HFBR-0536

Inexpensive dc to 32 MBd Fiberoptic Solutions for Industrial, Medical,Telecom, and Proprietary Data Communication Applications Application Note 1121 Introduction Low-cost fiberoptic data-communication links have been used to replace copper wire in numerous industrial, medical, and proprietary applications. The fiberoptic transmitter and receiver circuits in this publication address a wide range of applications. These recommended circuits are compatible with unencoded or burst-mode communication protocols originally developed for use with copper wire. Complete TTL compatible digital transceiver solutions, including the schematic, printed circuit artwork, and material lists, are presented in this application note, so that users of this low-cost fiberoptic technology do not need to do any analog design. Designers are encouraged to embed these complete fiberoptic solutions into their products and various methods for electronically downloading the reference designs are described. Why Use Optical Fibers? Copper wire is an established technology that has been successfully used to transmit data in a wide range of industrial, medical and proprietary applications, but copper can be difficult or impossible to be used in numerous situations. By using differential line receivers, optocouplers, or transformers conventional copper wire cables can be used to transmit data in applications where the reference or ground potentials of two systems are different, but during and after the initial installation great care must still be taken not to corrupt the data with noise induced into the cable’s metallic shields by adjacent power lines or differences in ground potential. Unlike copper wires, optical fibers do not require rigorous grounding rules to avoid ground loop interference, and fiberoptic cables do not need termination resistors to avoid reflections. Optical transceivers and cables can be designed into systems so that they survive lightning strikes that would normally damage metallic conductors or wire input/output (I/O) cards; in essence, fiberoptic data links are used in electrically noisy environments where copper wire fails. In addition to all of these inherent advantages there are two other reasons why optical fibers are beginning to replace copper wires. The first reason is that training and simple tools are now available. The second reason is that when using plastic optical fiber (POF), or hard clad silica (HCS) fiber, the total cost of the data communication link is roughly the same as when using copper wires. Wire Communication Protocols and Optical Data Links Many existing serial wire communication protocols were developed for differential line receivers or optocouplers that can sense the dc component of the data communication signal. This type of serial data is often called arbitrary duty factor data because it can remain in the logic “1” or logic “0” state for indefinite periods of time. Arbitrary duty factor data has an average value, which can instantaneously be anywhere between 0 percent and 100 percent of the binary signal’s amplitude, or in other words, arbitrary duty factor data contains dc components. Communication protocols that were developed specifically for use with copper wire often require an optical receiver that is dc coupled or capable of detecting if the data is changing from a high-to-low or low-to-high logic state. That is, the receiver needs to be an edge detector. At relatively modest data rates between zero and 10-Mbits/sec it is possible to construct dc coupled TTL-compatible fiberoptic receivers. The Avago Technologies HFBR-2521Z is a TTL-compatible, dc to 5-Mbit/sec receiver, and the HFBR-2528Z is a dc to 10-Mbit/sec CMOS or TTL-compatible receiver. Additional information about dc to 5-Mbit/ sec applications can be found in Avago Technologies AN-1035, and applications support for dc to 10-Mbit/sec applications can be obtained by reading AN-1080. This application note will focus on higher speed or higher performance arbitrary duty factor optical data communication links that work at higher data rates or greater distances than achievable with the HFBR-2521Z or HFBR- 2528Z components. The optical transceivers shown in this application note can also be used in burst-mode applications where the data is transmitted in packets and there are no transitions between bursts of date. The Pros and Cons of Arbitrary Duty Factor or Burst Mode Data The most important advantage of any existing data communication protocol is that it already exists, and typically works reasonably well with copper wires in many applications. On the other hand, existing protocols for copper wire are usually not the best choice for optimizing the performance of a fiberoptic link. For example, a receiver designed for use with arbitrary duty factor data, or burst mode data, will typically be 4 dB to 7 dB less sensitive than when the same components are used in receiver circuits optimized for use with encoded data. Encoded data normally has a 50 percent duty factor, or restricted duty factor variation, which allows the construction of higher-sensitivity fiberoptic receivers. The best arbitrary duty factor or burst-mode receivers described in this application note are considerably less sensitive than the encoded data receivers described in AN-1122. When sending arbitrary duty factor data, a separate optical link must be used to send the clock if synchronous serial communication is desired, or an asynchronous data communication system can be implemented if the data is oversampled by a local clock oscillator located Figure 1. Relationship Between PWD and Sampling Rate 2 at the receiving end of the fiberoptic data link. To avoid excessive pulsewidth distortion (PWD), the local oscillator used to oversample the received data must operate at frequency that is greater than the serial data rate. For instance, if the data rate is 32-Mbits/sec, a clock frequency of 100 MHz will assure three times oversampling of the received serial data. As the sampling rate decreases, the PWD of the reclocked data increases. Conversely, when the sampling rate is increased, the PWD of the asynchronous data link decreases. At modest data rates such as 32-Mbits/sec the frequency of the local clock oscillator will rise sharply if higher oversampling rates are attempted; for instance, to guarantee five times oversampling the clock oscillator at the receiver would need to operate at a frequency slightly greater than 160 MHz. Refer to Figure 1 for a graphical representation of the relationship between the sampling rate and PWD of an asynchronous serial data communication link. The 10Base-T copper standard sends no transitions between packets of Ethernet data, but the 10Base-FL standard for optical fiber media inserts a 1 MHz square wave between each packet of Ethernet traffic. SERIAL DATA SOURCE 32 M BITS/SEC 0% TO 100% DUTY FACTOR (D.F.) 32 MBd NRZ DATA fo = 16 MHz MANCHESTER ENCODER (50% EFFICIENT) 50% D.F. 64 MBd ENCODED DATA fo= 32 MHz 4B5B ENCODER (80% EFFICIENT) 40% TO 60% D.F. 40 MBd ENCODED DATA fo = 20 MHz 50% D.F. 40 MBd ENCODED DATA fo= 20 MHz 8B10B ENCODER (80% EFFICIENT) (27)-1 SCRAMBLER (100% EFFICIENT) APPROXIMATELY 50% D.F. 32 MBd ENCODED DATA fo = 16 MHz NOTE THAT Fo IS THE MAXIMUM FUNDAMENTAL FREQUENCY OF THE ENCODED DATA. THE MINMUM FUNDAMENTAL FREQUENCY OF THE ENCODED DATA IS DETERMINED BY THE ENCODER'S RUN LIMIT Figure 2. Attributes of Encoding Burst-mode serial communication systems also have some interesting characteristics. They usually require more communication channel bandwidth, since the most common burst-mode protocols normally use a Manchester encoder, which transmits more than one symbol for each bit. Figure 2 shows how the communication channel’s bandwidth must increase when the Manchester code normally used in Ethernet data communication systems is applied to unencoded serial data. The big advantage of encoding is that it merges the clock and data so that only one communication channel is needed for both signals. In most high-performance fiberoptic communication systems, the data and clock are merged onto a single serial channel using a method that has better efficiency than Manchester encoding. Figure 2 shows several common encoding methods with better efficiency than Manchester code. Other important relationships between bits/second, and symbols/second, expressed in Baud (Bd) are explained by Figure 2. Note that arbitrary duty factor unencoded data is one of the few instances when data rate in bits/second, and the symbol rate in Bd are equal. Relationships between the signaling rate expressed in Baud and the fundamental frequency of digital data communication signals are also shown in Figure 2. Burst-mode communication protocols are used in popular serial communication systems such as Ethernet, or Arcnet. Burst-mode protocols allow many network users to share a common pair of copper conductors with a tapped connection for each user network interface. The key disadvantages of this simple tapped line 3 architecture is that only one user can send data at any time, and a preamble must be sent to wake up or initialize the receiving node’s timing recovery circuit at the beginning of each packet of burstmode data. Burstmode, shared-wire communication links are not particularly fast, because no data can be transmitted during the preamble and each node must wait until the tapped line is quiet before data can be transmitted. Burst-mode protocols are not necessarily the best choice for optical communication links, because optical fibers are not easily and inexpensively tapped. When Ethernet traffic is sent via optical fibers, the wiring architecture is changed from a tapped serial transmission line to hubs that contain active fiberoptic transmitters and receivers. The active hubs are then connected to one another in a “star” configuration, because this star architecture is compatible with existing low-cost fiberoptic transceiver and cabling technologies. Fiberoptic receivers can be designed to accommodate burst-mode data, but it is much easier to build highsensitivity fiberoptic receivers when data is sent continuously. Continuous transmission also has other advantages. Continuous transmission increases the throughput of the LAN since there is no dead-time between packets of data. Throughput is substantially improved when data is continuously transmitted, because no time is wasted sending preambles of sufficient length to allow the receiver’s timing-recovery circuit to acquire the phase lock required to synchronously detect each serial data packet. It is interesting to note that the IEEE 802.3 10Base-FL standard for fiberoptic media uses a different transmission. The 1 MHz idle signal described in the IEEE 802.3 10Base-FL standard assures that the burst-mode protocol used for copper wire Ethernet is converted to a protocol that will optimize the performance of a fiberoptic receiver. More details about inexpensive fiberoptic solutions suitable for use with higher-efficiency block substitution codes, such as 4B5B, and 8B10B, can be found in Avago Technologies Application Notes 1122 and 1123. This publication will stay focused on solutions compatible with unencoded data, because many system designers need a fiberoptic solution that can use protocols originally developed for use with copper wires. Distances and Data Rates Achievable The simple transceivers recommended in this application note can be used to address a very wide range of distances, data rates, and system cost targets. The maximum distances allowed with various types of optical fiber when using Avago Technologies’ wide range of fiberoptic transceiver components are shown Table 1. One simple calculation is needed to optimize the receiver for use at the desired maximum symbol rate of your system application. No transmitter or receiver adjustments are needed when using fiber cable length that vary from virtually zero length up to the maximum distances specified in Table 1. Table 1 4 Transmitter Component Part # and Wavelength Receiver Component Part # and Wavelength Fiber Diameter Type Maximum Distance at 32 MBd with the transceiver circuits recommended in this publication HFBR-15X7Z 650 nm LED HFBR-25X6Z 650 nm 1 mm plastic step index 27 meters with transmitter in Fig. 3 and receiver in Fig. 4 HFBR-15X7Z 650 nm LED HFBR-25X6Z 650 nm 1 mm plastic step index 42 meters with transmitter in Fig. 3 and receiver in Fig. 5 HFBR-15X7Z 650 nm LED HFBR-25X6Z 650 nm 200 mm HCS step index 690 meters with transmitter in Fig. 3 and receiver in Fig. 4 HFBR-15X7Z 650 nm LED HFBR-25X6Z 650 nm 200 mm HCS step index 1.0 kilometer with transmitter in Fig. 3 and receiver in Fig. 5 HFBR-14X2Z 820 nm LED HFBR-24X6Z 820 nm 200 mm HCS step index 690 meters with transmitter in Fig. 3 and receiver in Fig. 4 HFBR-14X2Z 820 nm LED HFBR-24X6Z 820 nm 200 mm HCS step index 1.0 kilometer with transmitter in Fig. 3 and receiver in Fig. 5 HFBR-14X4Z 820 nm LED HFBR-24X6Z 820 nm 62.5/125 mm multimode glass 800 meters with transmitter in Fig. 3 and receiver in Fig. 4 HFBR-14X4Z 820 nm LED HFBR-24X6Z 820 nm 62.5/125 mm multimode glass 1.6 kilometers with transmitter in Fig. 3 and receiver in Fig. 5 HFBR-13X2TZ 1300 nm LED HFBR-23X6TZ 1300 nm 62.5/125 mm multimode glass 1.3 kilometers with transmitter in Fig 3. and receiver in Fig. 4 HFBR-13X2TZ 1300 nm LED HFBR-23X6TZ 1300 nm 62.5/125 mm multimode glass 3.3 kilometers with transmitter in Fig. 3 and receiver in Fig. 5 L1 TDK #HF30ACB453215 +5 V HOST SYSTEM POWER C1 0.1 mF C2 10 mF U1C Vcc 14 74ACTQ00 9 8 U1D 74ACTQ00 12 11 TTL IN 13 R1 10 4 7 GND U1B 74ACTQ00 U2A 3 HFBR-15X7Z 4 R2 C3 5 6 R3 5 1 8 1 2 U1A 74ACTQ00 3 2 6 2 7 8 1 U2B HFBR-14X4Z 3 4 5 Figure 3. TTL-Compatible LED Transmitter Table 2 Transmitter HFBR-15X7Z 650 nm LED HFBR-14X4Z 820 nm LED HFBR-13X2TZ 1300 nm LED 1 mm Plastic 200 mm HCS 62.5/125 mm 62.5/125 mm R1 120 W 33 W 33 W 22 W R2 120 W 33 W 33 W 27 W R3 390 W 270 W 270 W ∞ C3 82 pF 470 pF 75 pF 150 pF Fiber Type Simple TTL Compatible LED Transmitter A high-performance, low-cost TTL-compatible transmitter is shown in Figure 3. This transmitter recommendation is deceptively simple, but has been highly developed to deliver the best performance achievable with Avago Technologies’ LED transmitters. The recommended transmitter is also very inexpensive, because the 74ACTQ00 gate used to current modulate the LED can typically be obtained for under $0.40. No calculations are required to determine the passive component needed when using various Avago Technologies’ LEDs with a wide range of optical fibers. Simply use the 5 recommended component values shown in Table 2, and the transmitter shown in Figure 3 can be used to address a broad range of applications. Simple TTL Compatible Receiver A very simple TTL-compatible receiver that has adequate sensitivity for a wide range of applications is shown in Figure 4. Equation 1 allows the designer to quickly determine the values of C6 and C7 so that the receiver is optimized for operation at any data rate up to a maximum of 32 MBd. R4 4.7 C5 0.1 mF 8 C9 0.1 mF + C10 10mF + C11 0.1mF C12 10 mF 1 2 U3A HFBR-25X6Z 3 4 R6 270 1 U3B HFBR-24X6Z 2 5 U4 LT1016CS8 C7 6 2 R10 240 1 3 8 TTL OUT (-) R8 120 k C6 5 8 7 C13 0.1 mF 6 3 R11 240 4 R7 270 R9 120 k 7 5 +5 V NOISY HOST SYSTEM POWER L2 COILCRAFT 1008LS-122XKBC R5 4.7 4 TTL OUT (+) R12 2.2 k C8 0.1 mF L3 COILCRAFT 1008LS-122XKBC Figure 4. Simple Fiberoptic Reciver for use with dc to 32 MBd Arbitary Duty Factor Data Enhanced TTL Compatible Receiver The receiver circuit shown in Figure 5 is suitable for use in applications that require greater optical cable lengths. The receiver in Figure 5 provides 6 dB more receiver sensitivity than the simplified receiver shown in Figure 4. Equation 2 allows the designer to quickly determine the values of C9 and C10 so that the receiver is optimized for operation at any data rate up to a maximum of 32 MBd. circuit artwork in Figure 7 is for the transmitter in Figure 3 and the receiver in Figure 5. Electronic copies of the Gerber files for the artwork shown in this application note can be obtained by using the Internet to download the printed circuit designs. Printed Circuit Artwork To obtain the artwork for the transmitter shown in Figure 3 and the receiver shown in Figure 5, download file from the following URL: http://www.avagotech.com The performance of transceivers that use Avago Technologies’ fiberoptic components are partially dependent on the layout of the printed circuit board on which the transceiver circuits are constructed. System designers are encouraged to embed the printed circuit designs provided in this application note to achieve the fiberoptic link performance described in Table 1. The printed circuit artwork in Figure 6 is for the transmitter in Figure 3 and the receiver in Figure 4. The printed To obtain the artwork for the transmitter shown in Figure 3 and the receiver shown in Figure 4, download file from the following URL: http://www.avagotech.com Equation 1 2 C6 = C7 = (3) (R6 + R7) [ Data Rate (Bd) ] Table 3 Receiver Fiber Type 6 HFBR-25X6Z – 650 nm 1 mm Plastic 200 mm HCS HFBR-24X6Z – 820 nm HFBR-23X6TZ – 1300 nm 62.5/125 mm 62.5/125 mm 7 1 2 5 U3B HFBR-24X6Z 8 4 1 7 3 6 2 R7 1.5 k C7 0.1mF C6 0.1mF 9 10 R6 2.4 k C5 0.1mF R5 4.7 8 R10 110 MMPQ3904 7 R8 51 R9 51 12 R12 1.5 k 11 R11 2.4 k 2 1 mm Plastic 200 mm HCS 4 62.5/125 mm HFBR-24X6Z – 820 nm (3) (R15 + R16) [ Data Rate (Bd) ] HFBR-25X6Z – 650 nm C9 = C10 = Fiber Type Receiver Table 4 Equation 2 R13 470 14 13 C8 0.1mF 2 R14 470 1 16 C10 C9 15 R16 270 R15 270 62.5/125 mm + 4 6 8 7 R18 68 k 5 U4 LT1016CS8 1 R17 68 k C14 0.1 mF L3 COILCRAFT 1008LS-122XKBC 2 3 C13 0.1 mF R21 2.2 k C11 0.1 mF C12 0.1 mF L2 COILCRAFT 1008LS-122XKBC HFBR-23X6TZ – 1300 nm MMPQ3904 3 5 Figure 5. Enhanced Fiberoptic Receiver for use with dc to 32 MBd Arbitary Duty Factor Date 5 U3A 3 HFBR-25X6Z 4 8 R4 4.7 6 + R20 240 R19 240 C15 10 mF TTL OUT (+) C16 0.1 mF TTL OUT (-) +5 V NOISY HOST SYSTEM POWER Figure 6a. Top Overlay Figure 6b. Top Layer Figure 6c. Mid layer Figure 6d. Mid Layer Figure 6e. Bottom Layer Figure 6f. Bottom Layer TX FIGURE 3 WARNING: DO NOT USE PHOTOCOPIES OR FAX COPIES OF THIS ARTWORK TO FEBRICATE PRINTED CIRCUITS. N_GND N_V CC TTL_IN Rx GND J1 RX FIGURE 4 Rx GND N_GND N_Vcc TTL_OUT+ TTL_OUTÐ 9 8 7 6 5 4 3 2 1 CON9 Figure 6g. Transmitter 1 Schematic Figure 6. Printed Circuit Artwork for Transmitter shown in Figure 3 and Reciever in Figure 4 8 Figure 7a. Top Overlay Figure 7b. Top Layer Figure 7c. Mid Layer 2 Figure 7d. Mid layer 3 Figure 7e. Bottom Layer Figure 7f. Bottom Overlay TX FIGURE 3 TX WARNING: DO NOT USE PHOTOCOPIES OR FAX COPIES OF THIS ARTWORK TO FEBRICATE PRINTED CIRCUITS. N_GND N_VCC TTL_IN Rx GND J1 RX FIGURE 5 RX Rx GND N_GND N_Vcc TTL_OUT+ TTL_OUTÐ 9 8 7 6 5 4 3 2 1 CON9 Figure 7g. Transmitter 2 Schematic Figure 7. Printed Circuit Artwork for Transmitter in Figure 3 and Receiver in Figure 5 9 Error Rates and Noise Immunity 10 usually the host system’s +5 V power supply. The host system’s +5 volt supply normally powers the fiberoptic receiver, the fiberoptic transmitter and an entire system comprised of relatively noisy digital circuits. The simple and inexpensive power supply filters recommended in this publication have been proven to work in a wide range of system applications. The power-supply filters recommended in this application note are normally sufficient to protect the fiberoptic receiver from very noisy host systems, but in extremely noisy applications additional power supply filtering could be needed. Parts List The TTL-compatible fiberoptic transceivers recommended in this publication are very simple and inexpensive, so only a few external components are needed. Complete parts lists for the circuits recommended in this application note are provided in Table 5 and Table 6. The parts listed in Table 5 are for the transmitter in Figure 3 and the receiver in Figure 4. The parts listed in Table 6 are for the transmitter in Figure 3 and the receiver in Figure 5. All of the components described in the part lists are compatible with the printed circuit artworks shown in Figure 6 and Figure 7, thus minimizing the design time and resources needed to use the low cost fiberoptic transceivers shown in the application note. 16 THRESHOLD-TO-NOISE RATIO - (Vp-p/VRMS) The probability that a fiberoptic link will make an error is related to the receiver’s own internal random noise and its ability to reject noise originating from the system in which it is installed. The total noise present in any fiberoptic receiver is normally the sum of the PIN diode preamplifier’s noise and the host system’s electrical noise. The amount of hysteresis applied to the comparator determines the minimum signal amplitude (also known as minimum signal threshold level) at which the receiver can reliably detect data. The ratio between the comparator’s switching threshold (also known as hysteresis) and the receiver’s noise also has a dramatic impact on probability of error. Small increases in the comparator’s threshold-to-noise ratio result in a very sharp reduction in the probability of error. Figure 8 shows that the receiver’s probability of error is reduced by six orders of magnitude from (1x10-9 to 1x10-15) when the receiver’s threshold-tonoise ratio improves from 12:1 to 15.8:1. At any fixed temperature the total value of the receiver’s random noise plus the host system’s noise can be assumed to be a constant. So the most obvious way to reduce the probability of error is to increase the comparator’s hysteresis and increase the amplitude of the optical signal applied to the receiver. A less obvious but better technique for lowering the error rate is to improve the receiver’s ability to reject electrical noise from the system in which it resides. The fiberoptic receivers recommended in this application note have sufficient noise immunity to be used in most systems without electrostatic shielding. The Avago Technologies PIN diode pre-amps, which are used in the receiver’s first stage, are small hybrid circuits, and these small hybrid components do not function as particularly effective antennas. For extremely noisy applications, Avago Technologies offers PIN diode pre-amps in electrically conductive plastic or all metal packages. Avago Technologies manufactures a wide range of conductive and non-conductive fiberoptic components that mate with various industry-standard fiberoptic connectors. However, the overwhelming majority of the fiberoptic applications successfully implemented with Avago Technologies’ fiberoptic components have not required conductive plastic or metal receiver housings. The most insidious and the most overlooked source of noise is 14 12 10 8 6 1E-3 1E-5 1E-7 1E-9 1E-11 BIT-ERROR RATIO - (BER) 1E-13 1E-15 Figure 8. Receiver Threshold-to-Noise Ratio vs. Probability of Error (aka BER) Conclusion The complete TTL-compatible fiberoptic transceiver solutions provided in this publication can be used to improve the noise immunity of existing data communication systems that use protocols originally developed for use with copper wire. When fiberoptic media is used in place of conventional copper wire, it is possible to build new communication systems that are immune to large noise transients caused by utility power switch gear, motor drives or high voltage power supplies. Furthermore the non-conductive cables used in optical communication links have an intrinsically higher probability of surviving lightning strikes than copper wire alternatives. The optical data communication solutions shown in this application note are also capable of sending highspeed 32 MBd data over long distances that would be impractical with copper wire cables. System designers can quickly develop noise-immune communication links with minimal engineering costs by embedding the complete fiberoptic solution shown in this application note. Table 5. Parts List for the Transmitter in Figure 3 and Receiver in Figure 4 Designator Part Type Description Footprint Material Part Number Quantity Vendor 1 C1 C5 C8 C9 C11 C13 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor 805 X75 or better C0805X7R500104KNE 6 Venkel C6 C7 Determined Capacitor by Equation 1 Capacitor 805 805 NPO/COG NPO/COG 1 1 Venkel C2 C10 C12 10 mF 10 mF 10 mF Capacitor Capacitor Capacitor B Tantalum, 10V 3 Venkel C3 See Table 2 Capacitor 805 NPO/COG 1 Venkel U1 I.C. Nand Gate S014 74ACTQ00 1 Fairchild U2 Fiberoptic Transmitter See Table 2 HFBR-1XXXZ 1 Avago Technologies U3 Fiberoptic Receiver See Table 4 HFBR-2XXXZ 1 Avago Technologies U4 LT1016 IC, comparator S08 LT1016CS8 1 Linear Tech L1 CB70-1812 Inductor HF30ACB453215 1 TDK L2 L3 1.2 mH Inductor 10% 1008LS-122XKBC 2 Coilcraft R4 R5 4.7 W 4.7 W Resistor Resistor 805 5% CR080510W4R7JT 2 Venkel R1 See Table 2 Resistor 805 1% 1 Venkel R2 See Table 2 Resistor 805 1% 1 Venkel R3 See Table 2 Resistor 805 1% 1 Venkel R6 R7 270 W 270 W Resistor 805 5% CR080510W271JT 2 Venkel R8 R9 120 kW 120 kW Resistor 805 5% CR080510W241JT 2 Venkel R10 R11 240 W 240 W Resistor 805 5% CR080510W241JT 2 Venkel R12 2.2 kW Resistor 805 5% CR080510W222JT 1 Venkel 343B 9 J1 11 Pins 1812 TA010TCM106MBN McKenzie Table 6. Parts List for the Transmitter in Figure 3 and Receiver in Figure 5 Designator Part Type Description Footprint Material Part Number Quantity Vendor 1 C1 C6 C7 C8 C11 C12 C14 C16 C9 C10 C2 C13 C15 C3 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF Determined by Equation 2 10 mF 10 mF 10 mF See Table 2 Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor 805 X7R or Better C0805X7R500104KNE 8 Venkel 805 805 B NPO/COG NPO/COG Tantalum, 10 V TA010TCM106MBN 1 1 3 Venkel Venkel Venkel 805 NPO/COG 1 Venkel U1 I.C. Nand Gate S014 74ACTQ00 1 Fairchild U2 Fiberoptic Transitter See Table 2 HFBR-1XXXZ 1 U3 Fiberoptic Receiver See Table 4 HFBR-2XXXZ 1 Avago Technologies U4 LT1016 S08 LT1016CS8 1 Linear Tech U5 Quad NPN IC, comparator Transistor S016 MMPQ3904 1 Motorola L1 CB70-1812 Inductor 1812 HF30ACB453215 1 TDK L2 L3 R4 R5 R1 1.2 mH Inductor 10% 108LS-122XKBC 2 Coilcraft 4.7 W 4.7 W See Table 2 Resistor Resistor Resistor 805 5% CR080510W4R7JT 2 Venkel 805 1% 1 Venkel R2 See Table 2 Resistor 805 1% 1 Venkel R3 See Table 2 Resistor 805 1% 1 Venkel R6 R11 R7 R12 R8 R9 R10 2.4 kW 2.4 kW 1.5 kW 1.5 kW 51 W 51 W 110 W Resistor 805 5% CR080510W242JT 2 Venkel Resistor 805 5% CR080510W152JT 2 Venkel Resistor 805 5% CR080510W510JT 2 Venkel Resistor 805 5% CR080510W111JT 1 Venkel R13 R14 R15 R16 R17 R18 R19 R20 R21 470 W 470 W 270 W 270 W 68 kW 68 kW 240 W 240 W 2.2 kW Resistor 805 5% CR080510W471JT 2 Venkel Resistor 805 5% CR080510W271JT 2 Venkel Resistor 805 5% CR080510W163JT 2 Venkel Resistor 805 5% CR080510W241JT 2 Venkel Resistor 805 5% CR080510W222JT 1 Venkel 343B 9 McKenzie J1 Pins For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright © 2005-2010 Avago Technologies. All rights reserved. AV02-0723EN - July 22, 2010