Siemens IL300 Datasheet

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IL300

LINEAR OPTOCOUPLER

FEATURES

Dimensions in inches (mm)

• Couples AC and DC signals

• 0.01% Servo Linearity

• Wide Bandwidth, >200 KHz

• High Gain Stability, ± 0.005%/C

• Low Input-Output Capacitance

• Low Power Consumption, < 15mw

• Isolation T est V oltage, 5300 VA C

RMS

1 sec.

• Internal Insulation Distance, >0.4
mm
for VDE

• Underwriters Lab File #E52744

• VDE Approval #0884 (Optional with
Option 1, Add -X001 Suffix)

• IL300G Replaced by IL300-X006

APPLICATIONS

• Power Supply Feedback Voltage/
Current

• Medical Sensor Isolation

34

268 (6.81)
255 (6.48)

,

4° Typ.

.022 (.56)
.018 (.46)

65

.390 (9.91)
.379 (9.63)

.045 (1.14)
.030 (.76)

.100 (2.54) Typ.

Pin One I.D.

12

87

.150 (3.81)
.130 (3.30)

.040 (1.02)
.030 (.76 )

1
2
3
4

.305 Typ.

(7.75) Typ.

10° Typ.

3°–9°
.012 (.30)

.008 (.20)

K2K1

8
7
6
5

.135 (3.43
.115 (2.92

• Audio Signal Interfacing

• Isolate Process Control Transducers

• Digital Telephone Isolation

DESCRIPTION

The IL300 Linear Optocoupler consists of
an AlGaAs IRLED irradiating an isolated
feedback and an output PIN photodiode
in a bifurcated arrangement. The feed­back photodiode captures a percentage
of the LED's flux and generates a control
signal (IP

) that can be used to servo the

1

LED drive current. This technique com­pensates for the LED's non-linear, time,
and temperature characteristics. The out­put PIN photodiode produces an output
signal (IP

) that is linearly related to the

2

servo optical flux created by the LED.
The time and temperature stability of the

input-output coupler gain (K3) is insured

DESCRIPTION (continued)

The magnitude of this current is directly proportional to the feedback transfer gain
(K1) times the LED drive current (V

/R1=K1 • I

IN

). The op-amp will supply LED cur-

F

rent to force sufficient photocurrent to keep the node voltage (Vb) equal to Va
The output photodiode is connected to a non-inverting voltage follower amplifier. The

photodiode load resistor, R2, performs the current to voltage conversion. The output
amplifier voltage is the product of the output forward gain (K2) times the LED current
and photodiode load, R2 (V

Therefore, the overall transfer gain (V

=I

• K2 • R2).

O

F

/V

) becomes the ratio of the product of the

O

IN

output forward gain (K2) times the photodiode load resistor (R2) to the product of the
feedback transfer gain (K1) times the input resistor (R1). This reduces to V

/V

=

O

IN

(K2 • R2)/(K1 • R1). The overall transfer gain is completely independent of the LED
forward current. The IL300 transfer gain (K3) is expressed as the ratio of the ouput
gain (K2) to the feedback gain (K1). This shows that the circuit gain becomes the
product of the IL300 transfer gain times the ratio of the output to input resistors [V
V

=K3 (R2/R1)].

IN

/

O

Figure 1. Typical application circuit

by using matched PIN photodiodes that
accurately track the output flux of the
LED.

A typical application circuit (Figure 1)
uses an operational amplifier at the circuit
input to drive the LED. The feedback
photodiode sources current to R1 con­nected to the inverting input of U1. The
photocurrent, IP1, will be of a magnitude
to satisfy the relationship of (IP1=V

/R1).

IN

+

Vin

R1

Va

Vb

U1

V

CC

I

F

lp 1

+

-

1

2

3

V

CC

4

K1

IL300

K2

8

7

6

5
lp 2

V

U2

CC

V

o

R2

-

c

+

V

CC

V

5–1

∆

IL300 Terms
KI—Servo Gain

The ratio of the input photodiode current (I
rent(I

). i.e., K1 = I

F

P1

/ I

.

F

) to the LED cur-

P1

K2—Forward Gain

The ratio of the output photodiode current ( I
current (I

), i.e., K2 = I

F

P2

/ I

.

F

) to the LED

P2

K3—Transfer Gain

The T ransfer Gain is the ratio of the Forwar d 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 cur­rent is proportional to the incident optical flux supplied by the
LED emitter. The diode is operated in the photovoltaic or pho­toconductive mode. In the photovoltaic mode the diode func­tions as a current source in parallel with a forward biased
silicon diode.

The magnitude of the output current and voltage is depen­dant 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 propor­tional 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 µ

A 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
(T

=25 ° C)

A

Derate Linearly from 25 ° C 2.13 mW/ ° C
Forward Current lf 60 mA
Surge Current

(Pulse width <10 µ s)
Reverse Voltage V
Thermal Resistance Rth 470 ° C/W
Junction Temperature T

Detector

Power Dissipation P
Derate linearly from 25 ° C

Reverse Voltage V
Junction Temperature T
Thermal Resistance Rth 1500 ° C/W

Coupler

Total Package
Dissipation at 25 ° C

Derate linearly from 25 ° C 2.8 mW/ ° C
Storage Temperature T
Operating Temperature T
Isolation Test Voltage 5300 VAC
Isolation Resistance

V

IO

V

IO

=500 V, T
=500 V, T

=25 ° C

A

=100 ° C

A

P

LED

160 mW

lpk 250 mA

R

J

DET

5V

100 ° C

50 mA

0.65 mW/ ° C

12
11

50 V
100 ° C

210 mW

Ω
Ω

R

J

P

T

S

OP

–55 150 ° C
–55 100 ° C

10
10

RMS

5–2

IL300

Characteristics

(T

=25 ° C)

A

Symbol Min. Typ. Max. Unit Test Condition

LED Emitter

Forward Voltage V
V

Temperature Coefficient

F

Reverse Current I
Junction Capacitance C
Dynamic Resistance
Switching Time t

F

∆ V

/ ∆° C -2.2 mV/ ° C

F

R

J

∆ V

/ ∆ I

F

F

R

t

F

1.25 1.50 V I

110

µ

AV
15 pF V
6
1

1

Ω
µ s

µ s

=10 mA

F

=5 V

R

=0 V, f=1 MHz

F

I

=10 mA

F

∆ I

=2 mA, I

F

∆ I

=2 mA, I

F

=10 mA

Fq

=10 mA

Fq

Detector

Dark Current I
Open Circuit Voltage V
Short Circuit Current I
Junction Capacitance C

D

D

SC

J

Noise Equivalent Power NEP 4 x 10

125nAV
500 mV I
70

µ AI

12 pF V

14

W/ √ Hz V

=-15 V, I

det

=10 mA

F

=10 mA

F

=0 V, f=1 MHz

F

=15 V

det

=0 µ A

F

Coupled Characteristics

K1, Servo Gain (I
Servo Current, see Note 1, 2 I
K2, Forward Gain (I
Forward Current IP270µAI
K3, Transfer Gain (K2/K1)

See Note 1, 2

/I

) K1 0.0050 0.007 0.011 I

P1

F

170

P

/I

) K2 0.0036 0.007 0.011 I

P2

F

K3 0.56 1.00 1.65 K2/K1 IF=10 mA, V

=10 mA, V

F

µ

AI

=10 mA, V

F

=10 mA, V

F

=10 mA, V

F

det

det

det

det

det

=-15 V
=-15 V
=-15 V
=-15 V
=-15 V

Transfer Gain Linearity ∆K3 ±0.25 % IF=1 to 10 mA
Transfer Gain Linearity ∆K3 ±0.5 % IF=1 to 10 mA, TA=0°C to 75°C

Photoconductive Operation

Frequency Response BW (-3 db) 200 KHz IFq=10 mA, MOD=±4 mA, RL=50 Ω,
Phase Response at 200 KHz -45 Deg. V
Rise Time t
Fall Time t

R

F

1.75 µs

1.75 µs

det

=-15 V

Package

Input-Output Capacitance C
Common Mode Capacitance C

IO

cm

Common Mode Rejection Ratio CMRR 130 dB f=60 Hz, R

Notes

1. Bin Sorting:
K3 (transfer gain) is sorted into bins that are ±5%, as follows:
Bin A=0.557–0.626

Bin B=0.620–0.696
Bin C=0.690–0.773
Bin D=0.765–0.859
Bin E=0.851–0.955
Bin F=0.945–1.061
Bin G=1.051–1.181
Bin H=1.169–1.311
Bin I=1.297–1.456
Bin J=1.442–1.618

K3=K2/K1. K3 is tested at IF=10 mA, V

=–15 V.

det

1pFV

=0 V, f=1 MHz

F

0.5 pF VF=0 V, f=1 MHz
=2.2 KΩ

L

2. Bin Categories: All IL300s are sorted into a K3 bin, indicated by an
alpha character that is marked on the part. The bins range from “A”
through “J”.

The IL300 is shipped in tubes of 50 each. Each tube contains only

one category of K3. The category of the parts in the tube is marked
on the tube label as well as on each individual part.

3. Category Options: Standard IL300 orders will be shipped from the
categories that are available at the time of the order. Any of the ten
categories may be shipped. For customers requiring a narrower
selection of bins, four different bin option parts are offered.

IL300-DEFG: Order this part number to receive categories D,E,F,G
only.

IL300-EF: Order this part number to receive categories E, F only.
IL300-E: Order this part number to receive category E only.
IL300-F: Order this part number to receive category F only

5–3

IL300