IL300 datasheet(2/8 Pages) SIEMENS

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IL300

IL300 Terms

KI—Servo Gain

The ratio of the input photodiode current (IP1) to the LED cur-

rent(IF). i.e., K1 = IP1/ IF.

K2—Forward Gain

The ratio of the output photodiode current ( IP2) to the LED

current (IF), i.e., K2 = IP2/ IF.

K3—Transfer Gain

The Transfer Gain is the ratio of the Forward Gain to the Servo

gain, i.e., K3 = K2/K1.

∆K3—Transfer Gain Linearity

The percent deviation of the Transfer Gain, as a function of

LED or temperature from a speciﬁc Transfer Gain at a ﬁxed

LED current and temperature.

Photodiode

A silicon diode operating as a current source. The output cur-

rent is proportional to the incident optical ﬂux supplied by the

LED emitter. The diode is operated in the photovoltaic or pho-

toconductive mode. In the photovoltaic mode the diode func-

tions as a current source in parallel with a forward biased

silicon diode.

The magnitude of the output current and voltage is depen-

dant upon the load resistor and the incident LED optical ﬂux.

When operated in the photoconductive mode the diode is

connected to a bias supply which reverse biases the silicon

diode. The magnitude of the output current is directly propor-

tional to the LED incident optical ﬂux.

LED (Light Emitting Diode)

An infrared emitter constructed of AlGaAs that emits at 890

nm operates efﬁciently with drive current from 500

µA to 40

mA. Best linearity can be obtained at drive currents between

5 mA to 20 mA. Its output ﬂux typically changes by –0.5%/

°C

over the above operational current range.

Absolute Maximum Ratings

Symbol

Min.

Max.

Unit

Emitter

Power Dissipation

(TA=25°C)

PLED

160

Derate Linearly from 25

°C

2.13

mW/

°C

Forward Current

Surge Current

(Pulse width <10

µs)

lpk

250

Reverse Voltage

Thermal Resistance

Rth

470

°C/W

Junction Temperature

100

°C

Detector

Power Dissipation

PDET

Derate linearly from 25

°C

0.65

mW/

°C

Reverse Voltage

Junction Temperature

100

°C

Thermal Resistance

Rth

1500

°C/W

Coupler

Total Package

Dissipation at 25

°C

210

Derate linearly from 25

°C

2.8

mW/

°C

Storage Temperature

–55

150

°C

Operating Temperature

TOP

–55

100

°C

Isolation Test Voltage

5300

VACRMS

Isolation Resistance

VIO=500 V, TA=25°C

VIO=500 V, TA=100°C

Ω

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