4EM-5 with a Photovoltaic Four-Element Linear Detector

VIGO System’s 4EM-5 with a Photovoltaic Four-Element Linear Detector is a multipurpose IR multi-channel detection module. The thermoelectrically cooled photovoltaic four-element linear detector has been developed based on HgCdTe heterostructure. It is combined with a DC-coupled four-channel preamplifier, transimpedance, a fan and a thermoelectric cooler controller in a compact housing.


  • Crosstalk is low
  • Includes four channels
  • Compatible with optical accessories
  • Works on a single power supply

Spectral response (Ta = 20 °C)

Spectral response (Ta = 20 °C). Image Credit: VIGO System

Specification (Ta = 20 °C)

Source: VIGO System

Parameter Typical value
Optical parameters
Cut-on wavelength λcut-on (10%) µm 3.5±0.5
Peak wavelength λpeak, µm 4.5±0.5
Optimum wavelength λopt, µm 5.0
Cut-off wavelength λcut-off (10%) µm 6.0±0.5
Detectivity D*(λpeak), cm⋅Hz1/2/W ≥1.4×109
Detectivity D*(λopt), cm⋅Hz1/2/W ≥1.2×109
Output noise density vn(100 kHz), nV/Hz1/2 ≤500
Electrical parameters
Voltage responsivity Rvpeak, R = 1 MΩ*)), V/W ≥1.7×105
Voltage responsivity Riopt, R = 1 MΩ*)), V/W ≥1.6×105
Low cut-off frequency flo, Hz DC
High cut-off frequency fhi, Hz ≥1M
Output impedance Rout, Ω 50
Output voltage swing Vout(R = 1 MΩ*)), V 0 – 4
Output voltage offset Voff, V max ±20
Power supply voltage Vsup, V +7.5
Power consumption, W max 6
Other information
Active elements material epitaxial HgCdTe heterostructure
Active areas A, mm×mm 4×(0.2×0.2)
Distance between active elements, mm 0.05
Window pSiAR
Acceptance angle, Φ ~70°
Ambient operating temperature Ta, °C 10 to 30
Signal output sockets 4×MCX
Power supply socket DC 2.1/5.5
Mounting hole M4
Fan yes

*) RL – load resistance

Mechanical Layout, mm

Mechanical layout, mm

Image Credit: VIGO System

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