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November 1999 1/16

TH7888A

AREA ARRAY CCD IMAGE SENSOR

1024 × 1024 PIXELS WITH ANTIBLOOMING

1024 x 1024 pixels with memory zone

Up to 30 images / second

Built-in antiblooming device providing

an electronic shutter function.

Pixel : 14 mmx14mm

Image zone : 14,34 x 14,34 mm²

2 outputs at 20 MHz each

Readout through 1 or 2 ouputs

Possible binning2x2

Optical shield against parasitic

reflexions and stray light

A/R window in 400 - 700 nm bandwidth

Optional integrated Peltier cooler

PIN IDENTIFICATION

Pin N° Symbol Designation

Y9 FP1

Image zone clocks

AA9 FP2

Y10 FP3

AA10 FP4

Y5 FM1

Memory zone clocks

AA5 FM2

Y6 FM3

AA6 FM4

Y4 FM

Memory to register clock

B2 FL1

Readout register clocks

A2 FL2

A3 FL3

B3 FL4

B1 FL5

A1 FL6

A9 VDD1

Output amplifier drain supply

A8 VDD2

B10 VS1

Output amplifier source

supply

B8 VS2

B7 VDP

Protection drain bias

A6 VGS

A10 VOS1

Video outputs

B9 VOS2

B4 FR

Reset clock

Y7 FA

Antiblooming gate clock

A7 VDR

Reset bias

AA7 VA

Antiblooming diode bias

A4, A5, B5, B6 VSS

Substrate bias

Y8, AA4, AA8 VSS

AA1, AA2 PELTIER+

OPTIONAL

Peltier cooler power supply

NC otherwise

Y1, Y2 PELTIER -

Y3 PT+

OPTIONAL

Temperature sensor

Pt 100W DIN43760

NC otherwise

AA3 PT-

Figure 1 : TH7888A organization

Summary of content (16 pages)

PAGE 1
TH7888A AREA ARRAY CCD IMAGE SENSOR 1024 × 1024 PIXELS WITH ANTIBLOOMING n n n n n n n n n n n 1024 x 1024 pixels with memory zone Up to 30 images / second Built-in antiblooming device providing an electronic shutter function.
PAGE 2
TH7888A DESCRIPTION TH7888A is especially designed for high data rate applications (up to 30 pict /s in 1024x1024 format progressive scan) in medical and industrial fields. This area array image sensor consists of a 1024 x 1024 pixels (14 mm x 14 mm) image zone associated to a memory zone (masked with optical shield). In order to increase data rate, it is provided 2 separate outputs that can be used for parallel readout.
PAGE 3
TH7888A GEOMETRICAL CHARACTERISTICS Figure 2b : Pixel layout Figure 2c : Cross-section AA’ ABSOLUTE MAXIMUM RATINGS Storage temperature ............................................................................................................................................-55°C to +150°C Operating temperature...........................................................................................................................................-40°C to +85°C Thermal cycling .........................
PAGE 4
TH7888A PELTIER OPTION Storage temperature ..............................................................................................................................................-55°C to +85°C Operating temperature...........................................................................................................................................-40°C to +70°C Thermal cycling ........................................................................................................................
PAGE 5
TH7888A TIMING DIAGRAMS Readout Mode The serial readout register is operated in a two phase transfer mode. However, there are provided 6 separated command electrodes that shall be connected differently depending on the required readout mode.
PAGE 6
TH7888A 1 : 12 Inactive pre-scan elements 2 : 1 isolation element 2 : 16 dark ref pixels 2 : 5 isolation elements 3 3 2 3 : : : : 1024 useful video pixels (single output readout mode) 512 useful video pixels (dual output readout mode) Figure 4 : Line timing diagram Figure 5 : Vertical transfer during Image to memory zone transfer 6/16
PAGE 7
TH7888A Figure 6 : Transfer period from image zone to memory zone (FP and FM) for 1.25 MHz vertical transfer frequency (Fv = 1 / Tv ). t1 = 7 ns typ. t2 = 5 ns typ. td = 8 ns typical delay time Figure 7 : Output diagram for readout register and reset clock 20 MHz applications. Cross over of complementary clocks (F L1, F L2) Figure 7 : between 30% and 70 % of max. amplitude.
PAGE 8
TH7888A BINNING MODE OPERATION In this mode, the image is composed of 512 x 512 pixels (28 mm x 28 mm each). Fall times & rise times : see fig. 6& 7 Figure 8 : Summation in the readout register of 2 adjacent lines. Figure 9 : Summation of 2 adjacent pixels In binning mode operation, maximum level of elementary pixel (14 x 14 mm) is reduced to Vsat / 4.
PAGE 9
TH7888A EXPOSURE TIME REDUCTION TH7888A allows exposure time control (electronic shutter function). The exposure time reduction is achieved by pulsing all the FPi gates to 0 volt so as to remove continuously all the photogenerated electrons through antiblooming drain VA. Fall times & rise times : see fig. 5 & 6 Figure 10 : Timing diagram for electronic shutter TABLE 2 - DRIVE CLOCK CHARACTERISTICS Parameter Symbol Value Unit Remarks 8.5 0.8 V V Typical input capacitance 15 nF See figure 11 8 0.
PAGE 10
TH7888A Figure 11 : Drive clocks capacitance network TABLE 3 - STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL VALUE Min. Output amplifier supply current Output impedance DC output level Output conversion factor 10/16 IDD TYP. 200 CVF 5.5 225 250 11 6 REMARKS mA per amplifier Max. 10 Zs VREF UNIT W V 6.
PAGE 11
TH7888A ELECTROOPTICAL PERFORMANCE • General conditions : Temp = 25°C (package back temperature) Light source : 2854K with 2 mm BG38 filter (unless specified) + F/3.5 optical aperture . 30 images per second mode (unless specified) Typical operating conditions. • Readout mode : 2 outputs • Values exclude dummy elements and blemishes. PARAMETER Output register saturation level SYMBOL VALUE Min. TYP. UNIT Max. VSAT reg 2.3 2.6 Pixel saturation level VSAT 1.6 1.9 2.
PAGE 12
TH7888A Figure 12 : Saturation level by full well with antiblooming out (FA high = 0 volt) vs the vertical transfer frequency.
PAGE 13
TH7888A Quantum Efficiency Figure 15 : Spectral response. IMAGE QUALITY GRADE Blemish Max area of 2 x 2 defective pixels Clusters Less than 7 contiguous defects in a column Columns More than 7 contiguous defects in a column General conditions Room temperature ..................................................................................................................................................................25°C Frequency ........................................................................
PAGE 14
TH7888A PACKAGE OUTLINE DRAWING (standard) * * * Legend All values are in mm. 1 2 3 4 5 6 7 : : : : : : : black alumina 40 pins PGA package black optical mask 400nm - 700 nm AR coated window (R<1 % per side) Metal back, (CuW - copper tungsten) gold plated. Electrically grounded (VSS). Optical center. first useful pixel (readout through VOS1) mechanical reference 14/16 Ø3.04 ±0.04 0.5 Mechanical distance Optical distance Ztop 2.82 ±0.31 2.31 ±0.29 Zbottom 1.68 ±0.15 2.19 ±0.
PAGE 15
TH7888A PACKAGE OUTLINE DRAWING (Peltier option) * * * Legend All values are in mm. 1 2 3 4 5 6 7 8 : : : : : : : : black alumina 40 pins PGA package black optical mask 400nm - 700 nm AR coated window (R<1 % per side) Metal part with integrated Peltier element. Metal back, (CuW - copper tungsten) gold plated. Electrically grounded (VSS). Optical center. first useful pixel (readout through VOS1) mechanical reference Ø3H8 0.5 Mechanical distance Optical distance Ztop 2.98 ±0.68 2.48 ±0.
PAGE 16
This product is manufactured by THOMSON-CSF SEMICONDUCTEURS SPECIFIQUES - 38521 SAINT-EGREVE / FRANCE. For further information please contact : THOMSON-CSF SEMICONDUCTEURS SPECIFIQUES - Route Départementale 128 - B.P. 46 - 91401 ORSAY Cedex / FRANCE - Tél. : (33)(0) 1.69.33.03.24 / Téléfax : (33)(0) 1.69.33.03.21. E-mail : monique.lafrique@tcs.thomson-csf.com - Internet : http://www.tcs.thomson-csf.com 16/16 ORDER CODE : DSTH7888AT/1199 Information furnished is believed to be accurate and reliable.