General Description
AMI Semiconductor’s AMIS-721250 (PI6050D) contact image sensor (CIS) is a selectable 600 or 1200 dot per inch (dpi) resolution linear image sensor, which employs AMI Semiconductor’s proprietary CMOS image sensing technology. The sensor contains an on-chip output amplifier, power-down circuitry and parallel transfer features that are uniquely combined with the present-day active-pixel-sensor technology. The image sensors are designed to be cascaded end-to-end on a printed circuit board (PCB) and packaged in an image sensing module. Applications for the sensor array includes facsimiles, PC scanners, check readers, and office automation equipment.
Figure 1 is a block diagram of the sensor. Each sensor consists of 688 active pixels, their associated multiplexing switches, buffers, and an output amplifier circuit with a power down feature. The sensors pixel-pixel spacing is approximately 21.15μm. The size of each sensor without the scribe lines is 14560μm by 425μm.

Key Features
*600 or 1200dpi selectable resolutions
*344 or 688 image sensor elements (pixels)
*21.15μm (1200dpi) pixel center-to-center spacing (47.24dots/mm)
*On-chip amplifier
*Single 5.0V power supply
*3.3V input clocks
*3.0MHz maximum pixel rate
*Parallel / integrate and transfer
*Power-down circuit
*High sensitivity
*Low power
*Low noise

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