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High resolution Xlin-1.7-3000 InGaAs detector

The high resolution Xlin-1.7-3000 InGaAs detector is specifically designed for earth observation. The detector is based on mechanical butting of three InGaAs photodiode arrays with each 1024 pixels on a 25 μm pixel pitch, forming a nearly continuous line of 2900 pixels. The sensors come in an hermetically sealed package with an anti-reflective coated window or in an open package (optional).

Thanks to their high sensitivity and quantum efficiency they operate at very low illumination levels.

The read-out integrated circuit includes Correlated Double Sampling (CDS) and autozero features, enabling low Dark Signal Non Uniformity (DSNU).

A selectable integration time and capacitor allow for fine tuning the conversion gain in flight. You can choose from High Sensitivity (HS) mode and High Dynamic Range (HDR) mode. Furthermore the high maximum line rate of 10 kHz enables a high resolution in the time domain.

Xenics XLIN-1.7-3000 Technical Specifications
Camera ModelXLIN-1.7-3000
Array typeInGaAs photodiode array
Spectral band0.9 to 1.7 µm
# pixels3 x 1024 pixels mechanically butted
Pixel pitch25 µm
Pixel height25 µm
InGaAs array length73.2 mm
Pixel operability> 99%
Pixel alignmentX-Y direction: < 25 µm (over the full array), Z direction: <100µm (over the full array)
Subarray separation (along track)< 1.5 mm
Fill factor100%
Peak detectivity (at 293K)3.8 x 10x12 cm.sqrt (Hz)/W
Peak Quantum Efficiency (QE)75%
Integration time range1 µs up to 1 second
Cooling Uncooled
Dark signal non-uniformity (DSNU)< 5%
Modulation transfer function at Nyquist (MTF)> 50%
PackageCustom made metal can with ceramic substrate and 2x36 pins
Window and lidDouble-sided coated transmission filter with gold plated lid to allow for seam sealing
TechnologyCTIA topology 0.35 µm CMOS
Power supply voltage3.3 V
Correlated Double Sampling (CDS)Yes
Auto ZeroYes
# Outputs3 outputs
Pixel rate (max)12.5 MHz
Line time (min)100 µs
Operating modes Integrate Then Read (ITR), Integrate While Read (IWR)
Power consumption (slow scan mode)< 300 mW per module or <900 mW for the full array
Gain settingsSelectable from 5fF (HS) till 830 fF (HDR)
Gain (µV/e-)From 32 (HS) to 0.19 (HDR)
Pixel well depth (e-)From 60Ke- (HS) to 10Me- (HDR)
Dynamic rangeFrom 60:1 (HS) to 3200:1 (HDR)
Operational temperature range -40°C to 85°C
Radiation toleranceQualified for 10 krad ionizing radiation with maintained performance