AMIS-721250: Contact Image Sensor
Data Sheet
1.0 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.
2.0 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
14560µm
21.15µm
342
686
343
687
344
688
1
1
2
2
3
4
Row of 688 Pixels (1200dpi)
or Selectable
3
4
Row of 344 Pixels (600dpi)
and Video Line Multiplexer
425µm
Parallel Transfer, Storage Cells and Readout Registers
Amplifier, Power-
Down and Offset
Control
SI
GBST
CLK
SIC
SC
VDD
VOUT
VSS
VREF
SO
Figure 1: Sensor Block Diagram
AMI Semiconductor – Dec. 05, M-20496-004
1
www.amis.com