- 50 mHz to 120 kHz frequency range
- Low-noise current and voltage inputs
- 1 nV to 1 V full-scale sensitivity
- Time constants from 10 µs to 3 ks
- Up to 100 dB dynamic reserve
- Up to 100 dB CMRR
- 3.5 inch color TFT-LCD screen, Small size (259*320*102 mm)
- Support remote control, embedded a free LabVIEW program
Maxwellon TW4801 Small-size Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 50 mHz to 120 kHz. With the high-speed 4-core architecture, high-precision ADC and excellent analog performance, TW4801 can easily detect the phase and the magnitude of weak signals overwhelmed by various large noise. The performance of TW4801 is as good as other lock-in amplifiers brands, even better in some certain parameters, such as measurement accuracy, operating bandwidth, which meets the needs of scientific research and industrial application well.
Specifications
Signal Channel | |
Voltage Input Mode | Single-ended or Differential |
Full-scale Sensitivity | 1 nV to 1 V in a 1-2-5 sequence 1 fA to 1 µA |
Current Input | 106 or 108 V/A |
Impedance | • Voltage: 10 MΩ // 25 pF, AC or DC coupled • Current: 1 kΩ to virtual ground |
C.M.R.R | > 100 dB to 10 kHz, decreasing by 6 dB/oct |
Dynamic Reserve | > 100 dB |
Gain Accuracy | 0.2% typ, 1% max |
Voltage Noise | 9 nV/√Hz at 997 Hz |
Current Noise | • 0.13 pA/√Hz at 97 Hz • 0.14 pA/√Hz at 997 Hz |
Line Filters | 50/60 Hz and 100/120 Hz |
Gounding | BNC shield can be grounded or floated via 10 kΩ to ground |
Reference Channel | |
Input | • Frequency range: 50 mHz to 120 kHz • Reference input: TTL or Sine • Input impedance: 1 MΩ//25 pF |
Phase | • Resolution: 0.01° • Absolute phase error: < 1° • Relative phase error: < 0.01° • Phase noise: (Internal ref.) Synthesized, <0.0001°rms at 1 kHz; (External ref.) 0.005°rms at 1 kHz (100 ms time constant, 12 dB/oct) • Drift: <0.01°/℃ below 10 kHz, <0.5°/℃ above 10 kHz |
Harmonic Detection | 2F, 3F, …nF to 120 kHz (n<32767) |
Acquisition Time | • Internal ref.: instantaneous acquisition • External ref.: (2 cycles + 5 ms) or 40 ms, whichever is larger |
Demodulator | |
Stability | • Digital output: no zero drift on all setting • Display: no zero drift on all setting • Analog output: <5 ppm/℃ for all dynamic reserve settings |
Harmonic Rejection | -90 dB |
Time Constant | • 10 µs to 3 ks (<200 Hz) • 10 µs to 30 s (>200 Hz) (6, 12, 18, 24 dB/oct rolloff) |
Synchronous Filters | Available below 20 Hz |
Internal Oscillator | |
Frequency | • Range: 50 mHz to 120 kHz • Accuracy: 2 ppm + 10 µHz • Resolution: 1 mHz |
Distortion | • -80 dBc (f < 10 kHz) • -70 dBc (f > 10 kHz) |
Amplitude | 0.10 to 1 Vrms |
Accuracy | 1% |
Stability | 50 ppm/℃ |
Output | Sine output on rear panel, and TTL sync output on rear panel |
General Specification | |
Interface | RS-232 and RS-232 to USB interface |
CH1 and CH2 Outputs | • Function: output X, Y, R, θ • Output voltage: ±5 V full scale, 30 mA max output current |
Screen | 3.5 inch, 320×240 TFT |
Display Quantities | 4 channels of data to display X,Y,R,θ |
Display Types | Numerical form |
Power Requirement | • Voltage: 220 – 240 VAC, 100 – 120 VAC (optional) • Frequency: 50/60 Hz • Power: 20 W |
Dimension | • 259 (W) × 115 (H) × 320 (D) mm (with feet) • 259 (W) × 102 (H) × 320 (D) mm (without feet) |
Weight | 3.2 kg |
Ordering Information
Part No. | Name | Description |
TW4801 | Digital Lock-in Amplifier | 50 mHz to 120 kHz, 1 nV to 1 V full-scale sensitivity |
