Digital Lock-in Amplifier | Melab

Melab is a high-performance and multi-functional digital lock-in amplifier. With rich analog I/O interfaces and multiple functions such as visual lock-in amplifier, virtual oscilloscope, parameter scanner, signal generator, data acquisition, AM/FM modulation, PID controller, etc.

Meanwhile, Melab supports an easy mode for a quick start, which simplifies the workflow of scientific research, reduces the need for researchers to combine multiple devices, and improves the efficiency and quality of scientific research.

DC to 1 MHz/5 MHz (optional)

One current input and one differential voltage input

4+4+4 application mode (4 demodulators + 4 external references + 4 PIDs) (optional)

Sampling rate: 100 MSa/s, 16 bit ADC

Full-scale sensitivity: 1n V～3 V

Noise density: < 2.5 nV/ Hz

Dynamic reserve: > 120 dB

Supports Sine and TTL reference signal input and output

Support 1/1023~1023 harmonics detection

> Functional Options

♦ 5M demodulation frequency

♦ 4 demodulators

♦ 4 PID controllers

♦ External wireless operating panel

♦ AM/FM modulation

♦ Stage Ctrl (platform control)

Optical measurements, spectroscopy

Impedance measurement

Magnetic measurement

Biomedical

Semiconductor materials and devices

Signal Input (Voltage and Current)

Voltage Channel	1 (single-ended and differential)
Current Channel	1
Frequency Range	DC ~ 1 MHz/5 MHz (optional)
Voltage Input Range	±1 mV, ±3 mV, ±10 mV, ±30 mV, ±100 mV, ±300 mV, ±1 V, ±3 V
Voltage Input Noise	2.5 nV/√HZ@1 kHz
Full-scale Input Sensitivity (Voltage Input)	1nV - 3V
Current Input Range	±1 nA, ±10 nA, ±100 nA, ±1 µA, ±10 µA, ±100 µA, ±1 mA, ±10 mA
Current Input Noise	14 fA /√HZ@100 Hz
Full-scale Input Sensitivity (Current Input)	10 fA ~ 10 mA
Dynamic Reserve	≥120 dB

Reference Output

Number of Channels	1
Frequency Range	DC ~ 1 MHz/5 MHz (optional)
Output Voltage Range	±10 mV, ±100 mV, ±1 V, ±10 V
Signal Type	Sine/TTL
Output Phase Range	±180°
Maximum Output Current	100 mA

Demodulator and Reference

Number of Demodulators	1 dual-phase/4 dual-phase (optional)
Reference Mode	Internal reference; External reference
Harmonic Detection	Supports (n/m)* Fth harmonic measurement, (n/m)* F<1 MHz/5 MHz (optional); n range (harmonics): 1~1023; m range (harmonics): 1~1023
Time Constant	126 ns~30 ks
Filter Slope (dB/oct)	6, 12, 18, 24, 30, 36, 42, 48
Other Filter Functions	Sinc filter
Phase Resolution	10 udeg
Frequency Resolution	355 nHz

Reference Input (can be set to 2 auxiliary inputs)

Number of Channels	2
Frequency Range	DC ~ 1 MHz/5 MHz (optional)
Signal Type	Sine/TTL
Voltage Input Range	±10 V

Auxiliary Input

Number of Channels	2
Voltage Input Range	±10 V

Auxiliary Output

Number of Channels	4
Output Voltage Range	±10 V
Maximum Output Current	20mA

Communications

Communications Interface

USB2.0 (device) + USB3.0 (host)

LAN/1 Gbps

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