NMOS linear image sensor
NMOS linear image sensors are self-scanning photodiode arrays designed specifically as detectors for multichannel spectroscopy. The scanning circuit is made up of N-channel MOS transistors, operates at low power consumption and is easy to handle. Each photodiode has a large active area, high UV sensitivity yet very low noise, delivering a high S/N even at low light levels. NMOS linear image sensors also offer excellent output linearity and wide dynamic range. S3921-256Q has a current-integration readout circuit utilizing the video line and an impedance conversion circuit. The output is available in boxcar waveform allowing signal readout with a simple external circuit. The photodiode of S3921-256Q has a height of 2.5 mm and is arrayed in a row at a spacing of 50 μm. Quartz glass is the standard window material.
|Type||Voltage output type|
|Image size||12.8 x 2.5 mm|
|Number of effective pixels||256 x 1 pixels|
|Pixel size||50 x 2500 μm|
|Spectral response range||200 to 1000 nm|
|Line rate (max.)||1950 lines/s|
|Measurement condition||Typ. Ta=25 ℃, unless otherwise noted
Saturation charge: Reset V=2.5 V, Vdd=5.0 V, Vφ=5.0 V
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