DCS500PA digital lock-in amplifier
WaveQuanta

DCS500PA Digital Lock-in Amplifier, 50 mHz–120 kHz, 1 nV–1 V Sensitivity

DCS500PA
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RoHS REACH

Digital lock-in amplifier for recovering weak modulated detector signals from 50 mHz to 120 kHz.

The DCS500PA is a digital lock-in amplifier covering 50 mHz to 120 kHz, with low-noise voltage and current inputs and full-scale sensitivity from 1 nV to 1 V. It offers more than 100 dB dynamic reserve and CMRR, time constants from 10 µs, harmonic detection and a built-in sine reference oscillator. All functions can be controlled and read out over RS-232 or USB.

Key Features

  • Frequency range 50 mHz–120 kHz
  • Low-noise voltage (single-ended or differential) and current inputs
  • Full-scale sensitivity from 1 nV to 1 V in a 1-2-5 sequence
  • Dynamic reserve and CMRR above 100 dB
  • Time constants from 10 µs to 30 s (to 3 ks below 200 Hz), 6/12/18/24 dB/oct roll-off
  • Harmonic detection 2F, 3F … nF up to 120 kHz
  • 3.5-inch TFT display of X, Y, R and θ; RS-232 and USB control

Typical Applications

  • Detection of chopped optical signals from photodetectors
  • Weak-signal spectroscopy with monochromators
  • Infrared detector readout with PbS, InSb and MCT detectors
  • Harmonic and phase-sensitive measurements

Related Products

  • DCS540 — Optical Chopper System

Browse all: Lock-In Amplifiers

Model: DCS500PA · Contact WaveQuanta for a quote, configuration advice and lead time.

Frequency Range 50 mHz–120 kHz
Voltage Input Single-ended or differential; 10 MΩ // 25 pF, AC or DC coupled
Current Input 10⁶ or 10⁸ V/A; 1 kΩ to virtual ground
Full-Scale Sensitivity 1 nV–1 V in a 1-2-5 sequence
CMRR Above 100 dB to 10 kHz, decreasing by 6 dB/oct
Dynamic Reserve Above 100 dB
Gain Accuracy 0.2% typ., 1% max.
Input Noise 10 nV/√Hz at 1 kHz; 0.13 pA/√Hz at 1 kHz; 0.013 pA/√Hz at 100 Hz
Line Filters 50/60 Hz and 100/120 Hz
Grounding BNC shield grounded or floated via 1 kΩ to ground
Reference Input TTL or sine, 50 mHz–120 kHz, 1 MΩ // 25 pF
Phase Resolution 0.01°; absolute below 1°, relative below 0.01°
Phase Noise Internal ref. below 0.0001° rms at 1 kHz; external ref. 0.005° rms at 1 kHz
Phase Drift Below 0.1°/°C under 10 kHz; below 0.5°/°C over 10 kHz
Harmonic Detection 2F, 3F … nF to 120 kHz (n below 32,767)
Acquisition Time Internal ref. instantaneous; external ref. (2 cycles + 5 ms) or 40 ms, whichever is larger
Time Constants 10 µs–3 ks (below 200 Hz), 10 µs–30 s (above 200 Hz); 6/12/18/24 dB/oct
Synchronous Filters Available below 20 Hz
Harmonic Rejection -90 dB
Stability Digital outputs and display: no zero drift; analog outputs: below 5 ppm/°C
Internal Oscillator 50 mHz–120 kHz, accuracy 25 ppm + 30 µHz, resolution 1 mHz
Oscillator Distortion -80 dBc (below 10 kHz), -70 dBc (above 10 kHz)
Oscillator Output Sine, 0.10–1 Vrms, 1% accuracy, 50 ppm/°C stability, 50 Ω
Display 3.5-inch 320 × 240 TFT; X, Y, R, θ; large numeric readout
CH1 and CH2 Outputs X, Y, R or θ; ±5 V; 100 Ω
Interfaces RS-232 and RS-232-to-USB; all functions controllable via USB
Power 220/240 V AC, 50/60 Hz, 30 W
Dimensions (W × D × H) 259 × 320 × 115 mm with feet (102 mm high without feet)
Weight 3.2 kg
Specification Sheet PDF — Download
No CAD drawings available for this product.
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Product Family: Lock-In amplifier (3 variants)

Product ▴▾ SKU Size ▴▾ Clear Aperture ▴▾ Operating Wavelength ▴▾
DCS540 Optical Chopper System, 20 Hz–5 kHz, 0.01 Hz Resolution DCS540 — — —Contact
DCS500PA Digital Lock-in Amplifier, 50 mHz–120 kHz, 1 nV–1 V Sensitivity Current DCS500PA — — —
Digital Lock-in Amplifier Melab Melab — — —View