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MATRIX
LINEAR OPTOELECTRONIC INTEGRATED ARRAYS FOR PARALELL PROCESSING
 
Starting date:  September 1995
Closing date: September 1996
 
Main goal: Monitoring the textile thread quality
User: SELTEX Ltd. (National Research Program "ORIZONT 2000")
Partners: IPRS Baneasa SA (silicon foundry)
Team: Mira Caldararu (project manager and device design and testing)
  Nicolae Bunea (device design and testing)
  Anca Paraschiv (layout project)
  Sorin Negru (mask project and manufacturing, chip manufacturing)
  Constantin Klier (encapsulation)
 
Project description
We have designed and produced two linear optoelectronic arrays (MAT 16 and MAT 32). MAT 16 is an image sensor with 16 bipolar photodiodes. It is designed for parallel output, as it has 16 separate output connections. The photodiodes cathodes are connected together. The matrix is designed for those applications where low capacitance and fast speed of response are important. MAT 32 has 32 elements, each element being composed of a photodiode, coupled with a bipolar amplifier transistor. The whole matrix is bipolar integrated. It is designed for parallel output, as it has 32 separate output connections. The photodiode - transistor connection enables different types of applications, analogue or digital ones. The output transistor supplies a 100 times larger photocurrent than the photodiode and the open output collector might be connected function the application requirements. TTL compatible output might be obtained. Through these characteristics, MAT 32 array might be used in specialised applications, where the design requires a more flexible approach than can be obtained by using a CCD array. The parallel output assures also a response time much smaller than that of the response time of an entire CCD linear matrix (all the elements).
 
Applications Absolute Maximum Ratings
Optical character recognition
Storage Temperature -25oC to 60oC
Textile yard characterisation
Operating Temperature 0oC to 70oC
Document scanning
Supply and Output Voltage (VCC )      -0.5 V to 15 V
Inspection
Power Dissipation 200 mW
Noncontact measurement  
Spectrometric measurements  
Position measurement  
 
Position measurement Opto-Electrical Specifications (TA = 25oC)
Parameter
Function
Sym.
Min.
Matrix
Typ.
Max.
Units
Test Conditions
Dark Output Current
Each element
IOD
MAT 32
MAT 16
10
5
500
50
nA
Ee = 0
VO = VCC = 5 V
Dark Supply Current
Whole matrix
ICCD
MAT 32
0.5
35
μA
Ee = 0
VO = open
VCC = 15 V
Supply Current under Illumination
Whole matrix
ICCL
MAT 32
1.5
mA
Ee = 100 mW/cm2
λ = 0.9 μm
VCC = 15 V
Saturation Output Voltage
Each element
VOL
0.2
0.4
V
Ee = 100 mW/cm2
λ = 0.9 μm
VCC = 5 V
Responsivity
Each element
R0.9
20
MAT 32
Mat 16
30
0.5
A/W
Ee = 50 mW/cm2
λ = 0.9 μm
VCC = 5 V
Spectral Range
Each element
Δλ
0.45 - 0.95
μm
Ee = 50 mW/cm2
VCC = 5 V
Response time
Each element
tr
MAT 32
MAT 16
1
1
5
10
μs
ns
Ee = 50 mW/cm2
λ = 0.9 μm
VCC = 5 V
RL = 5.6 kΩ
No. of elements
MAT 32
MAT 16
32
16
Array length
3.2
mm
Array width
1
mm
Spacing
20
μm
 
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