iC-LFL1402
256x1 LINEAR IMAGE SENSOR
...
y
inar
relim
p
Rev A3, Page 7/8
3
4
255
256
257
258
259
254
CLK
255
256
1
2
SI
V(AO)
Pix254
Pix255
Pix256
Pix1
Pix2
Pix3
...
Pix255
Pix256
Pix1
SNH
SNH256
NRCI
Integration Time
Figure 6: Clock pulse continued without giving a new integration start signal
Operation with the shutter function
Integration can be stopped at any time via pin DIS,
i.e. the photodiodes are disconnected from their cor-
responding integration capacitor when DIS is high and
1
CLK
2
3
4
5
the current integration capacitor voltages are main-
tained. If this pin is open or switched to GND the pixel
photocurrents are summed up by the integration ca-
pacitors until the next successive SI signal follows.
6
...
255
256
1
SI
SNH
NRCI
DIS
PIX SAMPLE−C
Integration
Disabled
Integration
Enabled
Integration
Disabled
Figure 7: Defining the integration time via shutter input DIS
External bias current setting
In order to reduce the power consumption of the device
an external reference current can be supplied to pin
RSET which reduces the maximum readout frequency,
however. To this end a resistor must be connected
from VCC to RSET. If this pin is not used, it should
be connected to GND.
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