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Features
* * * * * * * *
Data Rate up to 50 MHz (2 Outputs at 25 MHz Each) Pixel Size: 10 m x 10 m (10 m Pitch) 300 to 1100 nm Spectral Range High Sensitivity and Lag Free Photodiodes Very Low Noise (30 pJ/cm2 Noise Equivalent Illumination) Antiblooming Exposure Control 20-lead 0.4" DIL Package
Description
TH7815 linear arrays are based on Atmel's most recent technology in terms of design and performance. The flexibility and performance of these devices provide the opportunity to use them in most vision systems for industrial applications (web inspection, process control, sorting and inspection of various parts), document scanning up to 200 dpi and metrology.
50 MHz 4096 Linear CCDs TH7815ACC
Pin Identification
All pins must be connected.
Pin Number 4, 17 3, 18 5 20 2 14 13 15 10 7 8 11 1, 6, 9, 12, 16, 19 Symbol VDD1,2 VOS1,2 VS VDR VGS L1 L2 R A VA VST P VSS Function Output Amplifiers Drain Supply Video Outputs Output Amplifiers Substate Bias Reset Drain Supply Output Gate Bias Readout Register Clocks Reset Clock Antiblooming Gate Bias/Clock Antiblooming Drain Bias Storage Gate Bias Transfer Gate Clock Ground, Optical Grounding (Internally Connected)
VSS VGS VOS1 VDD1 VS VSS VA VST VSS A
1 20 2 19 3 18 4 17 5 16 TH7815ACC 6 15 7 14 8 13 9 12 10 11
VDR VSS VOS2 VDDR VSS R L1 L2 VSSP
Rev. 1995A-IMAGE-04/02
1
Absolute Maximum Ratings*
Storage Temperature Range ......................... -55C to +150C Operating Temperature Range........................ -40C to +85C Thermal Cycling........................................................ 15C/min Maximum Applied Voltages: * Pins 2, 8, 10, 11, 13, 14, 15 ................................. -0.3 to 15V * Pins 4, 5, 7, 17, 20 .............................................. -0.3 to 16V * Pins 1, 6, 9, 12, 16, 19 ........................................0V (ground) Note: Stresses above those listed under absolute maximum ratings may cause permanent device failure. Functionally at or above these limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability.
- -
Operating range defines the limits within which the functionality is guaranteed. Electrical limits of applied signals are given in operating conditions section.
Operating Precautions
Shorting the video outputs to any other pin, even temporarily, can permanently damage the on-chip output amplifier.
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TH7815ACC
Operating Conditions
Table 1. DC Characteristics
Value Parameter Output Amplifier Drain Supply Storage Gate Bias Antiblooming Gate (See Pixel Saturation Adjustment) Reset Bias Antiblooming Diode Bias Register Output Gate Bias Output Amplifier Source Supply Ground Symbol VDD1, VDD2 VST A VDR VA VGS VS VSS Min. 14.5 2.2 2 13.5 14.5 2.2 Typ. 15 2.4 4 14 15 2.4 0 0 Max. 15.5 2.6 7 14.5 15.5 2.6 Unit V V V V V V V V
Table 2. Drive Clocks Characteristics
Value Parameter Reset Gate High Level Low Level Transfer Gate High Level Low Level L1, 2 Readout Register Clocks High Level Low Level 8.5 -0.1 9 0 9.5 0.4 V V
L1 460 pF 200 pF L2 500 pF
Symbol R
Min. 8.5 -0.1
Typ. 9 0 9 0
Max. 9.5 0.4 9.5 0.4
Unit V V
Remarks Clock Capacitance < 50 pF
P 8.5 -0.1 V V
Clock Capacitance < 200 pF
Maximum Readout Register Frequency
FH
10
25
MHz
3
1995A-IMAGE-04/02
Timing Diagrams
The following diagram shows the general clocking scheme for TH7815ACC. The line is composed as follows:
Number of Prescan Pixels Per Output 4 Number of Useful Pixels Per Output 2048 Total Number of Pixels Per Output 2052
Synopsis TH7815ACC
Postscan elements may be added in order to either increase the exposure time, or to provide a voltage reference level. Figure 1. Line Timing Diagram
Line Period A P L1 L2 R
Transfer Period
The following diagram shows the timing for the transfer period: Figure 2. Line Transfer Period
> 300 ns
> 10 ns A P L1 L2 R
(700 ns typ.) > 10 ns
first prescan pixel
R clock may also be held in high state during line transfer period.
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TH7815ACC
The following diagram shows the detailed timing for the pixel readout: Figure 3. Pixel Readout Timing Diagram
Tpixel
90%
L1
tr
10%
90%
Duty cycle: 50% 10% Crossover at 50% 10% Rise and fall time 10 ns
L2 0 ns R
50%
tf
10%
10 ns
Rise and fall time 8 ns
floating diode level Reset Feedthrough
Video outputs are synchronous Video signal occurs on L2 falling edge
Offset in darkness Video signal VIDEO OUTPUTS
First useful pixel occurs on 5th falling edge of L2 after P
Exposure Time Reduction
Antiblooming Gate High Level Low Level Pulse Min.
The TH7815ACC antiblooming structure provides an electronic shutter capability by clocking phase A during the line period. The timing diagram is described below:
A Min. 8.5 2 200 ns Typ. 9 4 Max. 9.5 7 Unit V V Clock Capacitance < 200 pF Low Level Sets Saturation Level See Pixel Saturation Adjustment
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Figure 4. Exposure Time Reduction
Line Period
High l eve l
A P L1 L2 R
100 ns
exposure time
Low level
Transfer Period
Electro-optical Performance
General test conditions TCASE = 25C Light source: 2854K with 2 mm BG38 filter (unless specified) + F/11 optical aperture. Typical operating conditions: 2 x 10 MHz. All values are referred to prescan pixels level.
Value
Parameter Saturation Output Voltage Responsivity Responsivity Unbalance Photo Response Non-uniformity Peak-to-peak Dark Signal Dark Signal Non-uniformity (1) Temporal RMS Noise in Darkness Dynamic Range CTF LAG Charge Transfer Inefficiency (Per Stage)
Symbol VSAT R
Min. 1.3 7.5
Typ. 1.6 8.5 2
Max. 3
Unit V V/J/cm2
Remarks
5 10 0.4 0.1
% % VOS mV/ms mV/ms V VOS = 50 mV to 1.2V
PRNU DS DSNU VN DR CTF LAG HCTI 4,300
5 0.1
300 5,300 65 1 8.10-5
% %
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TH7815ACC
Static and Dynamic Electrical Characteristics
Value Parameter Output Amplifier Supply Current Output Impedance DC Output Level Output Conversion Factor Offset In Darkness Reset Feedthrough Symbol IDD ZS VREF CVF DC off Vft 200 Min. Typ. 10 225 10 5 30 400 250 Max Unit mA V V/emV mV Remarks per amplifier
Electro-optical Performances Without Infrared Cutoff Filter
Parameter
The TH7815ACC special semiconductor process enables to exploit the silicon's high near infrared sensitivity while maintaining good imaging performances in terms of response uniformity and resolution. Typical changes in performance with and without OR filtering are summarized below:
With IR Cut-off Filter VOS 5% 65%
Without IR Cut-off Filter 6 x VOS 5% 40%
Average Video Signal Due to a Given Scene Illumination PRNU (Single Defects Excluded) CTF at Nyquist Frequency
Pixel Saturation Adjustment
TH7815ACC antiblooming structure can be used to adjust the maximum saturation voltage, by adjusting the A bias voltage. The following curve shows the relationship between VSAT and VA.
Figure 5. Pixel Saturation Antiblooming Bias (Typical conditions)
Typical conditions
3
Saturation Voltage
2 (V) 1 0 2
3
4 (V)
5
6
7
Antiblooming Bias
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Spectral Responsivity
The following curve shows the typical spectral responsivity for TH7815ACC:
12 10 Responsivity (V/J/cm) 8 6 4 2 0 200
300
400
500
600
700
800
900
1000
1100
Wavelength (nm)
Packaging Drawing
49.00.1 1st pixel
9.50.1
Ztop
Zbot
5.1 0.1
4.5 0.1
Dimensions in mm
mechanical Ztop Zbot 1.9 20.32 2 .720.25
optical 1 .610.25 3.030.28
Ordering Code
TH7815ACC
8
TH7815ACC
1995A-IMAGE-04/02
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(c) Atmel Corporation 2002. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems.
ATMEL (R) is the registered trademarks of Atmel. Other terms and product names may be the trademarks of others. Printed on recycled paper.
1995A-IMAGE-04/02 0M

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