HFD3904 Next Generation 125 MHz PIN Plus Preamp. Analog Receiver FEATURES • Industry standard ST¨ fiber connector • High speed operation Rise/Fall times are 3.0 ns typical • Low pulse-width distortion over a wide range of inputs due to 23 dB typical dynamic range • Wide variety of cable options, operates with 50/125, 62.5/125, and 100/140 µm cables • Threaded metal barring and housing • Wave solderable • Metal package provides enhanced durability and EMI protection over plastic packages • ST-LP2 package FIBER301.TIF DESCRIPTION Next Generation detectors are designed for use in IEEE 802.3 Ethernet and IEEE 802.5J Token Ring applications such as repeaters, bridges, hubs, routers, switches and gateways. This inexpensive, high speed analog fiber optic receiver is intended for use in local area networks (LANs) where data rates up to 125 Mbits/second are needed, and could be used as a low cost alternative to 1300 nm components. The hybrid bipolar fiber optic receiver contains a silicon PIN photodiode for high speed operation and a preamplifier integrated circuit for excellent noise immunity. OUTLINE DIMENSIONS in inches (mm) The preamplifier stage of the Next Generation detector converts the current output of the PIN photodiode to a voltage and amplifies it. The output is a linear voltage proportional to the optical input over an input range of less than 1.0 µW to 175 µW peak (1.313 V typical output voltage swing) providing a dynamic operating range of 23 dB with very low pulse-width distortion. The receivers are designed to operate on the ECL standard of -5.2 volts and have very good Power Supply Rejection Ratio (typically 20 dB at 10 MHz), making them highly immune to noise pickup. They can also be operated with a +5 volt supply although some PSRR performance will be sacrificed at less than 1 MHz. The receiver output is a proportional analog voltage, providing cost-effective design flexibility. The circuit design can be tailored to a particular application, using inexpensive external components to perform the conversion to the needed logic levels. This allows for optimized design, making maximum use of the power budget for a given data rate/transmission distance configuration. Honeywell reserves the right to make changes in order to improve design and supply the best products possible. ODIM_209.cdr Pinout 1. Output 2. Våå 3. VÙÙ 4. Våå ST is a registered trademark of AT & T. The connector can act as a shield. For optimum EMI shielding, stake pins should be connected to chassis ground. Signal ground and chassis ground should be bridged with a high Q 0.01µF capacitor at the fiber optic component. h 431 HFD3904 Next Generation 125 MHz PIN Plus Preamp. Analog Receiver DESCRIPTION (continued) Next generation detectors are designed to be low cost alternatives to other 125 MHz receivers. They are manufactured with fewer internal components than the previous 125 MHz receivers, and are pin for pin compatible with existing 125 MHz receivers. The metal package provides enhanced durability and EMI shielding over plastic packages. 432 h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HFD3904 Next Generation 125 MHz PIN Plus Preamp. Analog Receiver ELECTRO-OPTICAL CHARACTERISTICS (Våå = -5.2 V, Tà= -40¡C to +85¡C unless otherwise specified) PARAMETER SYMBOL Responsivity Tà -25¡C Over Temp. Range Input Power Tà=25¡C MIN TYP [À] MAX R 5.3 4.5 7.5 Bandwidth RMS Noise Output Voltage 9.6 11.5 PÛÜ (peak) -3.6 9 -7.6 175 -8.2 150 -2.8 15 PWD 3.0 3.0 0.2 4.5 6.3 2.5 BW VÜÞ 125 0.52 0.58 Over Temp. Range DC Output Voltage [Â] Power Supply Current Rise/Fall Time Tà=25¡C Over Temp. Range Pulse Width Distortion [Ã] UNITS mV/µW VÏ°Ù IÙÙ tß/t¸ -4.2 0.70 Output PSRR [Ä] Output Overshoot Output Resistance RMS Input Noise Power [Å] PÜÛ 20 10 20 -41.3 74 13 -41.0 79 dBm µW dBm µW V mA ns ns MHz mV mV mV dB % í dBm nW TEST CONDITIONS [Á] f = 50MHz, PÛÜ = 100µW peak, æ = 850 nm, 62.5 µm core fiber f = 50 MHz, æ = 850 nm PWD –2.5 ns PÛÜ – 0.1 µW RÚÞà° = 0 f = 10MHz, PÛÜ = 100µW peak æ = 850 nm f = 50 MHz, PÛÜ = 150 µm peak, æ = 850 nm æ = 850 nm, R = 0.707 R max. PÛÜ = 0 µW, 75 MHz, 3 pole Bessel filter on output No filter on output f = 10 MHz PÛÜ = 10 µW f = 50 MHz PÛÜ = 0 µW, 75 MHz, 3 pole Bessel filter on output Notes 1. Typical specifications are for operations at Tà= 25¡C. 2. Output pin should be AC coupled to a 511 ì load. Load capacitance <5 pf (See circuit diagram). 3. Quiescent output voltage VÞ°Ù = VÙÙ - Vout. Dynamic output voltage swing is below the quiescent output voltage (VÞ= VÞ°Ù+ R x PÛÜ). 4. Measured at the 50% amplitude point on the output waveform. 5. Output PSRR is defined as 20 log (Vsupply Ripple/Vout Ripple). 6. Input referred noise is calculated as PÜÛ = VÜÞ/R ABSOLUTE MAXIMUM RATINGS (Tcase = 25¡C unless otherwise noted) RECOMMENDED OPERATING CONDITIONS Supply voltage (VÙÙ - Våå) -0.5 to -6.0 V Storage temperature -55 to +85¡C Optical signal input 1.0 to 125 µW Operating temperature -40 to +85¡C Operating temperature 0 to 70¡C Lead solder temperature 260¡C, 10 s Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Honeywell reserves the right to make changes in order to improve design and supply the best products possible. h 433 HFD3904 Next Generation 125 MHz PIN Plus Preamp. Analog Receiver ORDER GUIDE Description Catalog Listing Threaded metal barrel and housing HFD3904-202 CAUTION The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation to equipment, take normal ESD precautions when handling this product. CIRCUIT DIAGRAM SWITCHING WAVEFORM FIBER006.SCH Fig. 1 Spectral Responsivity FIBER213.CIR Fig. 2 FIBER102.GRA Pulse Width Distortion vs Optical Input FIBER066.GRA Power All Performance Curves Show Typical Values 434 h Honeywell reserves the right to make changes in order to improve design and supply the best products possible.