Datasheet

IMX219PQH5-C
92
15. Notice on White Pixels Specifications
After shipment inspection of CMOS image sensors, pixels of CMOS image sensors may be distorted and then
distorted pixels may cause white point effects in dark signals in picture images. (Such white point effects
shall be hereinafter referred to as "White Pixels.") Cosmic radiation is one of the causes of White Pixels.
Unfortunately, it is not possible with current scientific technology for CMOS image sensors to prevent such
distorted pixels. It is recommended that when you use CMOS image sensors, you should consider taking
measures against White Pixels, such as adoption of automatic compensation systems for White Pixels and
establishment of quality assurance standards.
White Pixels may be also caused by alpha radiation, which will be emitted in a process of decay of radioactive
isotopes which inevitably exist in the air in minute amounts and may exist in materials or parts of CMOS image
sensor devices (e.g. packaging materials, seal glass, wiring materials and IC chips). It is recommended that
you should use materials or parts which do not include radioactive isotopes, which are sources of alpha
radiation, and consider taking measures, such as adoption of vacuum packaging technologies in order to
ensure that the PRODUCTS are not exposed to the air. As the density of radioactive isotopes in the air of the
underground space may become thicker than that on the ground, it is highly recommended to ensure the
PRODUCTS are not exposed to the air in using or storing the PRODUCTS at the underground space.
[For Your Reference] The Annual number of White Pixels Occurrence Caused by Cosmic Radiation
The data in the below chart shows the estimated annual number of White Pixels occurrence caused by cosmic
radiation in a single-story building in Tokyo at an altitude of 0 meters. The data shows estimated number of White
Pixels based on records of past field tests calculated taking structures and electrical properties of each device into
account. However, the data in the chart is for your reference purpose only, and shall not be construed as part of any
CMOS image sensor product specifications which the Seller warrants.
Example of Annual Number of Occurrence
0.8 pcs
0.5 pcs
0.3 pcs
0.2 pcs
0.1 pcs
10.0 mV or higher
24.0 mV or higher
50.0 mV or higher
72.0 mV or higher
Annual number of occurrence
White Pixel Level (in case of integration time = 1/30 s)
(Tj = 60 ˚C)
5.6 mV or higher
Note 1) The above data indicates the number of White Pixels occurrence when a CMOS image sensor is left
for a year.
Note 2) The annual number of White Pixels occurrence fluctuates depending on the CMOS image sensor storage
environment (such as altitude, geomagnetic latitude and building structure), time (solar activity effects)
and so on. Moreover, there may be statistic errors. Please take notice and understand that this is an
example of test data with experiments that have being conducted over a specific time period and in
a specific environment.
Note 3) This data does not guarantee the upper limits of the annual number of White Pixels occurrence.
Note 4) As this data does not take occurrence of White Pixels caused by alpha radiation into account, White
Pixels are likely to occur at higher value than the rate set forth in such data.
For Your Reference:
The annual number of White Pixels occurrence caused by cosmic radiation at an altitude of 3,000 meters will be
from 5 to 10 times higher than that at an altitude of 0 meters because of the density of the cosmic rays. In addition,
in high latitude geographical areas such as London and New York, the density of cosmic rays increases due
to a difference in the geomagnetic density, so the annual number of White Pixels occurrence caused by cosmic
radiation in such areas approximately doubles when compared with that in Tokyo.