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x-InGaAs line sensor

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LASER COMPONENTS presents the IG22X0103L28-256TEC, an x-InGaAs line sensor for SWIR spectroscopy.

This array has 256 pixels @ 30µm x 250µm each with a pitch of 50µm, with a typical 20% cut off wavelength at 2.2µm @ -40 degrees C.

Why you should test it?

1. Automatic zeroing for dark current reduction.  As dark current is a function of the bias voltage voltage-free operation is ideal; realistically, the input offset of the amplifier often acts as bias voltage. In the IG22 array, this undesired voltage is reset to zero after each readout.

2. Amplification.  The amplification can be finely adjusted at eight levels, individually per pixel. This is practical because the middle of the line is often illuminated more strongly than its edges. Thus, the optimal dynamic range per pixel can be utilised.

3. This array is designed with a high linearity.  We aim for 99.9% linearity.

4. Optimised thermal design.  This array, which is equipped with a two-stage Peltier element, achieves a dT of 65K, and can be cooled from room temperature to -40°C.

5. Integrated low-pass filter.  An anti-alias low-pass filter is integrated before the sample-and-hold circuit.

Furthermore, this array is equipped with all commercial standard features, such as correlated double sampling (CDS). Complete evaluation electronics are available with a USB interface.