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IBIS4-1300
Document Number: 38-05707 Rev. *B
Page 8 of 37
Figure 3. shows the spectral response characteristic. The
curve is measured directly on the pixels. It includes effects of
non-sensitive areas in the pixel, e.g. interconnection lines. The
sensor is light sensitive between 400 and 1000 nm. The peak
QE * FF is more than 30% between 500 and 700 nm. In view
of a fill factor of 60%, the QE is thus larger than 50% between
500 and 700 nm.
Figure 4. Near infrared spectral response
IBIS4 Near-IR spectral response
1.00E-03
1.00E-02
1.00E-01
1.00E+00
800
850
900
950
1000
1050
1100
Wavelength [nm]
10% QE
50% QE
plain diode
Pixel array
1% QE
calculation of sensitivity in [V/lx.s]
Pixel area A
49 E-12 m2
Fill factor FF
60%
Spectral response SR
0.22 A/W (average)
FF*SR
0.13 A/W (average over wavelength)
Pixel capacitance Ceff
5E-15 F
Sensitivity = FF*SR*Ceff/A
1.27E+3 [V.W/s.m2]
Conversion to lux: 1W/m2 =
About 180 lux, visible light only
About 70 lux, including Near Infrared
Sensitivity in lux units:
7.08 [V/lx.s] visible light only
18 [V/lx.s] if near IR included.
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