VISHAY
IL300
Document Number 83622
Rev. 1.3, 26-Apr-04
Vishay Semiconductors
www.vishay.com
1
i179026
A
CNC
NC
C
AA
C
1
2
3
4
8
7
6
5
K2
K1
Linear Optocoupler, High Gain Stability, Wide Bandwidth
Features
• Couples AC and DC signals
• 0.01 % Servo Linearity
• Wide Bandwidth, > 200 kHz
• High Gain Stability, ± 0.05 %/ °C
• Low Input-Output Capacitance
• Low Power Consumption, < 15 mW
• Isolation Test Voltage, 5300 VRMS, 1.0 sec.
• Internal Insulation Distance, > 0.4 mm for VDE
Agency Approvals
• UL File #E52744
• DIN EN 60747-5-2(VDE0884)
DIN EN 60747-5-5 pending
Available with Option 1, Add -X001 Suffix
Applications
Power Supply Feedback Voltage/Current
Medical Sensor Isolation
Audio Signal Interfacing
Isolated 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 (IP1) that
can be used to servo the LED drive current. This tech-
nique compensates for the LED’s non-linear, time,
and temperature characteristics. The output PIN pho-
todiode produces an output signal (IP2) that is linearly
related to the servo optical flux created by the LED.
The time and temperature stability of the input-output
coupler gain (K3) is insured by using matched PIN
photodiodes that accurately track the output flux of
the LED.
Order Information
For additional information on the available options refer to
Option Information.
Part Remarks
IL300 K3 = 0.557 - 1.618, DIP-8
IL300-DEFG K3 = 0.765 - 1.181, DIP-8
IL300-EF K3 = 0.851 - 1.061, DIP-8
IL300-E K3 = 0.851 - 0.955, DIP-8
IL300-F K3 = 0.945 - 1.061, DIP-8
IL300-X006 K3 = 0.557 - 1.618, DIP-8 400mil (option 6)
IL300-X007 K3 = 0.557 - 1.618, SMD-8 (option 7)
IL300-X009 K3 = 0.557 - 1.618, SMD-8 (option 9)
IL300-DEFG-X006 K3 = 0.765 - 1.181, DIP-8 400 mil (option 6)
IL300-DEFG-X007 K3 = 0.765 - 1.181, SMD-8 (option 7)
IL300-DEFG-X009 K3 = 0.765 - 1.181, SMD-8 (option 9)
IL300-EF-X006 K3 = 0.851 - 1.061, DIP-8 400 mil (option 6)
IL300-EF-X007 K3 = 0.851 - 1.061, SMD-8 (option 7)
IL300-EF-X009 K3 = 0.851 - 1.061, SMD-8 (option 9)
IL300-E-X006 K3 = 0.851 - 0.955, DIP-8 400 mil (option 6)
IL300-E-X007 K3 = 0.851 - 0.955, SMD-8 (option 7)
IL300-E-X009 K3 = 0.851 - 0.955, SMD-8 (option 9)
IL300-F-X006 K3 = 0.945 - 1.061, DIP-8 400 mil (option 6)
IL300-F-X007 K3 = 0.945 - 1.061, SMD-8 (option 7)
IL300-F-X009 K3 = 0.945 - 1.061, SMD-8 (option 9)
www.vishay.com
2
Document Number 83622
Rev. 1.3, 26-Apr-04
VISHAY
IL300
Vishay Semiconductors
Operation Description
A typical application circuit (Figure 1) uses an opera-
tional amplifier at the circuit input to drive the LED.
The feedback photodiode sources current to R1 con-
nected to the inverting input of U1. The photocurrent,
IP1, will be of a magnitude to satisfy the relationship of
(IP1 = VIN/R1).
The magnitude of this current is directly proportional
to the feedback transfer gain (K1) times the LED drive
current ( VIN/R1 = K1 • IF). The op-amp will supply
LED current to force sufficient photocurrent to keep
the node voltage (Vb) equal to Va.
The output photodiode is connected to a non-invert-
ing voltage follower amplifier. The photodiode load
resistor, R2, performs the current to voltage conver-
sion. The output amplifier voltage is the product of the
output forward gain (K2) times the LED current and
photodiode load, R2 ( VO = IF • K2 • R2).
Therefore, the overall transfer gain (VO/VIN) becomes
the ratio of the product of the 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
VO/VIN=(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 output 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
VO/VIN = K3 (R2/R1).
K1-Servo Gain
The ratio of the input photodiode current (IP1) to the
LED current (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 func-
tion 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 out-
put 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 pho-
tovoltaic 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
dependent upon the load resistor and the incident
LED optical flux. When operated in the photoconduc-
tive mode the diode is connected to a bias supply
which reverse biases the silicon diode. The magni-
tude 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 µA to 40 mA. Best linearity can be obtained at
drive currents between 5.0 mA to 20 mA. Its output
flux typically changes by - 0.5 % /°C over the above
operational current range.
Application Circuit
Fig. 1 Typical Application Circuit
iil300_01
8
7
6
5
K1
1
2
3
4
K2
R1 R2
IL300
Vb
Va +
-
U1
Vin
lp 1
-
U2
+
lp 2
Vout
VCC
VCC
VCC
VCC
IF
Vc
+
VISHAY
IL300
Document Number 83622
Rev. 1.3, 26-Apr-04
Vishay Semiconductors
www.vishay.com
3
Absolute Maximum Ratings
Tamb = 25 °C, unless otherwise specified
Stresses in excess of the absolute Maximum Ratings can cause permanent damage to the device. Functional operation of the device is
not implied at these or any other conditions in excess of those given in the operational sections of this document. Exposure to absolute
Maximum Rating for extended periods of the time can adversely affect reliability.
Input
Output
Coupler
Parameter Test condition Symbol Value Unit
Power dissipation Pdiss 160 mW
Derate linearly from 25 °C 2.13 mW/°C
Forward current IF60 mA
Surge current (pulse width < 10 µs) IPK 250 mA
Reverse voltage VR5.0 V
Thermal resistance Rth 470 K/W
Junction temperature Tj100 °C
Parameter Test condition Symbol Value Unit
Power dissipation Pdiss 50 mA
Derate linearly from 25 °C 0.65 mW/°C
Reverse voltage VR50 V
Junction temperature Tj100 °C
Thermal resistance Rth 1500 K/W
Parameter Test condition Symbol Value Unit
Total package dissipation at
25 °C
Ptot 210 mW
Derate linearly from 25 °C 2.8 mW/°C
Storage temperature Tstg - 55 to + 150 °C
Operating temperature Tamb - 55 to + 100 °C
Isolation test voltage > 5300 VRMS
Isolation resistance VIO = 500 V, Tamb = 25 °C RIO > 1012 Ω
VIO = 500 V, Tamb = 100 °C RIO > 1011 Ω
www.vishay.com
4
Document Number 83622
Rev. 1.3, 26-Apr-04
VISHAY
IL300
Vishay Semiconductors
Electrical Characteristics
Tamb = 25 °C, unless otherwise specified
Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are the result of engineering
evaluation. Typical values are for information only and are not part of the testing requirements.
Input
LED Emitter
Output
Parameter Test condition Symbol Min Ty p. Max Unit
Forward voltage IF = 10 mA VF1.25 1.50 V
VF Temperature coefficient ∆VF/∆°C - 2.2 mV/°C
Reverse current VR = 5 V IR1.0 µA
Junction capacitance VF = 0 V, f = 1.0 MHz Cj15 pF
Dynamic resistance IF = 10 mA ∆VF/∆IF6.0 Ω
Parameter Test condition Symbol Min Ty p. Max Unit
Dark current Vdet = -15 V, IF = 0 µsI
D1.0 25 nA
Open circuit voltage IF = 10 mA VD500 mV
Short circuit current IF = 10 mA ISC 70 µA
Junction capacitance VF = 0, f = 1.0 MHz Cj12 pF
Noise equivalent power Vdet = 15 V NEP 4 x 1014 W/√Hz
VISHAY
IL300
Document Number 83622
Rev. 1.3, 26-Apr-04
Vishay Semiconductors
www.vishay.com
5
Coupler
1. Bin Sorting:
K3 (transfer gain) is sorted into bins that are ± 6 % , 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, Vdet = - 15 V.
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.
Switching Characteristics
Parameter Test condition Symbol Min Typ. Max Unit
Input- output capacitance VF = 0 V, f = 1.0 MHz 1.0 pF
K1, Servo gain (IP1/IF)I
F = 10 mA, Vdet = - 15 V K1 0.0050 0.007 0.011
Servo current, see Note 1,2 IF = 10 mA, Vdet = - 15 V IP1 70 µA
K2, Forward gain (IP2/IF)I
F = 10 mA, Vdet = - 15 V K2 0.0036 0.007 0.011
Forward current IF = 10 mA, Vdet = - 15 V IP2 70 µA
K3, Transfer gain (K2/K1) see
Note 1,2
IF = 10 mA, Vdet = - 15 V K3 0.56 1.00 1.65 K2/K1
Transfer gain linearity IF = 1.0 to 10 mA ∆K3 ± 0.25 %
IF = 1.0 to 10 mA,
Tamb = 0 °C to 75 °C
± 0.5 %
Photoconductive Operation
Frequency response IFq = 10 mA, MOD = ± 4.0 mA,
RL = 50 Ω
BW (-3 db) 200 KHz
Phase response at 200 kHz Vdet = - 15 V -45 Deg.
Parameter Test condition Symbol Min Typ. Max Unit
Switching time ∆IF = 2.0 mA, IFq = 10 mA tr1.0 µs
tf1.0 µs
Rise time tr1.75 µs
Fall time tf1.75 µs
www.vishay.com
6
Document Number 83622
Rev. 1.3, 26-Apr-04
VISHAY
IL300
Vishay Semiconductors
Common Mode Transient Immunity
Typical Characteristics (Tamb = 25 °C unless otherwise specified)
Parameter Test condition Symbol Min Ty p. Max Unit
Common mode capacitance VF = 0, f = 1. MHz CCM 0.5 pF
Common mode rejection ratio f = 60 Hz, RL = 2.2 KΩCMRR 130 dB
Fig. 2 LED Forward Current vs.Forward Voltage
Fig. 3 LED Forward Current vs.Forward Voltage
iil300_02
1.41.31.21.1
0
5
10
15
20
25
30
35
VF - LED Forward Voltage - V
IF - LED Current - mA
1.0
iil300_03
1.0 1.1 1.2 1.3 1.4
.1
1
10
100
VF - LED Forward Voltage - V
IF - LED Current - mA
Fig. 4 Servo Photocurrent vs. LED Current and Temperature
Fig. 5 Servo Photocurrent vs. LED Current and Temperature
iil300_04
0°C
25°C
50°C
75°C
VD=15V
.1 1 10 100
300
250
200
150
100
50
0
IF- LED Current - mA
IP1 - Servo Photocurrent - µA
iil300_05
.1 1 10 100
1000
100
10
1
IF- LED Current - mA
IP1 - Servo Photocurrent - µA
VD= –15 V
0°C
25°C
50°C
75°C
VISHAY
IL300
Document Number 83622
Rev. 1.3, 26-Apr-04
Vishay Semiconductors
www.vishay.com
7
Fig. 6 Normalized Servo Photocurrent vs. LED Current and
Temperature
Fig. 7 Normalized Servo Photocurrent vs. LED Current and
Temperature
Fig. 8 Servo Gain vs. LED Current and Temperature
iil300_06
0 5 10 15 20 25
3.0
2.5
2.0
1.5
1.0
0.5
0.0
IF- LED Current - mA
Normalized Photocurrent
Normalized to: IP1@ IF=10 mA,
TA=25°C
VD=–15 V
0°C
25°C
50°C
75°C
iil300_07
.1 1 10 100
10
1
.1
.01
IF- LED Current - mA
0°C
25°C
50°C
75°C
IP1 - Normalized Photocurrent
Normalized to: IP1@ IF=10 mA,
TA=25°C
VD=–15 V
iil300_08
.1 1 10 100
IF- LED Current - mA
NK1 - Normalized Servo Gain
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0°C
25°C
50°C
75°C
85°C
Fig. 9 Normalized Servo Gain vs. LED Current and Temperature
Fig. 10 Transfer Gain vs. LED Current and Temperature
Fig. 11 Normalized Transfer Gain vs. LED Current and
Temperature
iil300_09
.1110100
IF- LED Current - mA
NK1 - Normalized Servo Gain
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0°C
25°C
50°C
75°C
100°C
Normalized to:
IF= 10 mA, TA= 25°C
iil300_10
0 5 10 15 20 25
1.010
1.005
1.000
0.995
0.990
IF- LED Current - mA
K3 - Transfer Gain - (K2/K1)
0°C
25°C
50°C
75°C
iil300_11
0 5 10 15 20 25
1.010
1.005
1.000
0.995
0.990
IF- LED Current - mA
K3 - Transfer Gain - (K2/K1)
0°C
25°C
50°C
75°C
Normalized to:
IF=10mA,
TA= 25°C
www.vishay.com
8
Document Number 83622
Rev. 1.3, 26-Apr-04
VISHAY
IL300
Vishay Semiconductors
Application Considerations
In applications such as monitoring the output voltage
from a line powered switch mode power supply, mea-
suring bioelectric signals, interfacing to industrial
transducers, or making floating current measure-
ments, a galvanically isolated, DC coupled interface
is often essential. The IL300 can be used to construct
an amplifier that will meet these needs.
The IL300 eliminates the problems of gain nonlinear-
ity and drift induced by time and temperature, by mon-
itoring LED output flux.
A PIN photodiode on the input side is optically cou-
pled to the LED and produces a current directly pro-
portional to flux falling on it. This photocurrent, when
coupled to an amplifier, provides the servo signal that
controls the LED drive current.
The LED flux is also coupled to an output PIN photo-
diode. The output photodiode current can be directly
or amplified to satisfy the needs of succeeding cir-
cuits.
Isolated Feedback Amplifier
The IL300 was designed to be the central element of
DC coupled isolation amplifiers. Designing the IL300
into an amplifier that provides a feedback control sig-
nal for a line powered switch mode power is quite sim-
ple, as the following example will illustrate.
See Figure 17 for the basic structure of the switch
mode supply using the Infineon TDA4918 Push-Pull
Switched Power Supply Control Chip. Line isolation
and insulation is provided by the high frequency
transformer. The voltage monitor isolation will be pro-
vided by the IL300.
Fig. 12 Amplitude Response vs. Frequency
Fig. 13 Amplitude and Phase Response vs. Frequency
Fig. 14 Common-Mode Rejection
iil300_12
10410 510 6
5
0
-5
-10
-15
-20
F - Frequency - Hz
Amplitude Response - dB
RL=1.0 KΩˇ
RL=10 KΩˇ
IF=10 mA, Mod = ±2.0 mA (peak)
iil300_13
dB
PHASE
∅- Phase Response - °
103104105106107
5
0
-5
-10
-15
-20
45
0
-45
-90
-135
-180
F - Frequency - Hz
Amplitude Response - dB
IFq=10 mA
Mod= ±4.0 mA
TA=25°C
RL=50 Ω
iil300_14
10 100 1000 10000 100000 1000000
-130
-120
-110
-100
-90
-80
-70
-60
F - Frequency - Hz
CMRR - Rejection Ratio - dB
Fig. 15 Photodiode Junction Capacitance vs. Reverse Voltage
iil300_15
0
2
4
6
8
10
12
14
Voltage - Vdet
Capacitance - pF
0246810
VISHAY
IL300
Document Number 83622
Rev. 1.3, 26-Apr-04
Vishay Semiconductors
www.vishay.com
9
The isolated amplifier provides the PWM control sig-
nal which is derived from the output supply voltage.
Figure 16 more closely shows the basic function of
the amplifier.
The control amplifier consists of a voltage divider and
a non-inverting unity gain stage. The TDA4918 data
sheet indicates that an input to the control amplifier is
a high quality operational amplifier that typically
requires a +3.0 V signal. Given this information, the
amplifier circuit topology shown in Figure 18 is
selected.
The power supply voltage is scaled by R1 and R2 so
that there is + 3.0 V at the non-inverting input (Va) of
U1. This voltage is offset by the voltage developed by
photocurrent flowing through R3. This photocurrent is
developed by the optical flux
created by current flowing through the LED. Thus as
the scaled monitor voltage (Va) varies it will cause a
change in the LED current necessary to satisfy the dif-
ferential voltage needed across R3 at the inverting
input.
The first step in the design procedure is to select the
value of R3 given the LED quiescent current (IFq) and
the servo gain (K1). For this design, IFq = 12 mA. Fig-
ure 4 shows the servo photocurrent at IFq is found to
be 100 µA. With this data R3 can be calculated.
For best input offset compensation at U1, R2 will
equal R3. The value of R1 can easily be calculated
from the following.
The value of R5 depends upon the IL300 Transfer
Gain (K3). K3 is targeted to be a unit gain device,
however to minimize the part to part Transfer Gain
variation, Infineon offers K3 graded into ± 5 % bins.
R5 can determined using the following equation,
Or if a unity gain amplifier is being designed (VMON-
ITOR = VOUT, R1 = 0), the equation simplifies to:
Fig. 16 Isolated Control Amplifier
R3 = V
b
I
PI
=
3V
100
µ
A=30KΩ
17164
iil300_16
+
-
Voltage
Monitor
R1
R2
To Control
Input
ISO
AMP
+1
R1=R2
(
V
MONITOR
Va-1
)
17165
R5 = V
OUT
V
MONITOR
•
R3(R1 + R2)
R2K3 17166
R5 = R3
K3 17190
www.vishay.com
10
Document Number 83622
Rev. 1.3, 26-Apr-04
VISHAY
IL300
Vishay Semiconductors
Table 1. gives the value of R5 given the production K3
bins.
R5 Selection
Table 1.
iil300_17
SWITCH XFORMER
SWITCH
MODE
REGULATOR
TDA4918
ISOLATED
FEEDBACK
CONTROL
110/
220
MAIN
DC OUTPUT
AC/DC
RECTIFIER
AC/DC
RECTIFIER
Fig. 17 Switching Mode Power Supply
iil300_18
8
7
6
5
100 pF
4
3
1
2
8
6
7
K1
V
CC
V
CC
1
2
3
4
K2
V
CC
V
monitor
R1
20 KW
R2
30 KW
R3
30 KW
R4
100 W
V
out To
control
input
R5
30 KW
IL300
Vb
Va +
-
U1
LM201
Fig. 18 DC Coupled Power Supply Feedback Amplifier
Bins Min. Max. 3
Typ.
R5 Resistor
KΩ
1%
KΩ
A 0.560 0.623 0.59 50.85 51.1
B 0.623 0.693 0.66 45.45 45.3
C 0.693 0.769 0.73 41.1 41.2
D 0.769 0.855 0.81 37.04 37.4
E 0.855 0.950 0.93 32.26 32.4
F 0.950 1.056 1.00 30.00 30.0
G 1.056 1.175 1.11 27.03 27.0
H 1.175 1.304 1.24 24.19 24.0
I 1.304 1.449 1.37 21.90 22.0
J 1.449 1.610 1.53 19.61 19.4
VISHAY
IL300
Document Number 83622
Rev. 1.3, 26-Apr-04
Vishay Semiconductors
www.vishay.com
11
The last step in the design is selecting the LED cur-
rent limiting resistor (R4). The output of the opera-
tional amplifier is targeted to be 50 % of the VCC, or
2.5 V. With an LED quiescent current of 12 mA the
typical LED (VF) is 1.3 V. Given this and the opera-
tional output voltage, R4 can be calculated.
The circuit was constructed with an LM201 differential
operational amplifier using the resistors selected. The
amplifier was compensated with a 100 pF capacitor
connected between pins 1 and 8.
The DC transfer characteristics are shown in Figure
19. The amplifier was designed to have a gain of 0.6
and was measured to be 0.6036. Greater accuracy
can be achieved by adding a balancing circuit, and
potentiometer in the input divider, or at R5. The circuit
shows exceptionally good gain linearity with an RMS
error of only 0.0133 % over the input voltage range of
4.0 V - 6.0 V in a servo mode; see Figure 20.
The AC characteristics are also quite impressive
offering a - 3.0 dB bandwidth of 100 kHz, with a -45 °
phase shift at 80 kHz as shown in Figure 21.
The same procedure can be used to design isolation
amplifiers that accept bipolar signals referenced to
ground. These amplifiers circuit configurations are
shown in Figure 22. In order for the amplifier to
respond to a signal that swings above and below
ground, the LED must be pre biased from a separate
source by using a voltage reference source (Vref1). In
these designs, R3 can be determined by the following
equation.
Fig. 19 Transfer Gain
V
opamp
-V
F
I
Fq
=2.5 V - 1.3 V
12 mA = 100Ω
R4 =
17096
iil300_19
6.05.55.04.54.0
2.25
2.50
2.75
3.00
3.25
3.50
3.75
Vout - Output Voltage - V
Vout = 14.4 mV + 0.6036 x Vin
LM 201 Ta = 25°C
Fig. 20 Linearity Error vs. Input Voltage
Fig. 21 Amplitude and Phase Power Supply Control
iil300_20
6.05.55.04.54.0
-0.015
-0.010
-0.005
0.000
0.005
0.010
0.015
0.020
0.025
Vin - Input Voltage - V
Linearity Error - %
LM201
iil300_21
dB
PHASE
Phase Response - °
10310 410 5106
2
0
-2
-4
-6
-8
45
0
-45
-90
-135
-180
F - Frequency - Hz
Amplitude Response - dB
R3 = V
ref1
I
P1
=
V
ref1
K1I
Fq
17098
www.vishay.com
12
Document Number 83622
Rev. 1.3, 26-Apr-04
VISHAY
IL300
Vishay Semiconductors
Table 2. Optolinear amplifiers
These amplifiers provide either an inverting or non-
inverting transfer gain based upon the type of input
and output amplifier. Table 2 shows the various con-
figurations along with the specific transfer gain equa-
tions. The offset column refers to the calculation of the
output offset or Vref2 necessary to provide a zero volt-
age output for a zero voltage input. The non-inverting
input amplifier requires the use of a bipolar supply,
iil300_22
Vcc
20pF
4
1
2
3
4
8
7
6
5
+Vref2
R5
R6
7
2
4
3Vo
R4
R3
–Vref1
Vin
R1 R2
37
6
+
+Vcc
100 Ω
6
IL 300
2–Vcc
–Vcc
Vcc
–Vcc
+
Vcc
Vcc
20pF
4
1
2
3
4
8
7
6
5
+Vref2
7
2
4
3
Vout
R4
R3
+Vref1
Vin
R1 R2
37
6
+
+Vcc
100 Ω
6
2Vcc
Vcc
–Vcc
+
Vcc
–
–
Non-Inverting Input Non-Inverting Output
Inverting Input Inverting Output
IL 300
–
–
–Vcc
Fig. 22 Non-inverting and Inverting Amplifiers
Amplifier Input Output Gain Offset
Non-Inverting
Inverting
Inverting
Inverting
Inverting
Inverting
Non-Inverting Non-Inverting
Non-Inverting
Non-Inverting
V
OUT
V
IN =K3 R4 R2
R3 (R1 + R2)
V
OUT
V
IN =K3 R4 R2 (R5 + R6)
R3 R5 (R1 + R2)
V
OUT
V
IN =-K3R4R2(R5+R6)
R3 R5 (R1 + R2)
V
OUT
V
IN =K3 R4 R2
R3 (R1 + R2)
-
Vref2 =Vref1 R4 K3
R3
Vref2 =-V
ref1
R3 R6
R4 (R5 + R6) K3
Vref2 =Vref1
R3 R6
R4 (R5 + R6) K3
Vref2 =-V
ref1 R4 K3
R3
17189
VISHAY
IL300
Document Number 83622
Rev. 1.3, 26-Apr-04
Vishay Semiconductors
www.vishay.com
13
while the inverting input stage can be implemented
with single supply operational amplifiers that permit
operation close to ground.
For best results, place a buffer transistor between the
LED and output of the operational amplifier when a
CMOS opamp is used or the LED IFq drive is targeted
to operate beyond 15 mA. Finally the bandwidth is
influenced by the magnitude of the closed loop gain of
the input and output amplifiers. Best bandwidths
result when the amplifier gain is designed for unity.
Package Dimensions in Inches (mm)
i178010
ISO Method A
Pin 1 ID. .240 (6.096)
.260 (6.604)
3
4
.380 (9.652)
.400 (10.16)
10°
.300 Typ.
(7.62) Typ.
.021 (0.527)
.035 (0.889)
1
2
.280 (7.112)
.330 (8.382)
.016 (.406)
.020(.508 )
.130 (3.302)
.150 (3.810)
.040 (1.016)
.050 (1.270 )
.100 (2.540)
4°
.010 (0.254) REF.
.050 (1.270)
3°
9
.110 (2.794)
.130 (3.302)
.010 (0.254) REF.
6
5
8
7
.020 (0.508) REF.
.008 (0.203)
.012 (0.305)
min.
.315 (8.00)
.020 (.51)
.040 (1.02)
.300 (7.62)
ref.
.375 (9.53)
.395 (10.03)
.012 (.30) typ.
.0040 (.102)
.0098 (.249)
15° max.
Option 9
.014 (0.35)
.010 (0.25)
.400 (10.16)
.430 (10.92)
.307 (7.8)
.291 (7.4)
.407 (10.36)
.391 (9.96)
Option 6
.315 (8.0)
MIN.
.300 (7.62)
TYP.
.180 (4.6)
.160 (4.1)
.331 (8.4)
MIN.
.406 (10.3)
MAX.
.028 (0.7)
MIN.
Option 7
18450
www.vishay.com
14
Document Number 83622
Rev. 1.3, 26-Apr-04
VISHAY
IL300
Vishay Semiconductors
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and
operatingsystems with respect to their impact on the health and safety of our employees and the public, as
well as their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are
known as ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs
and forbid their use within the next ten years. Various national and international initiatives are pressing for an
earlier ban on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the
use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design
and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each
customer application by the customer. Should the buyer use Vishay Semiconductors products for any
unintended or unauthorized application, the buyer shall indemnify Vishay Semiconductors against all
claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal
damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
