256x1 Linear Image Sensor 140

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iC-LFL1402 is an integrating light-to-voltage converter with a single line of 256 pixels pitched at 63.5μm (center-to-center distance). Due to the
monolithical integration there is no pixel-gap or pitch distortion whatsoever. Each pixel consists of a 56.4μm x 200μm photodiode, an integration capacitor and 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 enables the integration period to be prematurely terminated at any time (electronic

When the start signal is given the hold mode is activated for all pixels simultaneously with the next rising clock edge; starting with pixel 1 the hold voltages are switched in sequence to the push-pull output amplifier. The second clock pulse deletes all integration capacitors and the integration period starts again in the background during the output phase. A run is complete after 256 clock pulses.

iC-LFL1402 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.


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256 active photo pixels of 56μm at a gap and distortion free pitch of 63.5μm (400 DPI)
Integrating L-V conversion followed by a sample & hold circuit
High sensitivity and uniformity over wavelength
High clockrates of up to 5MHz
Only 256 clocks required for readout
Shutter function enables flexible integration times
Glitch-free analogue output
Push-pull output amplifier
5 V single supply operation
Can run off external bias to reduce power consumption
Function equivalent to TSL1402 (serial mode)


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256x1 Linear Image Sensor 140
256x1 Linear Image Sensor 140