IL300 Vishay Semiconductors 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 Lead-free component Component in accordance to RoHS 2002/95/EC and WEEE 2002/96/EC 8 NC C 1 A 2 K1 K2 7 NC C 3 6 C A 4 5 A e3 i179026 Pb Pb-free 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 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. Order Information Part IL300 Remarks 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) For additional information on the available options refer to Option Information. Document Number 83622 Rev. 1.4, 26-Oct-04 www.vishay.com 1 IL300 VISHAY Vishay Semiconductors Operation Description ∆K3-Transfer Gain 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 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-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 • 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). 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. Photodiode 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 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 5.0 mA to 20 mA. Its output flux typically changes by - 0.5 % /°C over the above operational current range. Application Circuit K1-Servo Gain The ratio of the input photodiode current (IP1) to the LED current (IF) i.e., K1 = IP1/IF. V CC Va K2-Forward Gain + The ratio of the output photodiode current (IP2) to the LED current (IF), i.e., K2 = IP2/IF. Vin 2 U1 Vb - IF K1 V CC K3-Transfer Gain The Transfer Gain is the ratio of the Forward Gain to the Servo gain, i.e., K3 = K2/K1. 3 4 lp 1 R1 IL300 1 8 + K2 7 V CC 6 V CC 5 lp 2 Vc U2 V out + R2 iil300_01 Figure 1. Typical Application Circuit www.vishay.com 2 Document Number 83622 Rev. 1.4, 26-Oct-04 IL300 VISHAY Vishay Semiconductors 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 Parameter Test condition Power dissipation Symbol Value Pdiss 160 mW 2.13 mW/°C Derate linearly from 25 °C Unit Forward current IF 60 mA Surge current (pulse width < 10 µs) IPK 250 mA Reverse voltage VR 5.0 V Thermal resistance Rth 470 K/W Tj 100 °C Symbol Value Unit Pdiss 50 mA 0.65 mW/°C Junction temperature Output Parameter Test condition Power dissipation Derate linearly from 25 °C Reverse voltage VR 50 V Junction temperature Tj 100 °C Thermal resistance Rth 1500 K/W Symbol Value Unit Ptot 210 mW 2.8 mW/°C Storage temperature Tstg - 55 to + 150 °C Operating temperature Tamb - 55 to + 100 °C > 5300 VRMS Coupler Parameter Test condition Total package dissipation at 25 °C Derate linearly from 25 °C Isolation test voltage Isolation resistance Document Number 83622 Rev. 1.4, 26-Oct-04 VIO = 500 V, Tamb = 25 °C RIO > 1012 Ω VIO = 500 V, Tamb = 100 °C RIO 11 Ω > 10 www.vishay.com 3 IL300 VISHAY 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 Parameter Forward voltage Test condition IF = 10 mA VF Temperature coefficient Symbol Typ. Max VF Min 1.25 1.50 Unit ∆VF/∆ °C - 2.2 mV/°C V Reverse current VR = 5 V IR 1.0 µA Junction capacitance VF = 0 V, f = 1.0 MHz Cj 15 pF Dynamic resistance IF = 10 mA ∆VF/∆IF 6.0 Ω Output Typ. Max Dark current Parameter Vdet = -15 V, IF = 0 µs ID 1.0 25 Open circuit voltage IF = 10 mA VD 500 mV Short circuit current IF = 10 mA ISC 70 µA Junction capacitance VF = 0, f = 1.0 MHz Cj 12 Noise equivalent power Vdet = 15 V www.vishay.com 4 Test condition Symbol NEP Min 4 x 10 Unit nA pF 14 W/√Hz Document Number 83622 Rev. 1.4, 26-Oct-04 IL300 VISHAY Vishay Semiconductors Coupler Parameter Test condition Symbol Input- output capacitance VF = 0 V, f = 1.0 MHz K1, Servo gain (IP1/IF) IF = 10 mA, Vdet = - 15 V K1 Servo current, see Note 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) see Note 1,2 IF = 10 mA, Vdet = - 15 V K3 Transfer gain linearity IF = 1.0 to 10 mA Min Typ. Max 1.0 0.0050 0.007 0.0036 0.007 0.56 1.00 pF 0.011 µA 70 0.011 µA 70 ∆K3 IF = 1.0 to 10 mA, Tamb = 0 °C to 75 °C Unit 1.65 K2/K1 ± 0.25 % ± 0.5 % 200 KHz -45 Deg. Photoconductive Operation Frequency response IFq = 10 mA, MOD = ± 4.0 mA, RL = 50 Ω Phase response at 200 kHz Vdet = - 15 V BW (-3 db) 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 Switching time Test condition ∆IF = 2.0 mA, IFq = 10 mA Symbol tr Min Typ. 1.0 Max Unit µs tf 1.0 µs Rise time tr 1.75 µs Fall time tf 1.75 µs Document Number 83622 Rev. 1.4, 26-Oct-04 www.vishay.com 5 IL300 VISHAY Vishay Semiconductors Common Mode Transient Immunity Parameter Test condition Common mode capacitance VF = 0, f = 1. MHz Common mode rejection ratio f = 60 Hz, RL = 2.2 KΩ Symbol Min Typ. Max Unit CCM 0.5 pF CMRR 130 dB Typical Characteristics (Tamb = 25 °C unless otherwise specified) 300 IP1 - Servo Photocurrent - µA IF - LED Current - mA 35 30 25 20 15 10 5 0 1.0 iil300_02 200 V D = 15 V 150 100 50 0 1.1 1.2 1.3 VF - LED Forward Voltage - V .1 1.4 1 10 IF - LED Current - mA 100 iil300_04 Figure 2. LED Forward Current vs.Forward Voltage Figure 4. Servo Photocurrent vs. LED Current and Temperature 100 1000 IP1 - Servo Photocurrent - µA IF - LED Current - mA 0°C 25°C 50°C 75°C 250 10 1 V D = –15 V 0°C 25°C 50°C 75°C 100 10 1 .1 .1 1.0 1.1 1.2 1.3 VF - LED Forward Voltage - V 1.4 iil300_03 10 100 iil300_05 Figure 3. LED Forward Current vs.Forward Voltage www.vishay.com 6 1 IF - LED Current - mA Figure 5. Servo Photocurrent vs. LED Current and Temperature Document Number 83622 Rev. 1.4, 26-Oct-04 IL300 VISHAY Vishay Semiconductors 1.2 Normalized to: IP1@ I F=10 mA, TA=25°C 0°C VD=–15 V 25°C 50°C 75°C 2.5 2.0 1.5 NK1 - Normalized Servo Gain Normalized Photocurrent 3.0 1.0 0.5 0.0 1.0 25°C 0.8 50°C 75°C 100°C 0.6 0.4 Normalized to: I F = 10 mA, TA = 25°C 0.2 0.0 0 5 10 15 IF - LED Current - mA 20 25 .1 iil300_06 1 10 IF - LED Current - mA Figure 9. Normalized Servo Gain vs. LED Current and Temperature 1.010 10 1 K3 - Transfer Gain - (K2/K1) Normalized to: IP1@ I F=10 mA, TA=25°C 0°C VD=–15 V 25°C 50°C 75°C .1 0°C 1.005 25°C 1.000 50°C 75°C 0.995 0.990 .01 .1 1 10 0 100 5 10 15 20 25 IF - LED Current - mA IF - LED Current - mA iil300_07 iil300_10 Figure 10. Transfer Gain vs. LED Current and Temperature Figure 7. Normalized Servo Photocurrent vs. LED Current and Temperature 1.0 0°C 25°C 50°C 0.8 75°C 0.6 85°C 0.4 0.2 0.0 1.010 K3 - Transfer Gain - (K2/K1) 1.2 NK1 - Normalized Servo Gain 100 iil300_09 Figure 6. Normalized Servo Photocurrent vs. LED Current and Temperature IP1 - Normalized Photocurrent 0°C Normalized to: I F = 10 mA, TA = 25°C 0°C 1.005 25°C 1.000 50°C 75°C 0.995 0.990 .1 1 10 100 0 IF - LED Current - mA iil300_08 5 10 15 20 25 I F - LED Current - mA iil300_11 Figure 8. Servo Gain vs. LED Current and Temperature Document Number 83622 Rev. 1.4, 26-Oct-04 Figure 11. Normalized Transfer Gain vs. LED Current and Temperature www.vishay.com 7 IL300 VISHAY Vishay Semiconductors 5 14 0 12 Capacitance - pF Amplitude Response - dB I F=10 mA, Mod = ±2.0 mA (peak) R L=1.0 KΩˇ -5 -10 R L=10 KΩˇ 10 8 6 4 2 -15 0 -20 10 4 10 5 0 10 6 2 4 6 Voltage - Vdet 8 10 F - Frequency - Hz iil300_12 iil300_15 Figure 12. Amplitude Response vs. Frequency 5 Application Considerations 45 0 -5 -45 -10 -90 IFq=10 mA Mod= ±4.0 mA TA=25°C RL=50 Ω -15 -135 ∅ - Phase Response - ° Amplitude Response - dB dB PHASE 0 -180 -20 10 3 iil300_13 10 4 10 5 10 6 F - Frequency - Hz 10 7 Figure 13. Amplitude and Phase Response vs. Frequency CMRR - Rejection Ratio - dB -60 -70 -80 -90 -110 -120 100 1000 10000 100000 1000000 F - Frequency - Hz iil300_14 Figure 14. Common-Mode Rejection www.vishay.com 8 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 -100 -130 10 Figure 15. Photodiode Junction Capacitance vs. Reverse Voltage 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. 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 provided by the IL300. Document Number 83622 Rev. 1.4, 26-Oct-04 IL300 VISHAY Vishay Semiconductors The isolated amplifier provides the PWM control signal 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 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 µA. With this data R3 can be calculated. R3 = Vb IPI = 3V 100 µA R5 = VOUT VMONITOR • R3(R1 + R2) R2K3 17166 Or if a unity gain amplifier is being designed (VMONITOR = VOUT, R1 = 0), the equation simplifies to: R5 = R3 K3 17190 = 30 KΩ + ISO AMP +1 - To Control Input 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, 17164 R1 Voltage Monitor R2 iil300_16 Figure 16. Isolated Control Amplifier For best input offset compensation at U1, R2 will equal R3. The value of R1 can easily be calculated from the following. R1 = R2( VMONITOR - 1) Va Document Number 83622 Rev. 1.4, 26-Oct-04 17165 www.vishay.com 9 IL300 VISHAY Vishay Semiconductors DC OUTPUT 110/ 220 MAIN AC/DC RECTIFIER SWITCH SWITCH MODE REGULATOR TDA4918 XFORMER CONTROL AC/DC RECTIFIER ISOLATED FEEDBACK iil300_17 Figure 17. Switching Mode Power Supply Vmonitor R1 20 KW R2 30 KW 7 V 3 + R4 CC 100 W Va 6 U1 LM201 2 1 Vb 8 VCC 4 100 pF IL300 1 2 K1 8 K2 7 3 6 4 5 R3 30 KW VCC Vout R5 30 KW To control input iil300_18 Figure 18. DC Coupled Power Supply Feedback Amplifier Table 1. gives the value of R5 given the production K3 bins. R5 Selection Table 1. 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 www.vishay.com 10 Document Number 83622 Rev. 1.4, 26-Oct-04 IL300 VISHAY Vishay Semiconductors 17096 3.75 Vout = 14.4 mV + 0.6036 x Vin LM 201 Ta = 25°C Vout - Output Voltage - V 3.50 LM201 3.25 3.00 2.75 0.015 0.010 0.005 0.000 -0.005 -0.010 -0.015 4.0 4.5 5.0 5.5 Vin - Input Voltage - V 6.0 iil300_20 Figure 20. Linearity Error vs. Input Voltage 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. 45 2 dB PHASE Amplitude Response - dB 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. 0.020 0 0 -2 -45 -4 -90 -6 -135 -180 -8 2.50 Phase Response - ° Vopamp - VF 2.5 V - 1.3 V = 100Ω R4 = = 12 mA I Fq 0.025 Linearity Error - % 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. 10 3 10 4 10 5 F - Frequency - Hz iil300_21 10 6 2.25 4.0 4.5 5.0 5.5 6.0 Figure 21. Amplitude and Phase Power Supply Control iil300_19 Figure 19. Transfer Gain 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. R3 = Document Number 83622 Rev. 1.4, 26-Oct-04 Vref1 IP1 = Vref1 K1IFq 17098 www.vishay.com 11 IL300 VISHAY Vishay Semiconductors Non-Inverting Input Non-Inverting Output +Vref2 R5 Vin R1 7 3+ R2 2 – –Vcc Vcc 6 100 Ω –Vcc +Vcc 4 20pF 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 1 IL 300 2 20pF –Vcc +Vref2 8 7 Vcc 3+ 7 Vcc 3 6 4 5 6 Vout 2– –Vcc 4 +Vref1 R4 iil300_22 Figure 22. Non-inverting and Inverting Amplifiers Table 2. Optolinear amplifiers Amplifier Input Output Gain Offset Inverting VOUT K3 R4 R2 = VIN R3 (R1 + R2) V ref2 = Non-Inverting Non-Inverting VOUT K3 R4 R2 (R5 + R6) = VIN R3 R5 (R1 + R2) V ref2 = Inverting VOUT - K3 R4 R2 (R5 + R6) = VIN R3 R5 (R1 + R2) V ref2 = Inverting Non-Inverting Non-Inverting Inverting Non-Inverting Inverting VOUT - K3 R4 R2 = VIN R3 (R1 + R2) V ref2 = V ref1 R4 K3 R3 - Vref1 R4 (R5 + R6) K3 R3 R6 Vref1 R4 (R5 + R6) K3 R3 R6 - Vref1 R4 K3 R3 17189 These amplifiers provide either an inverting or noninverting 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 voltwww.vishay.com 12 age 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. Document Number 83622 Rev. 1.4, 26-Oct-04 IL300 VISHAY Vishay Semiconductors 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. 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 Package Dimensions in Inches (mm) .130 (3.302) .150 (3.810) .021 (0.527) .035 (0.889) Pin 1 ID. .240 (6.096) .260 (6.604) .100 (2.540) 1 8 2 7 3 6 4 5 4° .016 (.406) .020 (.508 ) .040 (1.016) .050 (1.270 ) .380 (9.652) .400 (10.16) .280 (7.112) .330 (8.382) .020 (0.508) REF. .010 (0.254) REF. .300 Typ. (7.62) Typ. 3° 9 i178010 .050 (1.270) .008 (0.203) .012 (0.305) Option 6 Option 7 .407 (10.36) .391 (9.96) .307 (7.8) .291 (7.4) .300 (7.62) TYP. .010 (0.254) REF. ISO Method A 10° .110 (2.794) .130 (3.302) Option 9 .375 (9.53) .395 (10.03) .300 (7.62) ref. .028 (0.7) MIN. .180 (4.6) .160 (4.1) .0040 (.102) .0098 (.249) .315 (8.0) MIN. .014 (0.35) .010 (0.25) .400 (10.16) .430 (10.92) Document Number 83622 Rev. 1.4, 26-Oct-04 .331 (8.4) MIN. .406 (10.3) MAX. .012 (.30) typ. .020 (.51) .040 (1.02) .315 (8.00) min. 15° max. 18450 www.vishay.com 13 IL300 VISHAY 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 www.vishay.com 14 Document Number 83622 Rev. 1.4, 26-Oct-04 VISHAY IL300 Vishay Semiconductors Document Number 83622 Rev. 1.4, 26-Oct-04 www.vishay.com 15