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C7921

更新时间： 2024-09-23 23:39:19
品牌 Logo 应用领域
其他 - ETC 光电
页数 文件大小 规格书
7页 191K
描述
Optoelectronic

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中文翻译

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C7921 数据手册

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I M A G E S E N S O R  
Flat panel sensor  
C7921  
High resolution and high frame rate  
Flat panel sensor C7921 is a digital X-ray image sensor newly developed as key devices for non-destructive inspection, biomedical imaging, X-  
ray microscopy and other real-time X-ray imaging applications requiring high resolution and high image quality. C7921 consists of a sensor board  
and a control board, both assembled in a thin, flat and compact package. The sensor board contains a CsI scintillator plate, a two-dimensional  
photodiode array with FET switches and a signal processing IC chip. The photodiode array has a 1056 × 1056 pixel format with minimized  
blooming and is highly sensitive to bluish green light emitted from the CsI scintillator. Each row of pixels is addressed in sequence by the vertical  
shift register connected to the gate line.  
Light emission occurs when X-rays are absorbed in the CsI scintillator. This light emission enters directly into the two-dimensional photodiode  
array where an electric charge is stored in each pixel according to the light intensity. This charge is then transferred to the corresponding data line  
by applying a control signal to the vertical shift register.  
The sensor board also has 8 charge sensitive amplifier arrays each having 132 channel amplifiers with a horizontal shift register. These amplifiers  
with a total of 1056 channels are connected to a CDS (Correlated Double Sampling) circuit that senses the charge on each video line and sends it  
as the analog video signal from each amplifier array. The control board converts the analog video signal into a 12-bit digital signal and outputs it to  
an external frame grabber from a 12-bit parallel port.  
C7921 delivers a frame rate of 16 frames per second using 4 × 4 binning and is ideal for high frame rate applications, also ideal for applications  
requiring high resolution because of its 50 µm pixel size. Massive digital image data can easily be monitored on a display unit by using a frame  
grabber board and video memory installed in the PC. C7921 will prove ideal tools for real-time X-ray imaging and processing where easy-to-use,  
high-resolution X-ray digital image sensors are needed.  
Applications  
Features  
Non-destructive inspection  
Digital X-ray photography  
High quality image: 1056 × 1056 pixels  
Pixel size: 50 × 50 µm  
No image distortion  
Digital output (12 bits)  
High-speed imaging by binning operation:  
16 frames/s (4 × 4 binning)  
Wide dynamic range  
■ Block diagram  
High cost performance  
PIXEL NUMBER  
1
2
1055 1056  
2111 2112  
EXTERNAL POWER SUPPLY  
A. Vdd, D. Vdd V (±7.5)  
(not attached)  
1057  
SCINTILLATOR  
(52.8 mm × 52.8 mm)  
PHOTODIODE  
IntExt  
ARRAY  
BINNING  
(bin0, bin1)  
IntExt  
1115135 1115136  
AMP ARRAY No. 8  
OSCILLATOR  
TIMING  
PULSE  
GENERATOR  
AMP ARRAY No. 1  
ExtTrg  
Vsync  
Hsync  
Pclk  
BIAS  
GENERATER  
BUFFER  
AMP  
PROCESSING  
AMP  
A/D  
A/D  
FIFO  
FIFO  
VIDEO OUTPUT  
(12 BIT DIGITAL)  
BUFFER  
AMP  
PROCESSING  
AMP  
KACCC0170EA  
1
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