Electronic Components Datasheet Search |
|
S3922 Datasheet(PDF) 6 Page - Hamamatsu Corporation |
|
S3922 Datasheet(HTML) 6 Page - Hamamatsu Corporation |
6 / 7 page NMOS linear image sensor S3922/S3923 series Vscg Vss Vsub NC EOS EOS 10 k Ω +5 V +5 V + – OPEN Dummy video Active video Reset +2.5 V Reset V (Vscd) + + +15 V Rs 10 k Ω Rf Vdd st 2 1 st 2 1 Reset Reset st 2 1 ■ Anti-blooming function If the incident light intensity is higher than the saturation charge level, even partially, a signal charge in excess of the saturation charge cannot accumulate in the photodiode. This excessive charge flows out into the video line degrading the signal purity. To avoid this problem and maintain the signal purity, applying the same voltage as the Reset V voltage to the saturation control drain and grounding the saturation control gate are effective. If the incident light intensity is extremely high, a positive bias should be applied to the saturation control gate. The larger the voltage applied to the saturation control gate, the higher the function for suppressing the excessive saturation charge will be. However, this voltage also lowers the amount of saturation charge, so an optimum bias voltage should be selected. ■ Auxiliary functions 1) All reset In normal operation, the accumulated charge in each photodiode is reset when the signal is read out. Besides this method that uses the readout line, S3922/S3923 series can reset the photodiode charge by applying a pulse to the saturation control gate. The amplitude of this pulse should be equal to the φ1, φ2, φst, Reset φ pulses and the pulse width should be longer than 5 μs. When the saturation control gate is set at the “High” level, all photodiodes are reset to the saturation control drain potential (equal to video bias). Conversely, when the saturation control gate is set at the “Low” level (0 V), the signal charge accumulates in each photodiode without being reset. 2) Dummy video S3922/S3923 series have a dummy video line. Positive-polarity video signals with the DC offset remove can be obtained by differential amplification of the active video line and dummy video line outputs. When not needed, leave this unconnected. ■ Precautions for using NMOS linear image sensors 1) Electrostatic countermeasures NMOS linear image sensors are designed to resist static electrical charges. However, take sufficient cautions and countermea- sures to prevent damage from static charges when handling the sensors. 2) Window If dust or grime sticks to the surface of the light input window, it appears as a black blemish or smear on the image. Before using the image sensor, the window surface should be cleaned. Wipe off the window surface with a soft cloth, cleaning paper or cotton swab slightly moistened with organic solvent such as alcohol, and then lightly blow away with compressed air. Do not rub the window with dry cloth or cotton swab as this may generate static electricity. KMPDC0027EA KMPDC0028EA ■ Readout circuit example 6 ■ Timing chart |
Similar Part No. - S3922_15 |
|
Similar Description - S3922_15 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |