Flat panel sensor C7942SK-05 is a digital X-ray image sensor newly developed as a key device for non-destructive inspection, radiography and
other real-time X-ray imaging applications requiring high resolution and high image quality.
Features
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Non-destructive inspection
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Radiography
Applications
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Energy range: 150 kVp Max.
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High quality image: 5.4 Mpixels
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Pixel size: 50 × 50 µm
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Digital output (12-bits)
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High-speed imaging:
2 frames/s (single binning)
9 frames/s (4 × 4 binning)
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Long life: 150 kVp, 6 M roentgen
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Wide dynamic range
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High cost performance
IMAGE SENSOR
Flat panel sensor
High reliability, 150 kV (X-ray tube voltage) proof
C7942SK-05
AMP ARRAY No. 1
VERTICAL SHIFT REGISTER
TIMING
PULSE
GENERATOR
OSCILLATOR
ExtTrgGrb
PIXEL NUMBER
Vsync
Hsync
Pclk
A/D
IntExt BINNING
(bin0, bin1)
EXTERNAL POWER SUPPLY
A.vdd, D.vdd, V (±7.5)
(not attached)
AMP ARRAY No. 8
PHOTODIODE
ARRAY
BUFFER
AMP
BUFFER
AMP
PROCESSING
AMP
PROCESSING
AMP
12
57600005759999
24002339
480047992401
FOP WITH GOS
SCINTILLATOR
(120 mm × 120 mm)
Note: Signals are read out in order of pixel number.
BIAS
GENERATOR
ExtTrgLemo
FIFO
A/D FIFO
VIDEO OUTPUT
(12 BIT DIGITAL)
KACCC0284EB
1
■ Block diagram
C7942SK-05 is a compact flat panel sensor consisting of a sensor board and a control board. The sensor board also has 8
charge-sensitive amplifier arrays each having 300 ch amplifiers with a horizontal shift register. Analog video signals are amplified
as the charge on each video line by 2400 ch charge amplifiers with CDS (Correlated Double Sampling) circuits added, and are
output each of 8 amplifier arrays. The control board converts the analog video signal into a 12-bit digital signal and outputs it to
an external frame grabber through the 12-bit parallel port.
Flat panel sensor
C7942SK-05
■ Functional specification
Parameter Specification Unit
Pixel size 50 × 50 µm
Photodiode area 120 × 120 mm
Number of pixels 2400 × 2400 pixels
Number of active pixels 2316 × 2316 pixels
Readout Charge amplifier array -
Video output (Data1 - 12) RS-422 (differential) 12-bit -
Output data rate 15.15 MHz
Synchronous signal (Vsync, Hsync, Pclk) RS-422 (differential) -
bin0/1,
ExtTrgGrb, ExtTrgLemo, IntExt TTL -
Scintillator GOS -
■ Absolute maximum ratings (Ta=25 °C)
Parameter Symbol Value Unit
Supply voltage for digital circuitry (+5 V) D.vdd +6.0 V
Supply voltage for analog circuitry (+5 V) A.vdd +6.0 V
Supply voltage for analog circuitry (±7.5 V) V(±7.5) ±12 V
Input voltage (bin0/1, ExtTrgGrb, ExtTrgLemo, IntExt)
Vin 0 to 6.0 V
Operating temperature *1Topr 0 to +35 °C
Storage temperature *1Ts t g 0 to +50 °C
*1: No condensation
■ Specification (Ta=25 °C, A.vdd= 5.0 V, D.vdd= 5.0 V, V (±7.5)= ±7.5 V)
Parameter Symbol Min. Typ. Max. Unit
Frame rate (single operation) Sf (int) 1.9 2 - frames/s
Frame rate (2 × 2 binning) - - 4 - frames/s
Frame rate (4 × 4 binning) - - 9 - frames/s
Frame rate external (single operation) Sf (ext) -Sf (int) to 0.2 -frames/s
Noise (rms) *2N (rms) - 1300 - electrons
Sensitivity *3S46.4 58 -LSB/mR
Saturation charge Csat -1.1 -M electrons
Resolution *4Reso 7.1 8 - line pairs/mm
Dynamic range - - 850 - -
Defect line *5- - - 30 lines
Output offset *6- - 65 200 LSB
*2: Internal trigger mode, single operation
*3: At 150 kVp without filter
*4: Spatial frequency at CTF=5 %
*5: A defect line is a horizontal or vertical line containing 4 or more pixels that produce less than 1/8 of the average output from
surrounding pixels and are formed continuously from the opposite side of an amplifier array or a vertical shift register.
A couple of adjacent defect line should be 1 line pair Max.
*6: Average of all effective pixels in single operation at Sf (int)
Note: X-ray energy range is 20 k to 150 kVp.
2
■ Resolution
SPATIAL FREQUENCY (line pairs/mm)
CTF (%)
0
0
10
20
30
40
50
60
70
80
90
100
12345
(Ta=25 ˚C, A.vdd=5.0 V, D.vdd=5.0 V, V (±7.5 V) = ±7.5 V)
678910
KACCB0173EA
Flat panel sensor
C7942SK-05
3
■ Timing chart
To acquire images through an image grabber board, write parameters in the software program or parameter file by referring to
the following timing chart and description.
KACCC0362EA
1 FRAME
1st ROW 2nd ROW
He
ENLARGED VIEW
DUMMY LINES
Phe Pg Phe Phd PhdPhe
1st ROW
2nd ROW
1st ROW
2nd ROW
All pulses are counted in the
“High” period of Hsync+
All pulses are counted at the rising edge of Pclk+.
The effective video output is only included in the “Phe” period.
LAST ROW
Vsync+ (GRABBER)
Vsync+ (GRABBER)
Hsync+ (GRABBER)
Hsync+ (GRABBER)
Pclk+ (GRABBER)
Pulse
Parameter 1 × 1 2 × 2 4 × 4
Effective line 2344 1172 586
He Dummy line 56 28 14
Effective pixel 2240 1120 560
Phe Dummy pixel 160 80 40
Phd 526 1726 2326
Pg 21 21 21
Note: “He” is the Hsync count. Phe, Phd and Pg are the Pclk count.
KACCC0368EA
RECOMMENDATION: 50 % OF FRAME TIME
F rom Tmin to Tmax
Tvd
ExtTrgLemo
ExtTrgGrb
(TTL)
Vsync+
(RS-422)
Hsync+, Pclk+ and Data 1-12 are the same as internal trigger mode.
· Tmin is defined as 1/Sf (int).
· Tmax is defined as the reciprocal of the minimum value of Sf (ext).
· Tvd=390 µs
■ External trigger mode
To acquire images in e xternal trigger mode, input an e xternal trigger pulse as shown below. When the time Tvd has passed after
the rising edge of the external trigger pulse, synchronous signals and video signals are output.
Flat panel sensor
C7942SK-05
4
■ System requirements
To operate C7942SK-05 at full performance, the following system and per ipherals are required.
· PC: IBM compatible PC running on Windows XP or later operating system
· Digital frame grabber card: Monochrome 16 bits or more, pixel clock 16 MHz or more, RS-422 interface synchronous signal (See
the frame grabber manual.)
The National Instruments IMAQ PCI-1424 (NI parts No. 777662-01) frame grabber with optional memory 64 MB (NI parts No.
920130-64) has been verified to successfully acquire 12-bit digital images from C7942SK-05. You can utilize the demonstration
software that comes with the frame grabber as a simple viewer, to acquire and save an image. To do so, refer to the frame
grabber user’s guide for how to use the camera information file for the demonstration software.
· Power source: A.vdd = +5.0 ± 0.1 V (700 mA), D.vdd = +5.0 ± 0.1 V (1000 mA), V (±7.5) = ±7.5 ± 0.5 V (±100 mA)
Please use a series power supply. (Avoid using a switching power supply.) A power cable (terminated with an
FGG.2B.307.CLAD92Z plug at one end and open at the other end; 2 m; see Table 2.), an external trigger cable (terminated with
an FFA.OS .302.CLAC37 plug at one end and open at the other end; 5 m; see table 3.) and an earth cable (AWG 18; 4 m) comes
supplied with C7942SK-05. An optional frame grabber cable for interface with the 36-pin receptacle (see Table 1) on C7942SK-
05 is also available for synchronous signal, video output and external control.
The voltages described above are specified at the flat panel sensor side. The impedance of the power cable attached with the
flat panel sensor is low enough but it causes 0.1 V approx. drop. Therefore the voltage at the power source side should be set
0.1 V higher than the voltage specified above.
Install a noise filter on the AC power input line to prevent surges on the AC line.
To supply the synchronous signal through ExtTrgGrb, apply high level of TTL to ExtTrgLemo and IntExt, or leave them without
connection. On the contrary, to use ExtTrgLemo, set high level to ExtTrgGrb and IntExt, or leave them without connection. The
earth terminal must be connected to a stable earth point to eliminate noise from surroundings.
Table 1:
Pin assignment of 36-pin receptacle
Pin No. Signal Pin No. Signal
1 Data12+ (MSB) 19 Data12- (MSB)
2Data11+ 20 Data11-
3 Data10+ 21 Data10-
4Data9+ 22 Data9-
5 Data8+ 23 Data8-
6Data7+ 24 Data7-
7 Data6+ 25 Data6-
8Data5+ 26 Data5-
9 Data4+ 27 Data4-
10 Data3+ 28 Data3-
11 Data2+ 29 Data2-
12 Data1+(LSB) 30 Data1- (LSB)
13 bin0 (TTL) 31 GND
14 bin1 (TTL) 32 GND
15 ExtTrgGrb (TTL) 33 IntExt (TTL)
16 Vsync+ 34 Vsync-
17 Hsync+ 35 Hsync-
18 Pclk+ 36 Pclk-
Unless otherwise noted, signal level is RS-422.
36-pin receptacle: TX20A-36R-D2GF1-A1L made by JAE (Japan Aviation Electronics Industry, limited)
Mating plug: TX20A-36PH1-D2P1-D1E made by JAE (Japan Aviation Electronics Industry, limited)
Table 2:
Power pin assignment and cable color
Pin No. Color Signal
1 Brown +7.5 V
2Red Analog GND
3 Orange -7.5 V
4Yellow Analog GND
5 Green Analog +5 V
6Blue Digital GND
7 Purple Digital +5 V
Shield -Analog GND
7-pin power receptacle: ECG.2B.307.CLV made by LEMO S. A.
Mating power plug: FGG.2B.307.CLAD92Z made by LEMO S. A.
Table 3:
External trigger pin assignment and cable color
Pin No. Color Signal
1 Red ExtTrgLemo (TTL)
2Black Signal GND
Shield - Analog GND
2-pin receptacle: ECP.0S.302.CLL made by LEMO S. A
Mating plug: FFA.0S.302.CLAC37 made by LEMO S. A.
Flat panel sensor
C7942SK-05
5
■ Connection
Install the frame grabber board into the PC by the manufacturer’s instructions. When a general-purpose frame grabber board is
used, binning or trigger operation for bin0, bin1, IntExt and ExtTrgGrb can be controlled with its digital I/O control.
KACCC0285EB
VIDEO OUTPUT
(12 BIT DIGITAL)
Vsync, Hsync,
Pclk
BINNING
(bin0, bin1)
IntExt
ExtTrgGrb
X-RAY SOURCE
FRAME
GRABBER
MONITOR
PC/AT
(REAR VIEW) OS +
ACQUISITION
SOFTWARE
VOLTAGE
SOURCE
[A.vdd, D.vdd, V (±7.5)]
ExtTrgLemo
C7942SK-05
CMOS FLAT PANEL SENSOR C7942SK-05
■ Dimensional outline (unit: mm, tolerance: ±1 mm unless otherwise noted)
KACCA0156EF
Top cover is made of carbon fiber (1.0 mm thickness).
Weight: 5.0 kg * ±0.5
210 35
214
35.4
58.5
29.5 *165 *
5743
19.5
17.4
17.4
37
ACTIVE AREA 115.8
43.5
ACTIVE AREA 115.8
15.28
SCINTILLATOR TO
TOP COVER
8
CMOS FLAT PANEL SENSOR C7942SK-05
CMOS FLAT PANEL SENSOR C7942SK-05
EXT.TRG.
POWER
DIGITAL OUT
(2315, 2315)
(0, 0)
17 *176 *
17 *
176 *
(4 ×) M3 DEPTH 4
Flat panel sensor
C7942SK-05
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81) 53-434-3311, Fax: (81) 53-434-5184, www.hamamatsu.com
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658
France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions .
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2007 Hamamatsu Photonics K.K.
Cat. No. KACC1118E08
May 2007 DN
6
■ Optional frame grabber cables
Frame grabber Cable type No. Cable length Cable end Cable end
A8406-31 5 m
A8406-36 7 m
A8406-37 10 m
General-purpose
A8406-38 12 m
open
A8406-32 5 m
A8406-33 7 m
A8406-34 10 m
IMAQ PCI-1424 *7
A8406-35 12 m
TX20A-36PH1-D2P1-D1E *8
PCS-XE100MA+ *9
*7: Made by NI (National Instruments Corporation)
*8: Made by JAE (Japan Aviation Electronics Industry, Limited)
*9: Made by Honda Tsushin Kogyo Co. Ltd.
Note: The detailed information for these optional cable is shown in the datasheet of A8406 series.
■ Notice
· Do not subject the Flat Panel Sensors to strong vibration or shock. (Strong shock such as drop impacts may cause permanent
damage to these sensors.)
· Users must take responsibility for implementing X-ray shielding safety measures to avoid the risk of X-ray exposure.
· Data listed in this datasheet was measured at the time of shipment. Characteristics may vary somewhat due to exposure to X-
rays so take proper countermeasures such as making periodic image correction.
· This product is warranted for a period of 12 months after the date of the shipment.
The warranty is limited to make a replacement or repair of any defective product due to defects in workmanship or materials used
in manufacture. It does not cover loss or damage caused by natural disaster, misuse (including modifications and any use not
complying with the environment, application, usage and storage conditions described in this datasheet), or total radiation dose
over 6 million Roentgen (less than 150 kVp) even within the warranty period.
· As described above, flat panel sensors have limited resistance to radiation. This must be taken into account when using a flat
panel sensor under continuous irradiation (in-line non-destructive inspection, etc.)
When using flat panel sensors in non-destructive inspection equipment, please contact us and provide information such as
irradiation conditions.
C7942SK-05 conforms to European EMC directives:
EN61326 Class A.
