TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
1
www.taosinc.com
ac or dc Signal Coupling
Wide Bandwidth ...>200 kHz
High Transfer-Gain Stability...±0.005%/°C
3500 V Peak Isolation
Typical Applications
– Power-Supply Feedback
– Medical-Sensor Isolation
– Opto Direct-Access Arrangement (DAA)
– Isolated Process-Control Transducers
Description
The TIL300 precision linear optocoupler consists of an infrared LED irradiating an isolated feedback photodiode
and an output photodiode in a bifurcated arrangement. The feedback photodiode captures a percentage of the
flux of the LED that can be used to generate a control signal to regulate the LED drive current. This technique
is used to compensate for the nonlinear time and temperature characteristics of the LED. The output-side
photodiode then produces an output signal that is linearly proportional to the servo-optical flux emitted from the
LED.
A typical application circuit (shown in Figure 1) uses an operational amplifier as the input to drive the LED. The
feedback photodiode sources current through R1, which is connected to the inverting input of the input
operational amplifier. The photocurrent IP1 assumes a magnitude that satisfies the relationship IP1 = VI/R1. T h e
magnitude of the current is directly proportional to the LED current through the feedback transfer gain
K1(VI/R1 = K1 ×IF). The operational amplifier supplies LED current to produce sufficient photocurrent to keep
the node voltage Vb equal to node voltage Va.
_
+
+
–
IP2
2VCC+
2VCC–
VO = K3(R2/R1) VI
2VCC+
6
5
TIL300
1
2
3
4
R3
1VCC+
IF
1VCC–
1VCC+
P
R1
+
–
VI
K2
K1
IP1
Va
Vb
P
R2
NOTES: A. K1 is servo current gain, the ratio of the feedback servo photodiode current (IP1) to the input LED current (IF), i.e. K1 = IP1/IF.
B. K2 is forward gain, the ratio of the output photodiode current (IP2) to the input LED current (IF), i.e. K2 = IP2/IF.
C. K3 is transfer gain, the ratio of the forward gain to the servo gain, i.e. K3 = K2/K1.
Figure 1. Typical Application Circuit
The output photodiode is connected to a noninverting voltage follower; R2 is used to develop a voltage from
the photodiode current. The output of the amplifier is VO = K2IFR2. Overall transfer gain VO/VI becomes
VO/VI = (K2I FR2/K1IFR1). Factoring out the LED forward current IF and remembering that K2/K1 = K3, the
overall transfer gain becomes VO/VI = K3R2/R1. The overall transfer gain, therefore, is shown to be
independent of the LED current.
Copyright 2000, TAOS Inc.
Texas Advanced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205 Plano, TX 75074 (972) 673-0759
1
2
3
4
8
7
6
5
LEDK
LEDA
PDK1
PDA1
NC
NC
PDK2
PDA2
DCS OR P PACKAGE
(TOP VIEW)
NC – No internal connection
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
2
www.taosinc.com
Terminal Functions
TERMINAL
DESCRIPTION
NAME NO. DESCRIPTION
LEDK 1 LED cathode
LEDA 2 LED anode
PDK1 3 Photodiode 1 cathode
PDA1 4 Photodiode 1 anode
PDA2 5 Photodiode 2 anode
PDK2 6 Photodiode 2 cathode
NC 7 No internal connection
NC 8 No internal connection
Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)†
Emitter
Continuous total power dissipation (see Note 1) 160 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input LED forward current, IF 60 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Surge current with pulse duration < 10 µs 250 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reverse voltage, VR 5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reverse current, IR 10 µA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Detector
Continuous total power dissipation (see Note 2) 50 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reverse voltage, VR 50 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coupler
Continuous total power dissipation (see Note 3) 210 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg –55°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA –55°C to 100°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input-to-output voltage 3535 Vpeak. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may
affect device reliability.
NOTES: 1. Derate linearly from 25°C at a rate of 2.66 mW/°C.
2. Derate linearly from 25°C at a rate of 0.66 mW/°C.
3. Derate linearly from 25°C at a rate of 3.33 mW/°C.
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
3
www.taosinc.com
Electrical Characteristics at TA = 25°C (unless otherwise noted)
Emitter
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VFLED forward voltage IF = 10 mA 1.25 1.50 V
Temperature coefficient of VF–2.2 mV/°C
IRReverse current VR = 5 V 10 µA
trRise time IF = 10 mA, ∆IF = 2 mA 1 µs
tfFall time IF = 10 mA, ∆IF = 2 mA 1 µs
CjJunction capacitance VF = 0, f = 1 MHz 15 pF
Detector
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
IDK†Dark current VR = -15 V, IF = 0 25 nA
Open-circuit voltage IF = 10 mA 0.5 V
IOS Short-circuit current limit IF = 10 mA 80 µA
CjJunction capacitance VF = 0, f = 1 MHz 12 pF
Coupler, detector bias voltage, VR = –15 V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
K1†
Servo current gain
IF = 1 mA 0.3% 0.7% 1.5%
K1†Servo-current gain IF = 10 mA 0.5% 1.25% 2%
K2‡
Forward current gain
IF = 1 mA 0.3% 0.7% 1.5%
K2‡Forward current gain IF = 10 mA 0.5% 1.25% 2%
TIL300
IF = 1 mA 0.75 1 1.25
K3§
Transfer gain
TIL300 IF = 10 mA 0.75 1 1.25
K3§Transfer gain
TIL300A
IF = 1 mA 0.9 1 1.10
TIL300A IF = 10 mA 0.9 1 1.10
Gain temperature coefficient
K1/K2
I 10 mA
–0.5
%/°C
Gain temperature coefficient K3 IF = 10 mA ±0.005 %/°C
∆K3
Transfer gain linearity
IF = 1 to 10 mA ±0.25%
∆K3Transfer gain linearity IF = 1 to 10 mA, TA = 0 to 75°C±0.5%
BW Bandwidth IF = 10 mA,
IF(MODULATION) = ±2 mA RL = 1 kΩ,200 kHz
trRise time IF = 10 mA,
IF(MODULATION) = ±2 mA RL = 1 kΩ,1.75 µs
tfFall time IF = 10 mA,
IF(MODULATION) = ±2 mA RL = 1 kΩ,1.75 µs
Viso#Peak isolation voltage IIO = 10 µA, f = 60 Hz,
time = 1 minute 3535 V
†Servo-current gain (K1) is the ratio of the feedback photodiode current (IP1) to the input LED current (IF) current (IF), i.e. K1 = IP1/IF.
‡Forward gain (K2 is the ratio of the output photodiode current (IP2) to the input LED current (IF), i.e. K2 = IP2/IF.
§Transfer gain (K3) is the ratio of the forward gain to the servo-current gain, i.e. K3 = K2/K1.
Transfer gain linearity (∆K3) is the percent deviation of the transfer gain K3 as a function of LED input current (IF) or the package temperature.
#This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology.
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
4
www.taosinc.com
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
I
LED Forward Current
vs LED Forward Voltage 2
IFLED Forward Current vs LED Forward Voltage 3
I
Servo Photodiode Current
vs LED Forward Current and Temperature 4
Ip1 Servo Photodiode Current vs LED Forward Current and Temperature 5
I
Normalized Servo Photodiode Current
6
Ip1 Normalized Servo Photodiode Current vs LED Forward Current and Temperature 7
K1 Normalized Servo Current Gain vs LED Forward Current and Temperature 8
K3 Normalized Transfer Gain vs LED Forward Current 9
AOOutput Current Amplitude vs Frequency 10
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
5
www.taosinc.com
TYPICAL CHARACTERISTICS
Figure 2
15
10
5
01 1.1 1.2 1.3
– LED Forward Current – mA
20
25
LED FORWARD CURRENT
vs
LED FORWARD VOLTAGE
30
1.4 1.5 1.6
VF – LED Forward Voltage – V
TA = 25°C
IF
1
0.1 1 1.1 1.2 1.3 1.4
10
LED FORWARD CURRENT
vs
LED FORWARD VOLTAGE
100
1.5
VF – LED Forward Voltage – V
– LED Forward Current – mA
IF
TA = 25°C
1.6
Figure 3
250
200
100
00.1 1
350
450
SERVO PHOT ODIODE CURRENT
vs
LED FORWARD CURRENT AND TEMPERATURE
500
10 100
400
300
150
50
TA = 75°C
TA = 0°C
TA = 50°C
TA = 25°C
Servo Photodiode Current –
IF – LED Forward Current – mA
Ip1 –Aµ
Figure 4 Figure 5
0.1 0.2 0.4 0.7 1 2 4
200
SERVO PHOT ODIODE CURRENT
vs
LED FORWARD CURRENT AND TEMPERATURE
1000
10 40 701000
700
400
20
100
70
40
2
10
7
4
1720
T
A
= 75°C
TA = 0°C
TA = 50°C
TA = 25°C
IF – LED Forward Current – mA
Servo Photodiode Current –Ip1 –Aµ
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
6
www.taosinc.com
TYPICAL CHARACTERISTICS
2
1.5
0.5
00 5 10 15 20
2.5
3.5
NORMALIZED SERVO PHOTODIODE CURRENT
vs
LED FORWARD CURRENT AND TEMPERATURE
4
25 30
3
1
IF – LED Forward Current – mA
Normalized at
IF = 10 mA
TA = 25°C
VR = –15 V
TA = 75°C
TA = 0°C
TA = 25°C
TA = 50°C
Figure 6
Normalized Servo Photodiode CurrentIp1 –
Figure 7
Normalized at
IF = 10 mA
TA = 25°C
VR = –15 V
TA = 75°C
TA = 0°C
TA = 50°C
TA = 25°C
0.1
0.010.1
1
10
10 100
NORMALIZED SERVO PHOTODIODE CURRENT
vs
LED FORWARD CURRENT AND TEMPERATURE
IF – LED Forward Current – mA
1
Normalized Servo Photodiode CurrentIp1 –
0.8
0.4
0.2
00.1 1
K1 – Normalized Servo Current Gain
1
1.2
NORMALIZED SERVO CURRENT GAIN
vs
LED FORWARD CURRENT AND TEMPERATURE
1.4
10 100
0.6
IF – LED Forward Current – mA
Normalized at
IF = 10 mA
TA = 25°C
TA = 0°C
TA = 25°C
TA = 50°C
TA = 75°C
Figure 8 Figure 9
1
0.9
0.8
0.7 0 5 10 15 20
K3 – Normalized Transfer Gain – (K2/K1)
1.1
1.2
NORMALIZED TRANSFER GAIN
vs
LED FORWARD CURRENT
1.3
25 30
IF – LED Forward Current
Normalized at
IF = 10 mA
TA = 25°C
VR = –15 V
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
7
www.taosinc.com
TYPICAL CHARACTERISTICS
–10
–15
–20
–2510 20 40 70 100 200
– Output Current Amplitude – dB
–5
0
f – Frequency – kHz
OUTPUT CURRENT AMPLITUDE
vs
FREQUENCY
5
400 700 1000
AO
RL = 1 kΩ
RL = 10 kΩ
IF = 10 mA
MOD = ±2 mA (peak)
VR = 15 V
Figure 10
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
8
www.taosinc.com
MECHANICAL DATA
DCS (R-PDSO-G8) PLASTIC DUAL SMALL-OUTLINE OPTO COUPLER
4073327/B 01/98
Gage Plane
0.008 (0,20) NOM
0.030 (0,76) MIN
0.010 (0,25)
Seating Plane
5
0.260 (6,60)
0.055 (1,40)
0.045 (1,14)
4
0.240 (6,10)
8
1
0.370 (9,40)
0.390 (9,91)
0.092 (2,34) TYP
0.055 (1,40)
0.035 (0,89)
0.035 (0,89)
0.045 (1,14)
0.023 (0,58)
0.013 (0,33)
0.150 (3,81) MAX
0.020 (0,51) MAX
0.405 (10,29)
0.385 (9,78)
0.004 (0,10)
0.100 (2,54)
0°–5°
NOTES: A. All linear dimensions are in inches(millimeters).
B. This drawing is subject to change without notice.
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
9
www.taosinc.com
MECHANICAL DATA
P (R-PDIP-T8) PLASTIC DUAL-IN-LINE PACKAGE
4040082/B 03/95
0.310 (7,87)
0.290 (7,37)
0.010 (0,25) NOM
0.400 (10,60)
0.355 (9,02)
58
41
0.020 (0,51) MIN
0.070 (1,78) MAX
0.240 (6,10)
0.260 (6,60)
0.200 (5,08) MAX
0.125 (3,18) MIN
0.015 (0,38)
0.021 (0,53)
Seating Plane
M
0.010 (0,25)
0.100 (2,54) 0°–15°
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001
TIL300, TIL300A
PRECISION LINEAR OPTOCOUPLER
TAOS018 – AUGUST 1999
10
www.taosinc.com
PRODUCTION DATA — information in this document is current at publication date. Products conform to
specifications in accordance with the terms of Texas Advanced Optoelectronic Solutions, Inc. standard
warranty. Production processing does not necessarily include testing of all parameters.
NOTICE
Texas Advanced Optoelectronic Solutions, Inc. (TAOS) reserves the right to make changes to the products contained in this
document to improve performance or for any other purpose, or to discontinue them without notice. Customers are advised
to contact TAOS to obtain the latest product information before placing orders or designing TAOS products into systems.
TAOS assumes no responsibility for the use of any products or circuits described in this document or customer product
design, conveys no license, either expressed or implied, under any patent or other right, and makes no representation that
the circuits are free of patent infringement. TAOS further makes no claim as to the suitability of its products for any particular
purpose, nor does TAOS assume any liability arising out of the use of any product or circuit, and specifically disclaims any
and all liability, including without limitation consequential or incidental damages.
TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS, INC. PRODUCTS ARE NOT DESIGNED OR INTENDED FOR
USE IN CRITICAL APPLICATIONS IN WHICH THE FAILURE OR MALFUNCTION OF THE TAOS PRODUCT MAY
RESULT IN PERSONAL INJURY OR D E ATH. USE OF TAOS PRODUCTS IN LIFE SUPPORT SYSTEMS IS EXPRESSLY
UNAUTHORIZED AND ANY SUCH USE BY A CUSTOMER IS COMPLETELY AT THE CUSTOMER’S RISK.