iC-OD, iC-ODL
OPTICAL POSITION-SENSITIVE DETECTOR (PSD)
Rev D3, Page 7/9
TYPICAL CHARACTERISTICS
1.0
IAC1
relative AC photo current
IAC2
100
%
90
80
0.5
70
60
50
0
−1.25
0
position on PSD
+1.25 [mm]
40
30
20
10
400
600
ext.
Filter
800
1000 nm
Figure 1: Example for position sensing characteris-
tics
External filter (RG850) improves the suppression of
ambient light by a factor of ca. 20 to 30.
Figure 2: Relative spectral sensitivity
APPLICATIONS INFORMATION
CH1
iC−OD/L OUTPUT
RL1= 10k, RL2= 10k
CH2
iC−OD/L OUTPUT
RL1= 10k, RL2= 10k
CH2
CH1
CH1, CH2= 0V
CH1, CH2= 0V
CH1 − CH2
CH1 − CH2
CH1−CH2= 0V
CH1−CH2= 0V
CH1 0.5V/DIV
CH2 0.5V/DIV
TIME 2US/DIV
CH1 0.5V/DIV
CH2 0.5V/DIV
TIME 2US/DIV
Figure 3: The light spot impinges to the left
Figure 5: The light spot impinges to the right
Examples of output signals
The oscilloscope pictures show the signal patterns at
iC-OD outputs IAC1 and IAC2 when receiving a 5 µs
light pulse. The differential signal shown has been cal-
culated.
Both of the outputs are terminated with 10 kΩ. An ex-
ternal filter is not used.
CH1
iC−OD/L OUTPUT
RL1= 10k, RL2= 10k
CH2
CH1, CH2= 0V
CH1 − CH2
CH1−CH2= 0V
CH1 0.5V/DIV
CH2 0.5V/DIV
TIME 2US/DIV
Figure 4: The light spot impinges in the center
ICHAUS [ IC-HAUS GMBH ]
