iC-OD, iC-ODL

OPTICAL POSITION-SENSITIVE DETECTOR (PSD)

Rev D3, Page 7/9

TYPICAL CHARACTERISTICS

0

0

+1.25

−1.25

[mm]

IAC1

IAC2

1.0

0.5

position on PSD

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.

400

10

20

30

40

50

60

70

80

90

100

600

800

1000 nm

%

ext.

Filter

Figure 2: Relative spectral sensitivity

APPLICATIONS INFORMATION

CH1

CH2

CH1 0.5V/DIV

TIME 2US/DIV

CH2 0.5V/DIV

iC−OD/L OUTPUT

RL1= 10k, RL2= 10k

CH1 − CH2

CH1−CH2= 0V

CH1, CH2= 0V

Figure 3: The light spot impinges to the left

CH1

CH2

CH1 0.5V/DIV

TIME 2US/DIV

CH2 0.5V/DIV

iC−OD/L OUTPUT

RL1= 10k, RL2= 10k

CH1 − CH2

CH1−CH2= 0V

CH1, CH2= 0V

Figure 4: The light spot impinges in the center

CH2

CH1

CH1 0.5V/DIV

TIME 2US/DIV

CH2 0.5V/DIV

iC−OD/L OUTPUT

RL1= 10k, RL2= 10k

CH1 − CH2

CH1−CH2= 0V

CH1, CH2= 0V

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.