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TMP007AIYZFT データシートの表示(PDF) - Texas Instruments

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TMP007AIYZFT Infrared Thermopile Sensor with Integrated Math Engine TI
Texas Instruments TI
TMP007AIYZFT Datasheet PDF : 55 Pages
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TMP007
SBOS685C – APRIL 2014 – REVISED JULY 2015
Feature Description (continued)
The intensity of radiation from the object is determined by the emisivity (ε), a material-dependent property that
scales the spectral response so that 0 < ε < 1. For an ideal black body, the radiation is at a maximum for a given
temperature and ε = 1. The temperature is measured on the Kelvin scale where 0 K is absolute zero, or
–273.15°C. Room temperature (25°C) is approximately 298.13 K. The emission spectra for objects at or near
room temperature are shown in Figure 17. For these temperatures, the majority of the radiation emitted is in the
wavelength range of 3 µm to 20 µm.
0.025
0.020
450 K
400 K
350 K
300 K
250 K
0.015
4 µm
16 µm
0.010
0.005
0.000
0
5
10
15
20
Wavelength (µm)
C019
Figure 17. Black Body Emission Spectrum and Response
7.3.1 Spectral Responsivity
The TMP007 is optimized to sense IR radiation emitted by objects from approximately 250 K (–23°C) to 400 K
(127°C), with maximum sensitivity from approximately 4 µm to 16 µm. The relative spectral response of the
TMP007 is shown in Figure 18.
1.2
1.0
0.8
0.6
0.4
0.2
0.0
4.0
8.0
12.0
Wavelength (µm)
16.0
C005
Figure 18. Relative Spectral Response vs Wavelength
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