IL300 www.vishay.com Vishay Semiconductors Linear Optocoupler, High Gain Stability, Wide Bandwidth FEATURES Couples AC and DC signals C 1 8 NC 0.01 % servo linearity 7 A 2 NC K1 K2 Wide bandwidth, > 200 kHz 6 C 3 C High gain stability, 0.005 %/C typically A A 4 5 Low input-output capacitance i179026 2 Low power consumption, < 15 mW V DE Isolation test voltage, 5300 V , 1 s RMS i179026 Internal insulation distance, > 0.4 mm Material categorization: for definitions of compliance please see www.vishay.com/doc 99912 DESCRIPTION The IL300 linear optocoupler consists of an AlGaAs IRLED APPLICATIONS irradiating an isolated feedback and an output PIN Power supply feedback voltage/current photodiode in a bifurcated arrangement. The feedback photodiode captures a percentage of the LEDs flux and Medical sensor isolation generates a control signal (I ) that can be used to servo the P1 Audio signal interfacing LED drive current. This technique compensates for the Isolated process control transducers LEDs non-linear, time, and temperature characteristics. The output PIN photodiode produces an output signal (I ) Digital telephone isolation P2 that is linearly related to the servo optical flux created by the LED. AGENCY APPROVALS The time and temperature stability of the input-output UL file no. E52744, system code H coupler gain (K3) is insured by using matched PIN DIN EN 60747-5-5 (VDE 0884-5) available with option 1 photodiodes that accurately track the output flux of the LED. BSI FIMKO ORDERING INFORMATION DIP-8 Option 6 I L 300 - D E F G - X 0 T 10.16 mm 7.62 mm PART NUMBER K3 BIN PACKAGE OPTION TAPE AND Option 7 Option 9 REEL > 0.1 mm > 0.7 mm AGENCY CERTIFIED/ K3 BIN PACKAGE UL, cUL, 0.557 to 1.618 0.765 to 1.181 0.851 to 1.181 0.765 to 0.955 0.851 to 1.061 0.945 to 1.181 0.851 to 0.955 0.945 to 1.061 BSI, FIMKO DIP-8 IL300 IL300-DEFG - - IL300-EF - IL300-E IL300-F DIP-8, 400 mil, IL300-X006 IL300-DEFG-X006 - - IL300-EF-X006 IL300-FG-X006 IL300-E-X006 IL300-F-X006 option 6 (1) (1) (1) SMD-8, option 7 IL300-X007T IL300-DEFG-X007T IL300-EFG-X007 IL300-DE-X007T IL300-EF-X007T - IL300-E-X007T IL300-F-X007 (1) (1) (1) (1) SMD-8, option 9 IL300-X009T IL300-DEFG-X009T - - IL300-EF-X009T - - IL300-F-X009T VDE, UL, 0.557 to 1.618 0.765 to 1.181 0.851 to 1.181 0.765 to 0.955 0.851 to 1.061 0.945 to 1.181 0.851 to 0.955 0.945 to 1.061 BSI, FIMKO DIP-8 IL300-X001 IL300-DEFG-X001 - - IL300-EF-X001 - IL300-E-X001 IL300-F-X001 DIP-8, 400 mil, IL300-X016 IL300-DEFG-X016 - - IL300-EF-X016 - - IL300-F-X016 option 6 (1) (1) (1) SMD-8, option 7 IL300-X017 IL300-DEFG-X017T - - IL300-EF-X017T - IL300-E-X017T IL300-F-X017T (1) SMD-8, option 9 - - - - - - - IL300-F-X019T Note (1) Also available in tubes, do not put T on the end. Rev. 1.8, 02-Jun-14 Document Number: 83622 1 For technical questions, contact: optocoupleranswers vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000IL300 www.vishay.com Vishay Semiconductors OPERATION DESCRIPTION K3-TRANSFER FAIN LINEARITY A typical application circuit (figure 1) uses an operational The percent deviation of the transfer gain, as a function of amplifier at the circuit input to drive the LED. The feedback LED or temperature from a specific transfer gain at a fixed photodiode sources current to R1 connected to the inverting LED current and temperature. input of U1. The photocurrent, I , will be of a magnitude to P1 satisfy the relationship of (I = V /R1). PHOTODIODE P1 IN The magnitude of this current is directly proportional to the A silicon diode operating as a current source. The output feedback transfer gain (K1) times the LED drive current current is proportional to the incident optical flux supplied (V /R1 = K1 x I ). The op-amp will supply LED current to by the LED emitter. The diode is operated in the photovoltaic IN F force sufficient photocurrent to keep the node voltage (Vb) or photoconductive mode. In the photovoltaic mode the equal to Va. diode functions as a current source in parallel with a forward biased silicon diode. The output photodiode is connected to a non-inverting voltage follower amplifier. The photodiode load resistor, R2, The magnitude of the output current and voltage is performs the current to voltage conversion. The output dependent upon the load resistor and the incident LED amplifier voltage is the product of the output forward gain optical flux. When operated in the photoconductive mode (K2) times the LED current and photodiode load, the diode is connected to a bias supply which reverse R2 (V = I x K2 x R2). biases the silicon diode. The magnitude of the output O F current is directly proportional to the LED incident optical Therefore, the overall transfer gain (V /V ) becomes the O IN flux. ratio of the product of the output forward gain (K2) times the photodiode load resistor (R2) to the product of the feedback LED (LIGHT EMITTING DIODE) transfer gain (K1) times the input resistor (R1). This reduces to An infrared emitter constructed of AlGaAs that emits at 890 nm operates efficiently with drive current from 500 A to V /V = (K2 x R2)/(K1 x R1). O IN 40 mA. Best linearity can be obtained at drive currents The overall transfer gain is completely independent of the between 5 mA to 20 mA. Its output flux typically changes by LED forward current. The IL300 transfer gain (K3) is -0.5 %/C over the above operational current range. expressed as the ratio of the output gain (K2) to the feedback gain (K1). This shows that the circuit gain APPLICATION CIRCUIT becomes the product of the IL300 transfer gain times the ratio of the output to input resistors V /V = K3 (R2/R1). O IN V CC IL300 1 8 Va K1-SERVO GAIN + + R3 The ratio of the input photodiode current (I ) to the LED P1 V U1 2 7 in K2 V CC current (I ) i.e., K1 = I /I . F P1 F Vb K1 - I F - V 3 V CC 6 CC K2-FORWARD GAIN V U2 out V The ratio of the output photodiode current (I ) to the LED C P2 + 4 5 current (I ), i.e., K2 = I /I . F P2 F lp1 R2 lp2 R1 K3-TRANSFER GAIN The transfer gain is the ratio of the forward gain to the servo gain, i.e., K3 = K2/K1. Fig. 1 - Typical Application Circuit Rev. 1.8, 02-Jun-14 Document Number: 83622 2 For technical questions, contact: optocoupleranswers vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000