Preliminary PI3042A datasheet

PI3042A

400DPI CIS Sensor Chip

Engineering Data Sheet

Description:

Peripheral Imaging Corporation PI3042A CIS, Contact Image Sensor is a 400 dot per inch

(dpi) resolution, linear array image sensor chip. The sensor chip is processed using PIC’s

proprietary CMOS Image Sensor Technology. Designed for cascading multiple chips in a

series, the image sensor chips, using chip-on-board process, are bonded end-to-end on a

printed circuit board (PCB). This bonding process allows users to produce variable CIS

module lengths in increments of chip array lengths. Hence, the wide variety of image reading

widths can easily be applied to the numerous document scanners, found in facsimile, as well

as, the narrow width scanners, such as, those found in check readers, lotto tickets, entrance

gate tickets and other office automation equipment which requires a wide variety of scanning

widths.

Figure 1 is a block diagram of the imaging sensor chip. Each sensor chip consists of 128 detector

elements, their associated multiplexing switches, buffers, and a chip selector. The detectors

element-to-element spacing is approximately 62.5 µm. The size of each chip without scribe lines is

8080 µm by 385 µm. Each sensor chip has 7 bonding pads. The pad symbols and functions are

described in Table 1.

Figure 1. PI3042A Block Diagram

SYMBOL

FUNCTION

SP

Start Pulse: Input clock to start the line scan.

CP

Clock Pulse: Input clock to clock of the Shift Register.

VDD

Positive Supply: +5 volt supply connected to substrate.

DGND

Digital Ground: Connection topside common

IOUT

Signal Current Output: Output for video signal current

AGND

Analog Ground: Connection topside common

EOS

End of Scan Pulse: Output from the shift register at end of scan.

8080µm

385µm

Buffer

SP

CP

VDD DGND

IOUT

AGND EOS

Chip

Select

Buffer

Readout Shift Register

Buffer

Row of 128 Sensors

and Video Signal

Multiplexers

Table 1. Pad Symbols and Functions

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