C7942CA-22 View Datasheet(PDF) - Hamamatsu Photonics
Part Name
Description
Manufacturer
C7942CA-22 Datasheet PDF : 8 Pages
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Flat panel sensor
C7942CA-22
Large photodiode area (120 × 120 mm)
The C7942CA-22 is a compact, lightweight digital X-ray image sensor developed as a key device for non-destructive inspection,
biochemical imaging, and X-ray microscopy. High-resolution, high-definition digital X-ray images can be acquired in real time.
Features
2400 × 2400 pixels
12-bit digital output
High-speed imaging: 2 frames/s (single operation)
9 frames/s (4 × 4 binning)
Low noise and wide dynamic range
Applications
Non-destructive inspection (off-line only)
Digital X-ray photography
Structure
The C7942CA-22 is comprised of a sensor board and a control board. Mounted on the sensor board is a CMOS image sensor chip made
up of a tow-dimensional photodiode array, row-scanning vertical shift register, and 8 charge amplifier arrays. Each charge amplifier array
has a horizontal shift register and consists of 300 ch charge amplifiers with CDS circuit.
A CsI scintillator plate is mounted on the two-dimensional photodiode array. X-rays incident on the scintillator are converted to
fluorescence, which then enters the two-dimensional photodiode array where electric charge is accumulated in each pixel according to
the light intensity. The accumulated charge on each row is sequentially selected by the row-scanning vertical shift register, transferred
to the amplifiers through the data line, and converted to a voltage signal. Then an analog signal is sent out from each amplifier array by
scanning the horizontal shift register.
The control board converts the analog signal into a 12-bit digital signal, which is then sent to a frame grabber board as a 12-bit parallel
output through one port.
PIXEL NUMBER
12
2401
2339 2400
4799 4800
SCINTILLATOR
(120 × 120 mm)
PHOTODIODE
ARRAY
EXTERNAL POWER SUPPLY
A.vdd, D.vdd, V (±7.5)
(not attached)
IntExt
BINNING
(bin0, bin1)
5759999 5760000
AMP ARRAY No. 1 AMP ARRAY No. 8
TIMING
PULSE
GENERATOR
BIAS
GENERATOR
BUFFER
AMP
PROCESSING
AMP
BUFFER
AMP
PROCESSING
AMP
OSCILLATOR
ExtTrgLemo
ExtTrgGrb
Vsync
Hsync
Pclk
A/D FIFO
A/D FIFO
VIDEO OUTPUT
(12 BIT DIGITAL)
Note: Signals are read out in order of pixel number.
KACCC0216EB
www.hamamatsu.com
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