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TIL300, TIL300A PRECISION LINEAR OPTOCOUPLER
SOES019A - OCTOBER 1995 - REVISED JULY 1996
D D D D D D
ac or dc Signal Coupling Wide Bandwidth . . . > 200 kHz High Transfer-Gain Stability . . . 0.05%/C 3500 V Peak Isolation UL Approval Pending Applications - Power-Supply Feedback - Medical-Sensor Isolation - Opto Direct-Access Arrangement (DAA) - Isolated Process-Control Transducers
P PACKAGE (TOP VIEW)
LEDK LEDA PDK1 PDA1
1 2 3 4
8 7 6 5
NC NC PDK2 PDA2
NC - No internal connection
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 and generates a control signal that can be used 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 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. The magnitude of the current is directly proportional to the LED current through the feedback transfer gain K1(VI/R1 = K1 x IF). The operational amplifier supplies LED current to produce sufficient photocurrent to keep the node voltage Vb equal to node voltage Va.
TIL300 1 1VCC+ Va + VI - R1 IP1 Vb + _ 1VCC- R3 IF 1VCC+ 3 P 2 K1 6 2VCC+ 2VCC+ - 4 5 IP2 R2 + 2VCC- VO = K3(R2 / R1) VI K2
P
NOTES: A. K1 is servo current gain, the ratio of the feedback 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
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright (c) 1996, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
1
TIL300, TIL300A PRECISION LINEAR OPTOCOUPLER
SOES019A - OCTOBER 1995 - REVISED JULY 1996
Terminal Functions
TERMINAL NAME LEDK LEDA PDK1 PDA1 PDA2 PDK2 NC NC NO. 1 2 3 4 5 6 7 8 I/O LED cathode LED anode Photodiode 1 cathode Photodiode 1 anode Photodiode 2 anode Photodiode 2 cathode No internal connection No internal connection DESCRIPTION
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 width < 10 s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mA Reverse voltage, VR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 V Reverse current, IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 A Detector Continuous power dissipation (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mW Reverse voltage, VR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V Coupler Continuous total power dissipation (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 mW Storage temperature, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 150C Operating temperature, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 100C Input-to-output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3535 Vpeak Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260C
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 or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. Derate linearly from 25C at a rate of 2.66 mW/C. 2. Derate linearly from 25C at a rate of 0.66 mW/C. 3. Derate linearly from 25C at a rate of 3.33 mW/C.
2
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
TIL300, TIL300A PRECISION LINEAR OPTOCOUPLER
SOES019A - OCTOBER 1995 - REVISED JULY 1996
electrical characteristics at TA = 25C
Emitter
PARAMETER VF IR tr tf Cj Forward voltage Temperature coefficient of VF Reverse current Rise time Fall time Junction capacitance VR = 5 V IF = 10 mA, IF = 10 mA, VF = 0, IF = 2 mA IF = 2 mA f = 1 MHz IF = 10 mA CONDITIONS MIN TYP 1.25 -2.2 10 1 1 15 MAX 1.50 UNIT V mV/C A s s pF
Detector
PARAMETER IDK IOS Cj Dark current Open circuit voltage Short circuit current limit Junction capacitance VR = 15 V, IF = 10 mA IF = 10 mA VF = 0, CONDITIONS IF = 0 0.5 80 f = 1 MHz 12 MIN TYP MAX 25 UNIT nA V A pF
Coupler
PARAMETER K1 K2 Servo current gain Forward current gain Detector bias voltage = -15 V TIL300 K3 Transfer gain TIL300A Gain temperature coefficient K3# BW tr tf Viso Transfer gain linearity Bandwidth Rise time Fall time Peak Isolation voltage K1/K2 K3 IF = 10 mA IF = 1 to 10 mA IF = 1 to 10 mA, IF = 10 mA, IF(MODULATION) = 2 mA IF = 10 mA, IF(MODULATION) = 2 mA IF = 10 mA, IF(MODULATION) = 2 mA IIO = 10 A, time = 1 minute CONDITIONS IF = 1 mA IF = 10 mA IF = 1 mA IF = 10 mA IF = 1 mA IF = 10 mA IF = 1 mA IF = 10 mA MIN 0.3% 0.5% 0.3% 0.5% 0.75 0.75 0.9 0.9 TYP 0.7% 1.25% 0.7% 1.25% 1 1 1 1 - 0.5 0.005 0.25% TA = 0 to 75C RL = 1 k, RL = 1 k, RL = 1 k, f = 60 Hz 0.5% 200 1.75 1.75 3535 kHz s s V MAX 1.5% 2% 1.5% 2% 1.25 1.25 1.10 1.10 %/C UNIT
This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology. 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 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.
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
3
TIL300, TIL300A PRECISION LINEAR OPTOCOUPLER
SOES019A - OCTOBER 1995 - REVISED JULY 1996
MECHANICAL DATA
P (R-PDIP-T8)
0.400 (10,60) 0.355 (9,02) 8 5
PLASTIC DUAL-IN-LINE PACKAGE
0.260 (6,60) 0.240 (6,10)
1
4 0.070 (1,78) MAX 0.020 (0,51) MIN 0.310 (7,87) 0.290 (7,37)
0.200 (5,08) MAX Seating Plane 0.125 (3,18) MIN
0.100 (2,54) 0.021 (0,53) 0.015 (0,38) 0.010 (0,25) M 0.010 (0,25) NOM
0- 15
4040082 / B 03/95 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Falls within JEDEC MS-001
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POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
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Copyright (c) 1999, Texas Instruments Incorporated

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