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CMV2000 데이터시트(PDF) 29 Page - ams-OSRAM AG

부품명 CMV2000
상세설명  CMV2000 Global shutter CMOS image sensor for machine vision
PDF  87 Pages
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제조업체  AMSOSRAM [ams-OSRAM AG]
홈페이지  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

CMV2000 데이터시트(HTML) 29 Page - ams-OSRAM AG

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CMV2000
Functional description
Datasheet
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7.2.5
Frame rate calculation
The frame rate is defined by 2 main factors:
Exposure time
Read-out time
To simplify the calculation we will assume that the exposure time is shorter than the read-out
time and that the sensor is operating at default settings, taking a full resolution 10-bit image at
48 MHz through 16 outputs. This means that the frame rate will be defined only by the read-out
time because the exposure time happens in parallel with the read-out. The read-out time is
defined by:
Output clock speed: Max 240 MHz
ADC mode: 10-bit or 12-bit
Number of lines read-out
Number of LVDS outputs used: Max 16 outputs
If any of these parameters is changed, it will have an impact on the frame rate. In default
operation this will result in 340 fps. The total read-out time is composed of two parts: FOT
(frame overhead time) and image read-out time.
The FOT is defined as shown in Equation 1:
Equation 1:
������������������ = (������������������_������������������������������ℎ + (2 ∗
16
#������������������������������������������ ������������������������
)) ∗ 129 ∗ ������������������������������������ ������������������������������ ������������������������������������
With fot_length (register 73) at its default value of 10, this results in 32.25 µs frame overhead
time.
The image read-out time is defined as shown in Equation 2:
Equation 2:
������������������������������ ������������������������ − ������������������ ������������������������ = (129 ∗ ������������������������������������ ������������������������������ ������������������������������������ ∗
16
#������������������������������������������ ������������������������
) ∗ ������������_������������������������������
Reading out a full resolution image, this results in 2.924 ms image read-out time.
The total read-out time is now the sum of the FOT and the image read-out time, which results
in 32.25 µs + 2.924 ms or 2.9525 ms to read out a single full resolution image. The frame rate
is thus 338 fps.
Table 7 gives some examples of how the frame rate increases when reading out a smaller
frame in 10-bit mode.



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