NOM02A4-AR03G - ON Semiconductor

March, 2012 − Rev. 1

1Publication Order Number:

NOM02A4−AG01G/D

NOM02A4-AG01G

200DPI Contact Image

Sensor Module

Description

The NOM02A4−AG01G contact image sensor (CIS) module

integrates a green LED light source, lens and image sensor in a

compact housing. The module is designed for document scanning,

mark reading, gaming and office automation equipment applications

and is suitable for scanning documents up to 216 mm wide. An analog

video output achieves a scanning rate of 1.728 ms/line. The

NOM02A4−AG01G module employs proprietary CMOS image

sensing technology from ON Semiconductor to achieve high−speed

performance and high sensitivity.

Features

•Light Source, Lens and Sensor are Integrated Into a Single Module

•216 mm Scanning Width at 7.9 dots per mm Resolution

•1.728 msec/Line Scanning Speed @ 1.0 MHz Pixel Rate

•Analog Video Output

•Supports A4 Paper Size at up to 15 Pages per Minute

•Green LED Light Source

•Wide Dynamic Range

•Compact 232.1 mm x 19.2 mm x 13.7 mm Module Housing

•Low Power

•Light Weight 2.1 oz Packaging

•These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

Applications

•Gaming Machines

•Fax Machines and Document Scanning

•Mark Readers Including Balloting and Test Scoring

•Office Automation Equipment

Motor

Contact Image

Sensor Module

Paper Insertion

Sensing Switch

Motor Controller

and Driver

Scan System

Timing and Control

Analog to Digital

Converters

Parallel Port

Transceiver

LED Drivers

DSP

Figure 1. Typical Scanner Application

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IMAGE SENSOR MODULE A4

CASE MODAC

MARKING DIAGRAM

YY = Year

MM = Month

SSSSSS = Serial Number

G = Pb−Free Package

CONNECTOR PIN ASSIGNMENT

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

ORDERING INFORMATION

VLED

GLED

VSS

GND

VDD

GND

VOUT

123 1045 9867

NOM02A4−AG01G

YYMMSSSSSS

GND

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Table 1. ORDERING INFORMATION

Part Number Package Shipping Configuration

NOM02A4−AG01G (Pb−free) 100 per packing carton

1 2 3 4 1728

Shift Register

Photo Sensor Array

Rod Lens

Buf

VLED

GLED

VDD (+5 V)

GND

VSS (−5 V)

Green LED Light Bar

Pixel 1 corresponds to connector end of the module

Amp VOUT

1 2 3 4

Figure 2. Simplified Block Diagram

Table 2. PIN FUNCTION DESCRIPTION

Pin Pin Name Description

1 VOUT Analog Video Output

2 GND Ground

3 VDD +5 V power supply

4 VSS −5 V to −12 V power supply

5 GND Ground

6 SP Shift register start pulse

7 GND Ground

8 CP Sampling clock pulse

9 GLED Ground for the LED light source

10 VLED Power supply for the LED light source

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Table 3. ABSOLUTE MAXIMUM RATINGS

Parameter Symbol Value Unit

Power supply voltage VDD 7 V

VSS −15 V

VLED 6 V

Power supply current ILED 600 mA

Input voltage range for SP, CP Vin −0.5 to VDD + 0.5 V

Storage Temperature TSTG −20 to 75 °C

Storage Humidity, Non−Condensing HSTG 10 to 90 %

ESD Capability, Contact Discharge (Note 1) ESDHBM $2 kV

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

1. This module assembly has been ESD tested to IEC61000−4−2 (HBM) Contact Discharge

Table 4. RECOMMENDED OPERATING RANGES (Unless otherwise specified, these specifications apply TA = 25°C) (Note 2)

Parameter Symbol Min Typ Max Unit

Power supply voltage (Note 3) VDD 4.5 5 5.5 V

VSS −12 −5−4.5 V

VLED 4.5 5 5.5 V

Power supply current IDD 53 60 67 mA

ISS 5.0 6.0 7.0 mA

ILED 400 450 500 mA

Low level input voltage for SP, CP VIL 0 0 0.8 V

High level input voltage for SP, CP VIH 4.5 5.0 VDD + 0.3 V

Line scanning rate (Note 4) Tint 6.91 1.728 0.864 ms

Clock frequency (Note 5) f 0.25 1.0 2.0 MHz

Clock period to0.5 1.0 4.0 ms

Clock pulse width (Note 6) tw125 250 1000 ns

Clock pulse high duty cycle DCCP 20 25 60 %

Start pulse width (Note 6) twSP 150 180 480 ns

Start pulse setup time tsu 20 ns

Start pulse hold time th20 ns

Prohibit crossing time (Note 7) tprh 20 ns

Clock to Video output propagation delay rising tpcor 150 ns

Clock to Video output propagation delay falling tpcof 20 ns

Operating Temperature Top 0 50 °C

Operating Humidity, Non−Condensing Hop 10 60 %

2. Refer to Figure 3 for more information on AC characteristics

3. VLED directly affects illumination intensity, which directly affects VOUT

4. Tint is the line scanning rate or integration time. Tint is determined by the interval between two start pulses. The clock is proportional to Tint.

5. Main clock frequency (f) corresponds to the video sampling frequency.

6. Min, Typ, Max specifications reflect operation at the corresponding Min, Typ, Max clock frequency.

7. Prohibit crossing time is to insure that two start pulses are not supplied in the same scan line time. SP may only be active high during one

falling edge of CP for any given scan.

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Table 5. PHYSICAL SPECIFICATIONS

Parameter Symbol Typ Unit

Scan width PDw216 mm

Number of Photo Detector Arrays PDAn27 arrays

Number of Photo Detectors PDn1728 elements

Table 6. PHYSICAL CHARACTERISTICS

Parameter Symbol Min Typ Max Unit

Pixel pitch PDsp 125 mm

Inter−array spacing PDAsp 150 180 210 mm

Inter−array vertical alignment PDAvxp −40 0 40 mm

Green LED peak wavelength lp561 575 nm

Table 7. ELECTRO−OPTICAL CHARACTERISTICS TEST CONDITIONS

Parameter Symbol Value Unit

Power supply voltage VDD 5.0 V

VSS −5.0 V

VLED 5.0 V

Clock frequency f 1.0 MHz

Clock pulse high duty cycle DCCP 25 %

Line scanning rate Tint 1.728 ms

LED arrays pulsed time on (Note 8) LED_Ton 26 ms

LED arrays pulsed time off (Note 8) LED_Toff 356 ms

Operating Temperature Top 25 °C

8. Production tested with pulsing LEDs.

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Table 8. ELECTRO−OPTICAL CHARACTERISTICS (Unless otherwise specified, these specifications were achieved with the

test conditions defined in Table 7)

Parameter Symbol Min Typ Max Unit

Bright analog output voltage (Note 9) Vpavg 0.9 1.0 1.1 V

Bright output non−uniformity (Note 10) Up−30 30 %

Bright output non−uniformity total (Note 11) Uptotal 60 %

Adjacent pixel non−uniformity (Note 12) Upadj 25 %

Dark output voltage (Note 13) Vd200 mV

Dark non−uniformity (Note 14) Ud200 mV

Modulation transfer function at 50 line pairs per in (lp/in) (Note 15) MTF50 40 %

Modulation transfer function at 100 line pairs per in (lp/in)

(Notes 15, 16)

MTF100 20 %

9. Vpavg = Ȍ Vp(n)/1728, where

Vp is the pixel amplitude value of VOUT for a bright signal defined as a white document with LEDs turned on,

n is the sequential pixel number in one scan line.

10.Up = [(Vpmax – Vpavg)/Vpavg] x 100%, or [Vpavg – Vpmin)/Vpavg] x 100%, whichever is greater, where

Vpmax is the maximum pixel voltage of any pixel at full bright

Vpmin is the minimum pixel voltage of any pixel at full bright

11. Uptotal = [(Vpmax – Vpmin)/Vpavg] x 100%,

12.Upadj = MAX [ | (Vp(n) – Vp(n+1) | / Vp(n)] x 100%, where

Upadj is the nonuniformity in percent between adjacent pixels for a bright background

13.Vd is the pixel amplitude value of VOUT for a dark signal defined as a black document with LEDs turned off

14.Ud = Vdmax – Vdmin, where

Vdmax is the maximum pixel voltage of any dark pixel with the LEDs turned off

Vdmin is the minimum pixel voltage of any dark pixel with the LEDs turned off

15.MTF = [(Vmax – Vmin)/(Vmax + Vmin)] x 100%, where

Vmax is the maximum output voltage at the specified line pairs per inch (lp/in)

Vmin is the minimum output voltage at the specified lp/in

16.For information only.

Figure 3. Timing Diagram

VOUT

Pixel 1 Pixel 2 Pixel 3 Pixel 4

GND

twSP

tsu

tprh

tpcof

VdVp

tpcor

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DESCRIPTION OF OPERATION

Functional Description

The NOM02A4−AG01G module consists of 27 contact

image sensors, each with 64 pixel elements, that are

cascaded to provide 1728 photo−detectors with their

associated multiplex switches and double−buffered digital

shift register that controls its sequential readout. A buffer

amplifies the video pixels from the image sensors and output

the analog video signal of the module as shown in Figure 2.

In operation, the sensors produce an analog image pixel

signal (or video signal) proportional to the exposure on the

corresponding picture elements on the document. The

VOUT signal outputs 1728 pixels for each scan line. The

first bit shifted out from VOUT during each scan represents

the first pixel on the connector end of the module.

A pictorial of the NOM02A4−AG01G cross section view

is shown in Figure 4. Mounted in the module is a one−to−one

graded−index micro lens array that focuses the scanned

document image onto the sensing plane. Illumination is

accomplished by means of an integrated LED light source.

All components are housed in a small plastic housing, which

has a glass cover. The top surface of the glass acts as the focal

point for the object being scanned and protects the imaging

array, micro lens assembly and LED light source from dust.

PCB

Sensors

Rod

Lens LED BarModule Housing

Document Surface Glass Window

Light Path

Figure 4. Module Cross Section View

Connector Pin Out Description

Connections to the module are via a 2.4x14.50mm 10−pin

connector (ECE part number EBW−PK23−P010L2−3Z)

located at one end of the module as shown in the package

drawing on page 8. The location of pin number 1 is

indicated on the package drawing.

Scanner Applications

A typical use of the NOM02A4−AG01G module in

scanner applications is shown in Figure 6. The document to

be digitized is fed into the scanner where a sensor detects its

presence. The scanner then operates the motor to move the

paper under the contact image sensor module. The module

illuminates the paper with internal LEDs and the image

sensor pixel array detects the amount of reflected light and

simultaneously measures a full line of pixels which are

sampled and transferred to a FIFO for storage and

conversion to a parallel output format. Once the pixel line is

processed, the motor advances the paper and the next scan

line is captured.

Initialization

Document

Detected?

Start Scan

SP= , CP= CTR=0

Transfer Scan Line Data

Done

CTR++ == 1728

yes

Document

Detected?

CP=

Initialization

Document

Detected?

Start Scan

SP= , CP= CTR=0

Read Pixel into Memory

Transfer Scan Line Data

Done

yes

Document

Detected?

CP=

Figure 5. Typical Scanner Algorithm

Figure 5 outlines the basic steps in the scanner control

sequence. First the circuits are initialized and the scanner

waits for a document to be detected, usually by a paper

sensing switch. Then a start pulse and clock pulse are

supplied to capture a line image. At the next clock pulse the

first pixel value appears on the output. The pixel can be

stored in a local line buffer memory. Subsequent clocks

cause the remaining pixels to be shifted out and stored in the

line buffer. Once the complete line has been shifted out it can

be transferred to the host application and the system

advances the paper and the line scan process repeats until the

paper sensing switch indicates the document has passed

completely through the scanner.

Device Marking and Barcode Description

Each module is marked with a tag that contains the part

number, a number combining the manufacturing date code

and serial number and a barcode. The barcode presents the

date code and serial number in Interleave 2 of 5 barcode

format as follows

YYMMSSSSSS

where YY is the year,

MM is the month, and

SSSSSS is the serial number.

Glass Lens Care

Precautions should be taken to avoid scratching or

touching the glass lens. The glass lens may be cleaned with

alcohol.

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Figure 6. Typical Scanner Assembly

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PACKAGE DIMENSIONS

IMAGE SENSOR MODULE A4

CASE MODAC

ISSUE A

NOTES:

1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994.

2. CONTROLLING DIMENSION: MILLIMETERS.

3. LEADING EDGE OF THE APPROACH ANGLE ON THE GLASS IS

LOWER THAN THE TOP OF THE HOUSING.

4. BORE DEPTH IS 6.0 WITH A 0.3 LEAD−IN CHAMFER.

5. PIN HEADER, MODEL NUMBER EBW−PK23−P010L2−3Z, 1X10 PIN,

PITCH 1.25.

6. GLASS IS GLUED ON ALL 4 SIDES.

7. GLASS THICKNESS IS 1.85.

8. USE M2.3 SELF TAPPING SCREWS FOR MOUNTING. TORQUE

SCREWS BETWEEN 1.80 KGF−CM AND 2.00 KGF−CM.

9. DIMENSION D1 DENOTES THE SCAN LENGTH.

10. DIMENSION K DENOTES THE POSITION OF THE FIRST PIXEL.

DIM

MIN MAX

12.60 13.60

MILLIMETERS

A1 5.45 6.45

B17.70 18.30

B1 18.90 19.50

D1 216.00 REF

E2.10 2.30

F112.50 113.50

H34.80 35.80

J5.70 6.30

K5.30 7.30

B2 5.50 6.50

C15.40 15.60

D231.60 232.60

6.00 REF

A2 13.20 14.20

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PACKING DIMENSIONS

NO. NAME MATERIAL

1Shockproof Pad EPE

2Packing Tray POLYFOAM

3Conduct Electricity Sheet PE + CONDUCTIVE SHEET

4Waterproof Bag PE

5Packing Box−Carton KRAFT PAPER

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operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights

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