S10121_15 Datasheet, PDF (8/13 Pages) Hamamatsu Corporation – CMOS linear image sensors

CMOS linear image sensors
S10121 to S10124 series
Variable integration time function
By controlling the clock pulse to the INT terminal, the integration time for each pixel can be changed to any length that is an integer
multiple of one readout period. When the clock pulse at the INT terminal is set to “high” at the pixel signal readout timing, then no sig-
nal is output from that pixel (see below). This allows the signal charge to continuously accumulate in that pixel as long as no signal is
output. For example, when the integration time of one readout period is 100 ms and this function is used to output a signal from a pixel
once every 3 readout periods, then the integration time of that pixel will be 300 ms. Using this function to lengthen the integration time
of certain pixels makes it possible to effectively detect spectral signals of weak wavelength components.
Timing chart
(Concept view showing the settings to double, triple and quadruple the integration times at channels 2, 3 and 4, respectively, by
using the variable integration time function on the basis of the integration time at channel 1.)
CLK
ST
Readout
timing
INT
1234
1234
1234
1234
1234
1 ch integration time
2 ch integration time
3 ch integration time
4 ch integration time
Output
Invalid data
Valid data
KMPDC0233EC
8