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Balanced / auto-balanced IR detection moduleNIPM-I-5

2.9 – 5.5 µm and over 1.8 MHz, with two HgCdTe thermoelectrically cooled, optically immersed photovoltaic detectors

NIPM-I-5 is an infrared detection module designed for differential optical signal detection. The device can operate in balanced and auto-balanced mode. This detection module uses two individual detectors based on HgCdTe heterostructure. These IR detectors (signal and reference) are precisely matched to achieve a very high Common Mode Rejection Ratio (CMRR). NIPM-I-5 is dedicated to operating in systems where excess noise of radiation dominates, e.g. in the laser and some FTIR spectrometers.


Two channels with similar spectral characteristics and frequencies

Manual change of balanced or auto-balanced mode

Low noise operation and high detectivity

Integrated with fans and thermoelectric cooler controllers

Single power supply

Compatible with optical accessories

Detectors type: PVI-4TE-5-1×1-TO8-wAl2O3-36


QCL lasers excess noise suppression in gas analysis

Specification (Ta = 20°C, Vb = 0 V)

Typical value
Optical parameters
Cut-on wavelength λcut-on (10%) µm
Peak wavelength λpeak, µm
Optimal wavelength λopt, µm
Cut-off wavelength λcut-off (10%) µm
Detectivity D* (λopt, REF), cm⋅Hz1/2/W
Detectivity D* (λopt, SIG), cm⋅Hz1/2/W
Output noise density vn (100 kHz, RLoad = 50 Ω, REF), nV/Hz1/2
Output noise density vn (100 kHz, RLoad = 50 Ω, SIG), nV/Hz1/2
Electrical parameters
Voltage responsivity Rvopt, REF), V/W
Voltage responsivity Rvopt, SIG), V/W
Low cut-off frequency flo, Hz
High cut-off frequency fhi, MHz ≥1.8
Output impedance Rout (REF, SIG, BAL/A-BAL), Ω 50
Output voltage swing Vout (RLoad = 50 Ω), V 0.4
Output voltage offset Voff, mVDC
CMRR balance / reference (100 kHz), dB
CMRR auto-balance / reference (100 kHz), dB
Power supply voltage Vsup, VDC
Power supply current Isup, A
Other information
Active element material (REF and SIG)
epitaxial HgCdTe heterostructure
Optical area AO (REF and SIG), mm×mm
Window (REF and SIG)
Acceptance angle Φ (REF and SIG)
Ambient operating temperature Ta, °C
5 to 25
Reference output socket (REF)
Signal output socket (SIG)
Balanced / auto-balanced output socket 
Power supply  socket
DC 2.1/5.5
Mounting hole
yes (2 pcs)

Spectral response (Ta = 20°C, Vb = 0 V)

Mechanical layout, mm


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Temperature sensor characteristics

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