1. DESCRIPTION
This data sheet covers the PI630MC-A6C specification. The PI630MC-A6C is a color contact
image sensor module. The module contains 7 image-sensor chips, PI3045B, a product of PIC.
These chips are sequentially cascaded to provide a line array of photo-detectors. Each photo-
detector in the image sensor posses its own independent processing circuit. As the photo-
sensors’ digital shift register scans the image sensor chip, it sequentially produces the video
signals at the output of image array. The PI630MC-A6C’s schematic and its mechanical outline
drawing are located on page 9 and 10 respectively.
2. OVERVIEW
The PI630MC-A6C has 102 mm read width. Its minimum line rate is 520
ms/line
with a maximum
CP, clocking speed, equal to 2.5 MHz (PRATE, pixel rate 5 MHz). Consistent with its typical
operational frequencies, CP = 2.0 MHz and PRATE = 4.0MHz, the data are given with integration
time of 640
ms/line.
Its sensor photo-site density is 23.64 elements/mm. The module has one
analog video output; two clock inputs, CP and SP (the start pulse); one reference voltage input
for the amplifier output bias level control; one power supply input; and four LED inputs.
2.1 Special Feature: Flush Mode
A special added feature is the Flush Mode that functions as an electronic shutter. It
is not a true electronic shutter in its classical sense. Instead of an instantaneous
reset time, it resets duration is one sensor chip’s line scan time, rather than taking
whole line scan time that includes all seven sensor chips. Its operational description
is included in under the discussion of the schematic, section 10.0 Schematic
Diagram, page 9.
3. SCAN OUTLINE
TABLE 3.1 SCAN OUTLINE
ITEM
READABLE WIDTH
SENSOR PHOTO-SITE DENSITY
NUMBER OF ACTIVE SENSOR
PHOTO-SITES
LINE READ TIME
(1)
CLOCK FREQUENCY
(1)
PIXEL RATE
(1)
SPECIFICATION
102 mm
23.64 elements/mm
2408 elements
~520 µs/line
2.5 MHz
5.0 MHz
NOTE
Tested @ 5.0 MHz Pixel
Rate (PRATE)
MAX RATE
MAX RATE
Note (1) unless otherwise noted, although the module is tested at 5.0MHz, all of the data
were tested and specified with a typical clock frequency of 4.0MHz. Since the light
power is fixed, if the line-scan rate is set proportional to the clock rate, then the
integration time reduces as clock frequency is increased, hence its exposure. The
reduction in the exposure proportionately reduces the video output. Accordingly, the
signal-to-noise ratio reduces as the frequency increased.
PAGE 2 OF 10 - PI630MC-A6C, 11/19/03
AMI [ AMI SEMICONDUCTOR ]
