IL300 www.vishay.com Vishay Semiconductors Linear Optocoupler, High Gain Stability, Wide Bandwidth FEATURES • • • • • • • • • 8 NC C 1 A 2 K2 K1 7 NC C 3 6 C A 4 5 A i179026_2 V D E i179026 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 LEDs flux and generates a control signal (IP1) that can be used to servo the LED drive current. This technique compensates for the LED’s non-linear, time, and temperature characteristics. The output PIN photodiode 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. Couples AC and DC signals 0.01 % servo linearity Wide bandwidth, > 200 kHz High gain stability, ± 0.005 %/°C typically Low input-output capacitance Low power consumption, < 15 mW Isolation test voltage, 5300 VRMS, 1 s Internal insulation distance, > 0.4 mm Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 APPLICATIONS • • • • • Power supply feedback voltage/current Medical sensor isolation Audio signal interfacing Isolated process control transducers Digital telephone isolation AGENCY APPROVALS • • • • UL file no. E52744, system code H DIN EN 60747-5-5 (VDE 0884-5) available with option 1 BSI FIMKO ORDERING INFORMATION I L 3 0 0 - D PART NUMBER E F G - X K3 BIN 0 # # PACKAGE OPTION DIP-8 Option 6 7.62 mm 10.16 mm T TAPE AND REEL Option 7 > 0.1 mm > 0.7 mm AGENCY CERTIFIED/ PACKAGE UL, cUL, BSI, FIMKO K3 BIN 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 IL300 IL300-DEFG - - IL300-EF DIP-8, 400 mil, option 6 IL300-X006 IL300-DEFG-X006 - - SMD-8, option 7 IL300-X007T(1) IL300-DEFG-X007T(1) DIP-8 IL300-EFG-X007 IL300-DE-X007T SMD-8, option 9 IL300-X009T(1) IL300-DEFG-X009T(1) VDE, UL, BSI, FIMKO Option 9 0.945 to 1.181 0.851 to 0.955 0.945 to 1.061 - IL300-E IL300-EF-X006 IL300-FG-X006 IL300-E-X006 IL300-EF-X007T(1) - - - IL300-EF-X009T(1) IL300-F IL300-F-X006 IL300-E-X007T IL300-F-X007 - IL300-F-X009T(1) 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 DIP-8 IL300-X001 IL300-DEFG-X001 - - IL300-EF-X001 - IL300-E-X001 IL300-F-X001 DIP-8, 400 mil, option 6 IL300-X016 IL300-DEFG-X016 - - IL300-EF-X016 - - IL300-F-X016 SMD-8, option 7 IL300-X017 IL300-DEFG-X017T(1) - - IL300-EF-X017T(1) - SMD-8, option 9 - - - - - - 0.945 to 1.181 0.851 to 0.955 0.945 to 1.061 IL300-E-X017T IL300-F-X017T(1) - IL300-F-X019T(1) 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: [email protected] 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 IL300 www.vishay.com Vishay Semiconductors OPERATION DESCRIPTION K3-TRANSFER FAIN LINEARITY 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 = VIN/R1). 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. The magnitude of this current is directly proportional to the feedback transfer gain (K1) times the LED drive current (VIN/R1 = K1 x IF). The op-amp will supply LED current to force sufficient photocurrent to keep the node voltage (Vb) equal to Va. 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 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 (VO = IF x K2 x 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 x R2)/(K1 x 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 PHOTODIODE The magnitude of the output current and voltage is dependent 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 μA 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. APPLICATION CIRCUIT 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. VCC Va + Vin R3 2 U1 Vb K2-FORWARD GAIN The ratio of the output photodiode current (IP2) to the LED current (IF), i.e., K2 = IP2/IF. - IF K1 VCC 3 4 lp1 R1 IL300 8 1 + K2 7 VCC 6 VCC 5 lp2 VC U2 Vout + R2 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: [email protected] 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 IL300 www.vishay.com Vishay Semiconductors ABSOLUTE MAXIMUM RATINGS (Tamb = 25 °C, unless otherwise specified) PARAMETER TEST CONDITION SYMBOL VALUE UNIT INPUT Power dissipation Pdiss Derate linearly from 25 °C 160 mW 2.13 mW/°C Forward current IF 60 mA Surge current (pulse width < 10 μs) IPK 250 mA Reverse voltage VR 5 V Thermal resistance Rth 470 K/W Tj 100 °C Junction temperature OUTPUT Power dissipation Pdiss Derate linearly from 25 °C 50 mW 0.65 mW/°C Reverse voltage VR 50 V Thermal resistance Rth 1500 K/W Tj 100 °C Ptot 210 mW 2.8 mW/°C °C Junction temperature COUPLER Total package dissipation at 25 °C Derate linearly from 25 °C Storage temperature Tstg -55 to +150 Operating temperature Tamb -55 to +100 °C Isolation test voltage VISO > 5300 VRMS VIO = 500 V, Tamb = 25 °C RIO > 1012 VIO = 500 V, Tamb = 100 °C RIO > 1011 Isolation resistance Note • 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 ratings for extended periods of the time can adversely affect reliability. ELECTRICAL CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified) PARAMETER TEST CONDITION SYMBOL MIN. TYP. MAX. UNIT VF 1.25 1.50 VF/°C -2.2 mV/°C INPUT (LED EMITTER) Forward voltage IF = 10 mA VF temperature coefficient Reverse current Junction capacitance Dynamic resistance V VR = 5 V IR 1 μA VF = 0 V, f = 1 MHz Cj 15 pF IF = 10 mA VF/IF 6 OUTPUT Dark current Open circuit voltage Short circuit current Junction capacitance Noise equivalent power Vdet = -15 V, IF = 0 A ID 1 IF = 10 mA VD 500 mV μA 25 nA IF = 10 mA ISC 70 VF = 0 V, f = 1 MHz Cj 12 pF Vdet = 15 V NEP 4 x 10-14 W/Hz 1 pF COUPLER Input-output capacitance VF = 0 V, f = 1 MHz K1, servo gain (IP1/IF) IF = 10 mA, Vdet = -15 V K1 Servo current (1)(2) IF = 10 mA, Vdet = -15 V IP1 K2, forward gain (IP2/IF) IF = 10 mA, Vdet = -15 V K2 Forward current IF = 10 mA, Vdet = -15 V IP2 K3, transfer gain (K2/K1) (1)(2) IF = 10 mA, Vdet = -15 V K3 Rev. 1.8, 02-Jun-14 0.0050 0.007 0.011 70 0.0036 0.007 μA 0.011 70 0.56 1 μA 1.65 K2/K1 Document Number: 83622 3 For technical questions, contact: [email protected] 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 IL300 www.vishay.com Vishay Semiconductors ELECTRICAL CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified) PARAMETER TEST CONDITION SYMBOL IF = 10 mA, Vdet = -15 V IF = 1 mA to 10 mA MIN. TYP. MAX. UNIT K3/TA ± 0.005 ± 0.15 %/°C K3 ± 0.25 % ± 0.5 % 200 kHz -45 Deg. COUPLER Transfer gain stability Transfer gain linearity IF = 1 mA to 10 mA, Tamb = 0 °C to 75 °C PHOTOCONDUCTIVE OPERATION Frequency response IFq = 10 mA, MOD = ± 4 mA, RL = 50 Phase response at 200 kHz BW (-3 db) Vdet = -15 V Notes • Minimum and maximum values were tested requierements. 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. (1) Bin sorting: K3 (transfer gain) is sorted into bins that are ± 6 % , as follows: Bin A = 0.557 to 0.626 Bin B = 0.620 to 0.696 Bin C = 0.690 to 0.773 Bin D = 0.765 to 0.859 Bin E = 0.851 to 0.955 Bin F = 0.945 to 1.061 Bin G = 1.051 to 1.181 Bin H = 1.169 to 1.311 Bin I = 1.297 to 1.456 Bin J = 1.442 to 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, the bins can be grouped together as follows: 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 IF = 2 mA, IFq = 10 mA tr 1 μs tf 1 μs Rise time tr 1.75 μs Fall time tf 1.75 μs Switching time MIN. TYP. MAX. UNIT COMMON MODE TRANSIENT IMMUNITY PARAMETER TEST CONDITION SYMBOL Common mode capacitance VF = 0 V, f = 1 MHz CCM 0.5 pF f = 60 Hz, RL = 2.2 k CMRR 130 dB Common mode rejection ratio Rev. 1.8, 02-Jun-14 MIN. TYP. MAX. UNIT Document Number: 83622 4 For technical questions, contact: [email protected] 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 IL300 www.vishay.com Vishay Semiconductors TYPICAL CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified) 0.010 30 K1- Ser vo Gain - IP1/I F IF - LED Current (mA) 35 25 20 15 10 0° 0.008 25° 50° 75° 100° 0.006 0.004 0.002 5 0 1.0 iil300_02 0 1.1 1.2 1.3 VF - LED Forward Voltage (V) 0.1 1.4 17754 Fig. 2 - LED Forward Current vs. Forward Voltage 100 1.010 VD = - 15 V 0 °C 25 °C 50 °C 75 °C 250 200 K3 - Transfer Gain - (K2/K1) IP1 - Servo Photocurrent (µA) 10 Fig. 5 - Servo Gain vs. LED Current and Temperature 300 150 100 50 0 Normalized to: IF = 10 mA TA = 25 °C 0 °C 1.005 25 °C 1.000 50 °C 75 °C 0.995 0.990 0.1 1 10 0 100 IF - LED Current (mA) iil300_04 iil300_11 5 10 15 20 25 IF - LED Current (mA) Fig. 6 - Normalized Transfer Gain vs. LED Current and Temperature Fig. 3 - Servo Photocurrent vs. LED Current and Temperature 3.0 5 Normalized to: IP1 at IF = 10 mA 2.5 TA = 25 °C VD = - 15 V 0 °C 25 °C 50 °C 75 °C 2.0 1.5 Amplitude Response (dB) Normalized Photocurrent 1 IF - L ED Current (mA) 1.0 0.5 0.0 IF = 10 mA, Mod = ± 2.0 Ma (peak) 0 RL = 1 kΩ -5 - 10 RL = 10 kΩ - 15 - 20 0 iil300_06 5 10 15 20 25 IF - LED Current (mA) Fig. 4 - Normalized Servo Photocurrent vs. LED Current and Temperature Rev. 1.8, 02-Jun-14 104 iil300_12 105 106 F - Frequency (Hz) Fig. 7 - Amplitude Response vs. Frequency Document Number: 83622 5 For technical questions, contact: [email protected] 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 IL300 www.vishay.com Vishay Semiconductors APPLICATION CONSIDERATIONS Amplitude Response (dB) dB Phase 0 0 - 45 -5 - 90 - 10 IFq = 10 mA Mod = ± 4.0 mA TA = 25 °C RL = 50 Ω - 15 - 135 Ø - Phase Response (°) 45 5 - 180 - 20 103 104 105 106 107 F - Frequency (Hz) iil300_13 Fig. 8 - Amplitude and Phase Response vs. Frequency In applications such as monitoring the output voltage from a line powered switch mode power supply, measuring bioelectric signals, interfacing to industrial transducers, or making floating current measurements, 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 nonlinearity and drift induced by time and temperature, by monitoring LED output flux. A pin photodiode on the input side is optically coupled to the LED and produces a current directly proportional 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 photodiode. The output photodiode current can be directly or amplified to satisfy the needs of succeeding circuits. ISOLATED FEEDBACK AMPLIFIER CMRR - Rejection Ratio (dB) - 60 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 signal for a line powered switch mode power is quite simple, as the following example will illustrate. - 70 - 80 - 90 See figure 12 for the basic structure of the switch mode supply using the Infineon TDA4918 push-pull switched power supply control cChip. Line isolation are provided by the high frequency transformer. The voltage monitor isolation will be provided by the IL300. - 100 - 110 - 120 - 130 101 102 iil300_14 103 104 105 106 F - Frequency (Hz) Fig. 9 - Common-Mode Rejection 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 V signal. Given this information, the amplifier circuit topology shown in figure 14 is selected. 14 Capacitance (pF) 12 10 8 6 4 2 0 0 iil300_15 2 4 6 8 10 Voltage (Vdet) Fig. 10 - Photodiode Junction Capacitance vs. Reverse Voltage Rev. 1.8, 02-Jun-14 The isolated amplifier provides the PWM control signal which is derived from the output supply voltage. Figure 13 more closely shows the basic function of the amplifier. The power supply voltage is scaled by R1 and R2 so that there is + 3 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 differential 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. Figure 4 shows the servo photocurrent at IFq is found to be 100 mA. With this data R3 can be calculated. Vb 3V R3 = ------ = ------------------ = 30 k I PI 100 μA Document Number: 83622 6 For technical questions, contact: [email protected] 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 IL300 www.vishay.com To control input Vishay Semiconductors + ISO AMP +1 - R1 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, V OUT R3 x R1 + R2 R5 = --------------------------- x ---------------------------------------- V MONITOR R2 x K3 Voltage monitor R2 iil300_16 Fig. 11 - Isolated Control Amplifier or if a unity gain amplifier is being designed (VMONITOR = VOUT, R1 = 0), the equation simplifies to: For best input offset compensation at U1, R2 will equal R3. The value of R1 can easily be calculated from the following. V MONITOR R1 = R2 x ------------------------- - 1 Va R3 R5 = ------K3 DC output 110/ 220 main AC/DC rectifier Switch AC/DC rectifier Xformer Switch mode regulator TDA4918 Control Isolated feedback iil300_17 Fig. 12 - Switching Mode Power Supply V monitor R1 20 kΩ IL300 3 + Va R2 30 kΩ Vb 7 1 V CC 6 U1 LM201 2 4 2 1 8 8 R4 100 Ω K2 7 K1 V CC 3 6 4 5 100 pF R3 30 kΩ V CC V out R5 30 kΩ To control input iil300_18 Fig. 13 - DC Coupled Power Supply Feedback Amplifier Rev. 1.8, 02-Jun-14 Document Number: 83622 7 For technical questions, contact: [email protected] 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 IL300 www.vishay.com Vishay Semiconductors Table 1. Gives the value of R5 given the production K3 bin. TABLE 1 - R5 SELECTION BIN K3 MAX. TYP. 1 % k A 0.560 0.623 0.59 51.1 B 0.623 0.693 0.66 45.3 C 0.693 0.769 0.73 41.2 D 0.769 0.855 0.81 37.4 E 0.855 0.950 0.93 32.4 F 0.950 1.056 1 30 G 1.056 1.175 1.11 27 H 1.175 1.304 1.24 24 I 1.304 1.449 1.37 22 J 1.449 1.610 1.53 19.4 V opamp - VF 2.5 V - 1.3 V R4 = --------------------------------- = --------------------------------- = 100 I Fq 12 mA 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. 3.75 Vout - Output Voltage (V) The last step in the design is selecting the LED current limiting resistor (R4). The output of the operational 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 operational output voltage, R4 can be calculated. R5 RESISTOR MIN. 3.25 3.00 2.75 2.50 2.25 4.0 4.5 5.0 5.5 6.0 iil300_19 The DC transfer characteristics are shown in figure 17. 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 V to 6 V in a servo mode; see figure 15. Fig. 14 - Transfer Gain 0.025 0.020 Linearity Error (%) Vout = 14.4 mV + 0.6036 x Vin LM 201 Ta = 25 °C 3.50 LM201 0.015 0.010 0.005 0.000 - 0.005 - 0.010 - 0.015 4.0 iil300_20 4.5 5.0 5.5 6.0 Vin - Input Voltage (V) Fig. 15 - Linearity Error vs. Input Voltage The AC characteristics are also quite impressive offering a -3 dB bandwidth of 100 kHz, with a -45° phase shift at 80 kHz as shown in figure 16. Rev. 1.8, 02-Jun-14 Document Number: 83622 8 For technical questions, contact: [email protected] 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 IL300 www.vishay.com Vishay Semiconductors dB Phase 0 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 17. 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. 45 0 -2 - 45 -4 - 90 -6 - 135 -8 Phase Response (°) Amplitude Response (dB) 2 - 180 103 104 iil300_21 105 V ref1 V ref1 R3 = ----------- = --------------I P1 K1I Fq 106 F - Frequency (Hz) Fig. 16 - Amplitude and Phase Power Supply Control Non-inverting input Non-inverting output + Vref2 R5 Vin R1 7 3+ R2 2 – - Vcc Vcc 6 100 Ω - Vcc +Vcc 4 20 pF 1 IL 300 8 2 7 3 6 4 5 2 – Vcc R6 7 Vcc 3+ R3 6 Vo - Vcc 4 R4 - Vref1 Inverting output Inverting input Vin R1 7 3+ R2 2 – Vcc 6 100 Ω Vcc + Vcc 4 R3 20 pF - Vcc 1 2 IL 300 + Vref2 8 7 Vcc 3+ 7 Vcc 3 6 4 5 2– - Vcc 4 6 Vout + Vref1 R4 iil300_22 Fig. 17 - Non-inverting and Inverting Amplifiers TABLE 2 - OPTOLINEAR AMPLIEFIERS AMPLIFIER INPUT OUTPUT Inverting Inverting Non-inverting Non-inverting Non-inverting GAIN V OUT K3 x R4 x R2 ------------- = -----------------------------------------V IN R3 x R1 x R2 OFFSET V ref1 x R4 x K3 V ref2 = -----------------------------------------R3 V OUT K3 x R4 x R2 x R5 + R6 ------------- = ------------------------------------------------------------------------V IN R3 x R5 x R1 x R2 - V ref1 x R4 x R5 + R6 x K3 V ref2 = ---------------------------------------------------------------------------------R3 x R6 Inverting Non-inverting V OUT - K3 x R4 x R2 x R5 + R6 ------------- = -----------------------------------------------------------------------------V IN R3 x R1 x R2 V ref1 x R4 x R5 + R6 x K3 V ref2 = -----------------------------------------------------------------------------R3 x R6 Non-inverting Inverting V OUT - K3 x R4 x R2 ------------- = -----------------------------------------V IN R3 x R1 x R2 - V ref1 x R4 x K3 V ref2 = ---------------------------------------------R3 Inverting Rev. 1.8, 02-Jun-14 Document Number: 83622 9 For technical questions, contact: [email protected] 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 IL300 www.vishay.com Vishay Semiconductors 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 configurations along with the specific transfer gain equations. The offset column refers to the calculation of the output offset or Vref2 necessary to provide a zero voltage output for a zero voltage input. The non-inverting input amplifier requires the use of a bipolar supply, 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 millimeters Pin one ID 0.527 0.889 3.302 3.810 6.096 6.604 2.540 0.46 0.58 1.016 1.270 1 8 2 7 3 6 4 5 4° 1.270 9.652 10.16 7.112 8.382 0.254 ref. 7.62 typ. 0.254 ref. 0.508 ref. 3° 9 ISO method A 10° i178010 0.203 0.305 Option 6 Option 7 Option 9 10.36 9.96 7.62 typ. 9.53 10.03 2.794 3.302 7.8 7.4 7.62 ref. 0.7 4.6 4.1 0.102 0.249 8 min. 0.35 0.25 0.25 typ. 0.51 1.02 8.4 min. 15° max. 8 min. 10.16 10.92 10.3 max. 18450 PACKAGE MARKING (example of IL300-E-X001) IL300-E X001 V YWW H 68 Rev. 1.8, 02-Jun-14 Document Number: 83622 10 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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