AMIS-710214 - AMI Semiconductor, Inc.

AMIS-710214: 200dpi Two Level Digital Output Module Data Sheet

1.0 General Description

The AMIS-710214 (PI214MC-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 AMI Semiconductor’s CIS

module that employs MOS image sensor technology to gain its high-speed performance and high sensitivity. The AMIS-710214 is

suitable for scanning documents with width of 216mm and with resolution of 8 dots per m illimeter (dpm). It has broad app lications, but

is specially designed for the following areas:

• 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-710214 have been referred to as the “dynamic threshold” two-level A/D

converter. For the purpose of descri bing the modu le’s chara cterist ics this “dynam ic thres h old” proc essing circuit s hall he rein 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, 216mm scanning length

• Up to 440µsec/line scanning speed, with 4.0MHz pixel rate (See Table 3, Note 2)

• Wide dynamic range

• Two-level tracking digital output (“Dynamic Threshold Digitizer”)

• Red (660nm) light source (other colors ar e available)

• Compact size ≅ 19.5mm x 21.5mm x 232mm

• Low power

• Light weight

3.0 Module Description

Figure 1: Block Diagram of AMI S-710214

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AMIS-710214: 200dpi Two Level Digital Output Module Data Sheet

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The AMIS-710214 module consists of 27 sensors that are cascaded to provide 1728 photo-detectors with their associated multiplex

switches and a digital shift register that controls its sequential readout. Mounted in the module is a one-to-one graded-indexed micro

lens array that focuses the scanned documents to image onto its sensing plane. A buffer amplifier amplifies the video pixels from the

image sensors and passes them to analog digitizing circuit, where video pixels are converted to digital signal and passed to out put of

the module. See Figure 1.

Illumination is accomplished b y means of an integrated LED light source. All components are housed in a small plastic housi ng, which

has a cover glass, which act s as the focal point for the object being sc anned and protects the imaging array, micro lens assembly and

LED light source from dust. The pictorial of AMIS-710214 cross section is shown in Figure 2.

Figure 2: Inside Pictorial of the Module

I/O to the module is a 2 x 2mm 16-pin unshr ouded connector (see I/O pin assignment, under Specifications) located on one end of the

module (see module drawing).

AMIS-710214: 200dpi Two Level Digital Output Module Data Sheet

4.0 Circuit Description and Operation

See Figure 3, which is a simplified block diagram of the analog tracking digitizer. Fundamentally, the tracking digitizer transforms the

ignal output from a CIS modules existing on the market toda y.

It takes the analog signal from the CIS section of AMIS-710214 and derives a tracking background reference signal. Then this

reference is compared against the output signals from the CIS section. The resulting signal from comparison produces a two-level

igure 1, AMIS-710214 block diagram depicts the two basic circuits, the CIS (image sensors and video amplifier) and the tracking

digitizer. In the CIS section, the modul e has 27 seriall y concat enated PI3004B im age sen sors, accordingl y, the image sensors will span

one scanning-read line width that is 27 sensor times 64 pixe l elements/sensor, or 1728 pi xel elements.

In operation, the module produces the analog image pixel signals that are proportional to exposure on the corresponding picture

element on the document (the video signal) then passes the signal to the tracking digitizer. In turn, the digitizer processes the analog

image pixels to digital image pixels. The analog image pixels, at test point TV, are separated into two signals. One generates the

reference signal and the other remains unmodified. These unmodified image pixels are applied to one of the input of the comparator.

The reference signal is applied to the second input of the co mparator. The results of the comparison are the digital image pixels. This

digital output is produced in two levels, determined by the difference between the background reference signal and the analog image

pixels. A digital pixel output of value “one” represents the analog ima ge pixel that is brig hter than the background and digital pixel level

of value “zero” represents the imag e pixel that is darker than background.

Figure 3: Analog Signal Reference Generator and a Single- bit Comparator

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.

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AMIS-710214: 200dpi Two Level Digital Output Module Data Sheet

5.0 Specifications

The I/O Connector is a Molex connector, part number 87049-1616, and its pin numbers and their functions are listed in Table 1.

Table 1: Pin Configuration

Pin Number Symbol Names and Functions

1 ,2, 4, & 8 GRD Ground; 0V

3 DIGOUT Digital video output

5 & 6 VDD Positive power supply

7 SP Start Pulse for the shift register

9 & 10 Vn Negative power supply

11 & 12 Clock (CP) Clock for the shift register

13 & 14 GLED Return for the LED light source

15 & 16 VLED Power in for the LED light source

5.1 Inputs

here are five inputs:

Clock (CP): This is the input for the main sampling clock.

SP: This is the start pulse input for initiating the scan.

VDD: This is an input for the + 5V positive supply.

VN: This is the input for the -5V negative supply.

VLED: This is the input for the +5V power supply for the LED light source.

ote: Power return for the LED light source is GLED on Pin 13 &14, where as the rest of ground returns are on Pins 1, 2, 4, & 8.

DIGOUT on Pin 3 of the I/O connector is the only output I/O. Pin 3 is the digital video output from the CIS module. Reflection off the

dark target produces a digital signal of “0” level, while the white reflection off the white target produces a digital level of “one”. The

6.0 ptical Char stics at

•

5.2 Video Output

amplitudes of the white and dark are listed in the table below:

E Olectro- a ricte 25 C

Table 2: ptical Characteristics at 2Electro-O 5 °C

Parameter Symbol Parameter Units Note

Number etectors Elements of photo d 1728

Pixel-to-pixel spacing 125 µm

Line sca Tint(1) µsec @ 4.0MHz clock

frequency

nning rate 440

Clock frequency f 4.0 MHz

Bright output

Dark output Digital video output signal >3.2

<0.8 V

Note:

1. The tint is specified with a 4.0MHz clock frequency. In operation

generator’s time constant will determine the optimum integration

the time constants in the reference generator are set to match the initial exposure time, hence the

time. Note, the integration time is also a function of the clock frequency. Accordingly it is highly

pecific applications. recommended that the parameters be factory adjust for the s

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AMIS-710214: 200dpi Two Level Digital Output Module Data Sheet

Table 3: Recommended Operating Conditions (25°C)

Item Symbol Min. Mean Max. Units

Vdd 5.0 V

Vn. -5.0 V

VLED

Power supply

5.0 V

Idd 350 mA

Ivn 20 mA

ILED 390 450 mA

Input voltage at digital high Vih Vdd-1.0 Vdd-0.5 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 (1) ns

Integration time Tint 0.440 ms

(2)

Operating temperature Top 25 50 °C

Notes:

1. Clock pulse high is specified at 4.0MHz at 25 percent duty.

is specified with a 4.0MHz clock frequency. In operation the time constan the reference generator are set to match posure time, hence the

stant of the reference generat ntegration gly it is hi commended that the s be factory adjust

e specific applications.

7.0 Sw

2. The tint

con ts in the initial ex

time

for th or will determine the optimum i time. Accordin gh rely parameter

itching Characteristics (25°C)

The switching characteristics for the I/O clocks are shown in Figure 4. The timing parametric values and their symbols are given in

Table 4.

Figure 4: Module Timing Diagram

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AMIS-710214: 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 ns 250

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 50 ns

Digital signal off delay tdodl 20 ns

8.0 Absolute Maximum Rating

Table 5: Absolute Maximum Rating

Parameter Symbols Maximum Rating Units

Vdd 10 V

Idd 375 mA

Vn -10 V

Ivn 30 mA

VLED 5.5 V

Power supply voltage

ILED 450 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 %

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AMIS-710214: 200dpi Two Level Digital Output Module Data Sheet

9.0 Mechanical Structure

Figure 5: Mechanical Structure

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AMIS-710214: 200dpi Two Level Digital Output Module Data Sheet

10.0 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 non infringement, 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

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