AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
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1.0 General Description
The AMIS-710216 (PI216MC-DR) is a contact image sensor (CIS) module with an additional on board circuit that digitizes the analog
pixels from the CIS image sensor to a “background-tracking”, two-level digital output signal. It is based on CIS module, the AMIS-
710209-A6 (PI209M-A6) manufactured by AMIS, but with a shorter read length of 88mm. Hence, its performance is equivalent to th e
AMIS-710209-A6 which uses MOS image sensor tec hnology to gain its high-speed perfor mance and high sensitivity. The AMIS-710216
is suitable for scanning documents with width of 88mm and with reso lution of 8 dots per millimeter (dpm). It has broad applic ations, but
it was especially designed for the follo wing ar eas:
• Where data compression is required, such as in data transm issions
• Where component pin-out count must be kept to a minimum
The background-tracking-digitizing circuits in the AMIS-710216 have been referred to as the “dynamic threshold” two-level A/D
converter. For the purpose of descri bing the modu le’s chara cteristics this “d ynam ic thres hold” proc essin g circuit s ha ll herein be referr ed
to as the “tracking digitizer”.
2.0 Key Features
• Light source, lens and sensor are integrated into a single mo dule
• 8dpm resolution, 88mm scanning length
• Up to 176µsec/line scanning speed, with 4MHz pixel rate (See Table 3, Note 3)
• Wide dynamic range
• Two-level tracking digital output (“Dynamic Threshold Digitizer”)
• 660nm light source (other colors available)
• Compact size ≅ 13mm x 25.6mm x 102mm
• Low power
• Light weight
3.0 Module Description
Figure 1: Block Diagram of AMI S-710216
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AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
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of 11 sensors that are cascaded to provide 704 photo-detectors with their associated multiplex
at controls its sequential r ea dout. Mounted in the module is one-to-one graded-in de xed micr o lens
array that focuses the scan ned documents to image onto its sensing plane. A buffer am plifier amplifies the vi deo pixels from the image
sensors and passes them to analog digitizing circuit, where the video p ixels are converted to digital signal and passed to output of the
module. See Figure 1, the block diagram of the AMIS-710216 module.
Illumination is accomplished by means of an integrated LED light source. All components are housed in a smal l plastic housing with a
cover glass which acts as the focal point for the object b eing scanned and protects the imaging arra y, the micro lens assembl y and the
LED light source from dust. The pictorial of AMIS-710216 cross section is shown in Figure 2.
I/O to the module is an 8-pin flex cable connector (see I/O Connector, under Specifications) located on one end of the module. The
connector is on the top of the module with the glass windo w facing down and it is located on the opp osite side of the module. See the
Mechanical Housing under Mechanica l Structure.
The AMIS-710216 module consists
switches, and a digital shift register th
Figure 2: Inside Pictorial of the Module
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AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
4.0 Circuit Description and Operation
See Figure 3 for a simplified block diagram of the analog tracking digitizer. Fundamentally, the tracking digitizer transforms the signal
output from a CIS module existing o n the market today. It takes the analog signal from the CIS section of AMIS-7102 16 and derives a
tracking background reference signal. Then this reference is compared against the output signals from the CIS section. The resulting
signal from the comparison produces a two-level digital signal that is high when the pixel signal is brighter than the background and
remains at zero as long as the signal is darker than the background signal.
(PI3034) image sensors, accordingly, the image sensors will span one scanning-
ad line width that is 11 sensor times 64 pi xel elements/sensor, or 704 pixel elements.
operation, the module produces the analog image pixel signals that are proportional to exposure on the corresponding picture
ement on the document (the video signal) then passes the signal to the tracking digitizer. In turn, the digitizer processes the analog
age pixels to digital image pixels. The analog image pixels, at test point TV, are separated into two signals. One generates the
ference signal and the other remains unmodified. These unmodified image pixels are applied to one of the input of the comparator.
he reference signal is appli ed to the second input of the comparator. T he results of the comparison are the digital image pixels. T his
gital output is produced in two levels, determined by the difference between the background reference signal and the analog image
xels. A digital pixel output of value “one” represents the analog image p ixel that is brig hter than the background and digita l pixel level
f value “zero” represents the imag e pixel that is darker than background.
Figure 3: Analog Signal Reference Generator and a Single- bit Comparator
Figure 1 depicts the two basic circuits, the CIS (image sensors and video amplifier) and the tracking digitizer. In the CIS section, the
module has 11 serially concatenated AMIS-720234
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AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
5.0 Specifications
The I/O connector pins and their functions is listed in Table 1.
Table 1: Pin Configuration
Pin Number Symbol Names and Functions
1 DIGOUT Digital video output
2 Vdd (+5V) Ground; 0V
3 Vn (-5V) Negative power supply
4 SP Start pulse for the shift register
5 GRD Ground; 0V
6 CLOCK Clock for the shift register
7 GLED Return for the LED light source
8 VLED Power in for the LED light source.
The connector is an 8-pin 1m m surface mount flex input, Molex 52207-0890.
.1 Inputs
IGOUT is on Pin 1 of the I/O connector. This is the digital video output from the CI S module. Reflection off the dark target produces a
gital signal of “0” level, while the white reflection off the white target produ ces a digital level of “one”. T he amplitudes of the white and
ark are listed in the table below:
.0 Electro-Optical Characteristics (25°C)
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There are five inputs:
• Clock is on Pin 6 of the I/O connector. This is main clock input into the CIS module.
SP is on Pin 4. This is the start clock input to the CIS module. •
• VDD is on Pin 2. This is a +5V supply.
• VN is on Pin 3. This is a -5V supply.
• VLED is on Pin 8. This is a +5V supply for the LED light source.
Note: Power return for the LED light source is GLED on Pin 7 and the ground return for the CIS modules is Pin 5.
5.2 Video Output
D
di
d
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Table 2: Electro-Optical Characteristics (25°C)
Parameter Symbol Parameter Units Note
Number of photo detectors 704 Elements
Pixel-to-pixel spacing 125 µm
Line scanning rate Tint(1) 352 µsec @ 2.0MHz clock
frequency
Clock frequency f 2.0 MHz
Bright output Digital video output signal
Dark output >3.5
<0.8 V
V
Note:
1. pecified The tint is s
tim consta with a 2.0MHz ency. In operati reference generator is set to match the initial exposure time, hence the
nt will determine the egration time. e is also a function of the clock frequency. Accordingly, it is highly
recommended that the parameters for the lthough the specification is shown nominally at 2.0MHz, the maximum clock
frequency is 4.0MHz.
clock frequ on, the time constants in the
on time optimum int
be factory adjusted Note that the integrati
specific applications. A
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AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
Table 3: Recommended Operating Condit C)
ions (25°
Item Symbol Min. Mean Max. Units
Vdd 5.0 V
Vn -5.0 V
VLED
P
5(1) V
Idd 85 mA
Ivn 15 mA
ower supply
ILED 300 mA
Input voltage at digital high Vih Vdd-1.0 Vdd-.5 Vdd V
Input voltage at digital low Vil 0 0.8 V
Clock frequency f 4.0 MHz
Clock pulse high duty cycle 25 %
Clock pulse high duration Clock 62.5 (2) ns
Integration time Tint 0.176(3) ms
Operating temperature Top 25 50 0C
Notes:
1. VLED sources are also available from 5 to 24V.
2. Clock pulse high is specified at 4.0MHz at 25 percent duty. the reference generator is set to match the initial exposure
recommended that the parameters be factory adjusted for
the specific applications
3. The tint is specified with the maximum 4.0MHz clock frequency. In operation, the time constants in
time, hence the optimum integration time will be set by optimum integration time. Accordingly, it is highly
7.0 Switching Characteristics (25°C)
The switching characteristics for the I/O clocks are shown in Figure 4. T he timing parametric values and their s ymbols are given in the
Table 4.
Figure 4: Module Timing Diagram
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AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
Table 4: Switching Parameters and Timing Symbol Definitions
Parameter Symbol Min. Typ. Max. Units
Clock cycle time to 0.50 µs
Clock pulse width tw 62.5 ns
Clock duty cycle 25 50 %
Prohibit crossing time of SP tprh 15 ns
Data setup time tds 20 ns
Data hold time tdh 20 ns
Signal delay time tdl 50 ns
Signal settling time tsh 120 ns
Digital signal delay tddl 60 ns
Digital signal off delay tdodl 20 ns
8.0 Absolute Maximum Rating
Table 5: Absolute Maximum Rating
Parameter Symbols Maximum Rating Units
Power supply voltage Vdd 10 V
Idd 100 mA
Vn -10 V
In 30 mA
VLED 5.5 V
ILED 400 mA
Input clock pulse (high level) Vih Vdd - 0.5 V
Input clock pulse (low level) Vil -0.8 V
Table 6: Operating Environment
Parameter Symbols Maximum Rating Units
Operating temperature Top 0 to 50 °C
Operating humidity Hop 10 to 85 %
Storage temperature Tstg -25 to +75 °C
Storage humidity Hstg 5 to 95 %
9.0 Setup and Adjustments
9.1 The Clock Rate and Integration Time
This was factory set to a specific application. See Note 1 under Table 2.
The clock frequency was set to 2.0MHz.
The total integration time was set to 360µsec.
9.2 The Required Power
he required power is slightly greater than the specifi ed values in Table 3.
Circuit Power:
Positive supply: +5V @ 90mA
Negative supply: -5V @ 20mA
LED power: +5V @ 300mA
T
•
•
•
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AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
9.3 Adjustments
n of test, adjustment tor points.
yout of the controls a nd t s points. These a ntiometer the test points are shown
to the output pads for power. This ew of the PCB’s backside with the glass
facing down on the documents.
V is for the analog image pixels, just as it is produced at of the CIS arra ction, and prior to its entry
digitizer circuit.
he tracking reference level from the trackin g di gitizer circuit.
The test point labeled TV D is the digital o utp ut from the comparator.
stment potentiometer that is accessed through adjustment hole as viewed in Figure 5.
sed through the hole as it is viewed in Figure 5.
These adjustments will be pre-adjusted to the customer’s specific application at the factory; therefore, in general will not require
he test point TV is probed with a scope to monitor the analog image pixel levels. The probe should be
module as possible. If possible, it should be grounded right on the ground input lead, Pin 5, of the I/O
l adjust (OFFSET ADJ) is shown in Figure 5. This potentiometer is adjusted to place the dark level of the analog
nal to approximately 1.0V and is normally adjusted with intended targets.
ted greater than 2.5 an d less than 3.0V with the CIS imaged on a standard white target, similar to
er.
General locatio
and moni
Figure 5: AMIS-710216 Monitor and Test P oints
Figure 5 sho ws the pictorial la he t est
LED light djustment pote
is a bird’s eye vi s and
relative to the connector and
dulewindow of the mo
beled TThe test point la
to the tracking th ute outp y se
in
The test point labeled TR is the output of t
The offset adjust, R18, is a screw driver adju
Gain adjust, R16, is a screw driver adjustment potentiometer that is acces
9.4 There Are Only Two Adjustments
adjustments by the user. T
grounded as close to the CIS
connector.
Analog zero signa
age pixel sigim
Analog gain adjust, “GAIN”, is adjus
the standard white copy or typing pap
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AMIS-710216: 200dpi Two Level Digital Output Module Data Sheet
11.0 Company or Product Inquiries
For more information about AMI Semiconductor, our technology and our product, visit our Web site at: http://www.amis.com
North America
Tel: +1.208.233.4690
Fax: +1.208.234.6795
Europe
Tel: +32 (0) 55.33.22.11
Fax: +32 (0) 55.31.81.12
Production Technical Data - The information contained in this document applies to a product in production. AMI Semiconductor and its subsidiaries (“AMIS”) have made every effort to ensure
that the information is accurate and reliable. However, the characteristics and specifications of the product are subject to change without notice and the information is provided “AS IS” without
warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify that data being relied on is the most current and complete. AMIS
reserves the right to discontinue production and change specifications and prices at any time and without notice. Products sold by AMIS are covered by the warranty and patent
indemnification provisions appearing in its Terms of Sale only. AMIS makes no other warranty, express or implied, and disclaims the warranties of noninfringement, merchantability, or fitness
for a particular purpose. AMI Semiconductor's products are intended for use in ordinary commercial applications. These products are not designed, authorized, or warranted to be suitable for
use in life-support systems or other critical applications where malfunction may cause personal injury. Inclusion of AMIS products in such applications is understood to be fully at the
customer’s risk. Applications requiring extended temperature range, operation in unusual environmental conditions, or high reliability, such as military or medical life-support, are specifically
not recommended without additional processing by AMIS for such applications. Copyright © 2006 AMI Semiconductor, Inc.
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