GP1U78Q Просмотр технического описания (PDF) - Sharp Electronics

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GP1U78Q

IR Detecting Unit For Remote Control

Sharp Electronics 

GP1U78Q Series

s Performance

Using the transmitter shown in Fig. 1, the output signal of the light detecting unit is good enough

to meet the following items in the standard optical system in Fig. 2.

( 1) Linear reception distance characteristics

When L= 0.2 to 6.5m, Ee<10 lx and φ = 0˚ in Fig. 2, the output signal shall meet the electrical

characteristcs in the attached list.

( 2) Sensitivity angle reception distance characteristics

When L= 0.2 to 4.5m, Ee< 10 lx and φ <= 30˚ in Fig. 2, the output signal shalmeet the electrical

characteristics in the attached list.

( 3) Anti outer peripheral light reception distance characteristics

When L= 0.2 to 3m, Ee <= 300 lx and φ = 0˚ in Fig. 2, the output signal shall meet the electrical

characteristics in the attached list.

20cm

10k Ω

+ 5V

Transmitter (GL521 used )

Duty 50 %

Center frequency (fo)

depends on the attached

model list.

Fig. 1. Transmitter

Vout

Oscilloscope

In the above figure, the transmitter should be set so that the output V out can be 40mV PP .

However, the PD49PI to be used here should be of the short-circuit current I SC= 2.6 µ A at EV=

100 lx.

(EV is an illuminance by CIE standard light source A ( tungsten lamp ) .)

Transmitter

Reception distance : L

Light detector face

illuminance : Ee

φ

φ

Vout

( φ indicates horizontal and

vertical directions. )

Fig. 2. Standard optical system

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