iC-LF1401
128x1 Linear Image Sensor
Rev A3, Page 2/9
DESCRIPTION
iC-LF1401 is an integrating light-to-voltage converter
with a line of 128 pixels pitched at 63.5
µm (center-to-
center distance). Each pixel consists of a 56.4
µmx
200
µm photodiode and an integration capacitor with
a sample-and-hold circuit.
The integrated control logic makes operation very
simple, with only a start and clock signal necessary.
A third control input (DIS) enables the integration to
be suspended at any time (electronic shutter).
When the start signal is given hold mode is acti-
vated for all pixels simultaneously with the next lead-
ing clock edge; starting with pixel1 the hold voltages
are switched in sequence to the push-pull output am-
pli
er. The second clock pulse resets all integration
capacitors and the integration period starts again in
the background during the output phase. A run is
complete after 128 clock pulses.
iC-LF1401 is suitable for high clock rates of up to
5 MHz. If this is not required the supply current can
be reduced via the external bias setting (current into
pin RSET).
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