protected digital inputs, TTL/CMOS compatible 8 bit phase, 4 bit time constant, 4 bit sensitivity
Power Requirements ±15 V, 100 mA typ.
Case 170 x 60 x 30 mm (L x W x H), weight 370 g
Datasheet

Power supply via 3-pin Lemo® socket. A mating connector is provided with the device. Optional power supply PS-15 available. For further information please view the datasheet.

Compact module

In modern optoelectronic systems lock-in-amplification is one of the most useful techniques to get rid of unwanted noise and to improve the measurement sensitivity. Therefore we have created a miniaturised, powerful module operating reliably even in heavy noise environments.

Two ways of programming

The amplifier settings - e.g. phase, gain, time constant - are controlled either by switches directly on the amplifier module or externally using a standard digital I/O computer board. The variable working frequency is determined by an external reference signal which may be e.g. the synchronisation signal of a chopper wheel or the modulation signal of a laser. The current input is well suited for amplifying signals from high impedance sources like photodiodes or PMTs while the voltage input can be used to measure signals from low impedance sources like pyros or coils.

LIA-MV-150 working principle

Block Diagram LIA-MV-150

Applications

  • Spectroscopy
  • Laser stabilisation
  • Luminescence, fluorescence, phosphorescence measurements
  • Light scattering measurements
  • Opto-electronical quality control
  • Integration in industrial and scientific measurement systems
  • OEM systems

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