Overview: IMAGE SENSOR NMOS linear image sensor
S3921/S3924 series
Voltage output type with current-integration readout circuit and impedance conversion circuit 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/S3924 series have 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 photodiodes of S3921 series have a height of 2.5 mm and are arrayed in a row at a spacing of 50 µm. The photodiodes of S3924 series also have a height of 2.5 mm but are arrayed at a spacing of 25 µm. The photodiodes are available in 3 different pixel quantities for each series, 128 (S3921-128Q), 256 (S3921-256Q, S3924-256Q) and 512 (S3921-512Q, S3924-512Q) and 1024 (S3924-1024Q). Quartz glass is the standard window material.
