IF-E98

IF E98 50 MHz Fiber Optic Red LED 2/20 Description The IF-E98 is a high-speed red LED housed in a “connector-less” style plastic fiber optic package. The output spectrum of the IF-E98 is produced by a GaAlAs die that peaks at a wavelength of 650 nm, one of the optimal transmission windows of PMMA plastic optical fiber. The device package features an internal micro-lens and a precision molded PBT housing to ensure efficient optical coupling with standard 1000 μm core plastic fiber cable. Application Highlights The fast transition times of the IF-E98 make it suitable for medium-speed analog and digital data links. Link distances in excess of 75 meters at data rates of 50 Mbps are possible using standard 1000 μm core plastic fiber when matched to an IF-D97 photologic detector. The drive circuit is simpler than required for laser diodes, making the IF-E98 a good low-cost alternative in a variety of analog and digital applications. Applications ➤ PC-to-Peripheral Data Links ➤ Motor Controller Triggering Features ➤ Local Area Networks ➤ Medical Instruments ◆ No Optical Design Required ➤ Automotive Electronics ◆ Mates with Standard 1000 μm Core, 2.2 mm Jacketed Plastic Fiber Cable ➤ Digitized Video ◆ Mates with 2.2 mm Jacketed Multimode Glass Fiber, 200/230 or 400/430 using Active Device Adapter – 51 0537; 51 0538 ➤ Electronic Games ➤ Robotics Communications ◆ Internal Micro-lens for Efficient Coupling ➤ Isolation  from Lightning and Voltage Transients ◆ Inexpensive Plastic Connector Housing ◆ Connector-Less Fiber Termination and Connection ◆ Interference-Free Transmission from Light-Tight Housing ◆ Excellent Linearity ◆ Visible Light Output ◆ RoHS Compliant Maximum Ratings (TA =25°C) Operating and Storage Temperature Range (TOP, TSTG)...............-40°to 85°C Junction Temperature (TJ).........85°C Soldering Temperature (2mm from case bottom) (TS) t ≤ 5 s..........................240°C Reverse Voltage (VR)....................5 V Power Dissipation (PTOT) TA =25°C...........100 mW De-rate Above 25°C.....1.75 mW/°C Forward Current, DC (IF)......40 mA Surge Current (IFSM) t ≤ 10 µsec.......................100 mA Characteristics (TA =25°C) Parameter Peak Wavelength Spectral Bandwidth (FWHM) Output Power Coupled into Plastic Fiber (1 mm core diameter). Lens to Fiber Distance ≤0.1 mm, 1m SH4001 fiber, IF=20 mA Output Power Coupled into Glass Fiber (200/230 µm core) Distance Lens to Fiber ≤0.1 mm, 1 meter BC04265-10 fiber, IF=20 mA Switching Times (10% to 90% and 90% to 10%) (per Figure 3) Forward Voltage (IF =20 mA) Symbol Min. Typ. Max. Unit ∆λ – 20 – nm λPEAK 640 650 660 nm PO 275 -5.6 350 -4.6 425 -3.7 µW dBm Po – 54.1 -12.67 – µW dBm tr, tf – - 8 ns Vf - I ndustrial F iber O ptics , I nc . • www.i-fiberoptics.com 1.9 2.3 V 50MHz Fiber Optic Red LED IF E98 1.0 RB RA 0.6 U1 0.4 CA 0.2 580 600 620 640 660 680 Wavelength (nm) 700 720 1255.eps Figure 3. Typical interface circuit. (IF = 30 mA) Total Loss Relative to 1 meter (dB) Figure 1. Typical spectral output versus wavelength. 3.0 0.40 2.5 0.35 2.0 0.30 1.5 0.25 1.0 0.5 0.0 0.20 ➞ 0 0.15 Above 12 meters add 0.17 dB/meter ➞ 0 2 4 6 8 10 Loss / meter (dB/m) Relative Output Optical Power 0.8 12 14 0.10 Fiber Length (m) Figure 2. Output power versus temperature. Figure 4. F iber Loss in GH4001 Application Notes The application circuit given in Figure 3 can be used to drive the IF-E98 for fast applications. Gate U1 represents the circuit being used to drive the IF-E98. This must be able to supply the desired drive current at the output voltage. Resistor RA supplies most of the drive current for the IF-E98. The amount of current supplied is IA = (VU1 – Vf) / RA , where Vf is the IF-E98 forward voltage and VU1 is the drive circuits output voltage under load. Resistor RB speeds up the switching time by keeping the voltage across the IF-E98 from going to zero during turn off. It also supplies some of the drive current. The drive current from RB is IB = (VCC – Vf ) / RB , where VCC is the supply voltage. The total drive current to the IF-E98 is IA + IB. Some power is wasted in RB when the IF-E98 is off. Capacitor CA is used to increase the drive current during switching and speed up the turn on and turn off times. It must not be so large as to overdrive the IF-E98 during turn on or drive the voltage negative during turn off. For lower speed applications, only RA is needed and CA and RB can be omitted. Figure 5. Cross-section of fiber optic device. Fiber Termination Instructions – Plastic Optical Fiber 1. Cut off the ends of the optical fiber with a single-edge razor blade or sharp knife. Try to obtain a precise 90-degree angle (square). 2. Insert the fiber through the locking nut and into the connector until the core tip seats against the internal micro-lens. 3. Screw the connector locking nut down to a snug fit, locking the fiber in place. Do not exceed a torque of 0.4 N.m. Glass fiber – Refer to instructions listed on manufacturer’s data sheet for each active device adapter. I ndustrial F iber O ptics , I nc . • www.i-fiberoptics.com 50MHz Fiber Optic Red LED IF E98 0.35 0.51 3.81 BSC 0.18 0.33 MIN 2.5 .014 .020 0.150 BSC .007 .013 MIN .10 MARKING: • XXXXXX - Lot No. • IFE98 - Part No. OR • Blue housing w/ silver dot • • • • Figure 6. Case outline. PIN PIN PIN PIN 1. 2. 3. 4. 7.49 7.75 Cathode Cathode Anode Cathode Specifications are believed to be accurate but are subject to change. Industrial Fiber Optics assumes no responsibility for the consequences of using the information provided beyond replacement warranty for products not meeting stated specifications. Industrial Fiber Optics products are not authorized for use in life support applications without written approval from the President of Industrial Fiber Optics Corporation. CAUTION: • To avoid degraded device life due to package stress, do not bend or form leads outside the orientation shown on drawing. • Ensure that solder flux does not migrate into the device and block the optical path, degrading the performance. • If washing the device, liquid may become trapped in the part cavity. Ensure that all potentially corrosive materials are flushed out of the device. I ndustrial F iber O ptics , I nc . • www.i-fiberoptics.com .295 .305