AFBR-24X8XZ AVAGO | Alldatasheet

Document overview

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Technical content

Features

  • RoHS-compliant
  • Work with Avago HFBR-14xxZ (820nm LED) transmitter
  • Data transmission at signal rates from DC up to 50 MBd
  • Receiver: Integrated PIN diode and digitalizing IC with CMOS/TTL output logic
  • Up to 2 km distance with Multimode Glass Fiber Cable
  • Operating temperature range of -40°C to +85°C
  • 3.3 V and 5 V supply voltage operation
  • RSSI output

Applications

  • Optical transmission from DC up to 50 MBd
  • Industrial control and factory automation
  • High voltage isolation
  • Elimination of ground loops
  • Reduces voltage transient susceptibility
  • Power substation automation

Description

The component is designed to provide cost effective, high performance fiber optic communication links for infor - mation systems and industrial applications with link dis - tances of up to 2 km. The receivers are directly compatible with popular “industry-standard” connectors: ST and SMA. They are designed for use with 50/125 μm, 62.5/125 μm, and 200 μm multimode fiber. AFBR-24x8xZ Available Part Numbers Part Number Description AFBR-2408Z Receiver with SMA port AFBR-2418Z Receiver with ST port AFBR-2418TZ Receiver with threaded ST port AFBR-2418MZ Receiver with metal ST port Link Length Data Rate (MBd) Max. Distance (m) Fiber Size (µm) Transmitter 50 900 50/125 HFBR-1414Z 50 2000 62.5/125 HFBR-1414Z 50 100 200 HFBR-1414Z Note: Verified with PRBS7 pattern using HFBR-1414Z transmitter, respecting its worst case LOP conditions but assuming a proper fiber connection (direct connection without add. connectors). Multiple or weak connections may reduce the achievable link length.

Package and Handling Information

Package Information

The receiver is housed in a low-cost, dual-inline package that is made of high strength, heat resistant, chemically resistant, and UL 94V-O flame retardant ULTEM® plastic (UL File #E121562). The receivers (suffix Z, TZ) are easily identified by the dark grey color connector port. A metal port option is also available (suffix MZ). The metal port op- tion components have an internal electrical connection between the metal port and the four grounding pins, as shown in the package outline drawing. Signal ground is separate from the four grounding pins to give flexibility in connecting the port to signal or chassis ground. The pack- age is designed for auto-insertion and wave soldering so it is ideal for high volume production applications. Handling and Design Information Each part comes with a protective port cap or plug cov - ering the optics. These caps/plugs will vary by port style. When soldering, it is advisable to leave the protective cap on the unit to keep the optics clean. Good system per - formance requires clean port optics and cable ferrules to avoid obstructing the optical path. Clean compressed air often is sufficient to remove particles of dirt; methanol on a cotton swab also works well. AFBR-24x8xZ Low-Cost 50 MBd Receiver The AFBR-24x8xZ fiber optic receiver is designed to oper- ate with the Avago Technologies HFBR-14xxZ fiber optic trans-mitters and multimode glass fiber cable. Consistent coupling into the receiver is assured by the optical system with lens. The receiver output is a digital CMOS/TTL signal. The AFBR-24x8xZ receiver contains an IC with integrated photodiode which directly converts the incoming opti - cal signal to a digital output signal without the requisite for additional external circuitry. Because of its integrated design, the receiver has very high EMC resistance. A wide receiver dynamic range and high sensitivity over tempera- ture is achievable. The data rate typically goes from DC to 50MBd. A monitor (RSSI) output, which delivers an output current proportional to the average incoming light power, is available. For an almost noise-free RSSI-signal smoothing compo - nents are recommended. A capacitor in parallel to the re - sistor on the RSSI output reduces potential high frequency signal parts. The use of a single 100 nF capacitor for signal smoothing is sufficient in most common applications, as shown in the Recommended Receiver Circuitry section. If this RSSI function is not required, the output pin can be left floating. The RSSI-signal is derived from internal con - trolling loops; therefore, the typical time constant of pure RSSI output current without an external filter can be up to 1 ms. This time constant also depends on the actual aver - age incoming light power. Absolute Maximum Ratings Parameter Symbol Min Max Unit Notes Storage Temperature TS -40 +85 °C Operating Temperature TA -40 +85 °C Supply Voltage VCC -0.3 5.5 V Maximum DC Output Current IO 10 mA Voltage at RSSI Output VRSSI -0.3 VCC+0.3 V Lead Soldering Cycle - Temp TSOLD 260 °C 1.6 mm below seating plane Lead Soldering Cycle - Time tSOLD 10 s

  1. Typical data are at 25° C, VCC = 5.0 V.
  2. In recommended receiver circuit, with an optical signal from the recommended transmitter circuit, transmitted via 62.5/125μm MM fiber.
  3. Condition for sensitivity limit: Total Jitter ≤ 0.6 UI (unit intervals). The sensitivity was characterized by usage of transmitter HFBR-1414Z, an optical

specified in the table “Link Length” on page 1, may reduce the sensitivity.

  1. Verified with a PRBS7 signal with mark ratio = ½ running at 50 MBd (in this case, the optical input average power levels are 3dB less than the

specified peak power levels).

  1. Verified with an external resistor RRSSI=2 kΩ
  2. If the data rate was below 1 MBd, the pulse width distortion would be equal to the pulse width distortion of the 1st to 3rd pulses for higher data
  3. The threshold of the 1st pulse of a data sequence is difficult to adjust and therefore the pulse width distortion up to the 3rd pulse is higher than
  4. The AFBR-24x8xZ is an inverting receiver, hence a logic high at the input (light on) causes a logic low at the electrical data output. Respectively, a

rising input edge causes a falling output edge and vice versa. the responsivity, 2 kΩ was used. The lower the power, the higher the resistor value should be. Do not, however, override the max. limit of VRSSI. Figure 2. Typical Responsivity vs. TemperatureFigure 1. Typical RSSI output voltage across RRSSI = 2 kΩ

Recommended Transmitter Driver Circuitry for AFBR-24x8xZ receivers using HFBR-14x4xxZ R1 R2 R3 C3 33 Ω 33 Ω 270 Ω 75 pF Monitoring PHY 10 µF 1 µH GND 100 nF GND GND GND GND RXVCC VCC 3 DO 2 GND 7 RSSI 6 AFBR-24x8xZ RRSSI L1 C2 VRSSI DO LL Rx 100 nF GND Data 74ACTQ00MTC GND GND TXVCC = 5.0V GND GND HFBR-14x4xxZ AN22 AN77 CAT3 AN66 IC1A IC1B IC1C IC1D C1 C2 LL Tx 10 µF 100 nF Pin Description Pin Name Function Notes

1 NC NC 1

2 /DO Data Out inverted (CMOS/TTL logic) 2 3 VCC 5V/3.3V Supply Voltage

4 NC NC 1

5 NC NC 1

6 RSSI Received Signal Strength Indicator Output

7 GND Ground

8 NC NC 1

  1. Pins 1, 4, 5 and 8 are connected together internally. The metal port option components (suffix MZ) have an internal electrical connection between the metal port and the four grounding pins 2. The data output provides an inverted signal, thus an electrical low in case of light on and vice versa. PIN NO. 1 INDICATOR BOTTOM VIEW

Mechanical Dimensions – SMA Port AFBR-2408Z Mechanical Dimensions – ST Port AFBR-2418Z 6.35 (0.25) 2.54 (0.10) 3.81 (0.15) 6.4 (0.25) DIA. 12.7 (0.50) 12.7 (0.50) 22.2 (0.87) 5.1 (0.20) 10.2 (0.40)3.6 (0.14) 1.27 (0.05) 2.54 (0.10) PINS 1,4,5,8 0.51 X 0.38 (0.020 X 0.015) PINS 2,3,6,7 0.46 (0.018) DIA. 1 3 2 4 PIN NO. 1 INDICATOR 1/4 - 36 UNS 2A THREAD COUNTRY AVAGO RX YYWW AFBR-2408Z Note: Dimensions are in millimeters (inches). Note: Dimensions are in millimeters (inches). 8.3 (0.32) 6.35 (0.25) 12.7 (0.50) 27.2 (1.07) 5.1 (0.20) 10.2 (0.40)3.6 (0.14) 1.27 (0.05) 2.54 (0.10) PINS 1,4,5,8 0.51 × 0.38 (0.020 × 0.015) PINS 2,3,6,7 0.46 (0.018) DIA. 1 3 2 4 PIN NO. 1 INDICATOR 2.54 (0.10) 3.81 (0.15) DIA. 12.7 (0.50) 7.0 (0.28) COUNTRY AVAGO RX YYWW AFBR-2418Z 4.9 (0.193) MAX.

5.1 (0.20) 3/8 - 32 UNEF - 2A 8.4 (0.33) 6.35 (0.25) 12.7 (0.50) 27.2 (1.07) 5.1 (0.20) 10.2 (0.40)3.6 (0.14) 1.27 (0.05) 2.54 (0.10) PINS 1,4,5,8 0.51 × 0.38 (0.020 × 0.015) PINS 2,3,6,7 0.46 (0.018) DIA. 1 3 2 4 PIN NO. 1 INDICATOR 2.54 (0.10) 3.81 (0.15) DIA. 12.7 (0.50) 7.1 (0.28) DIA. 7.6 (0.30) 4.9 (0.193) COUNTRY AVAGO RX YYWW AFBR-2418TZ MAX. 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 © 2005-2013 Avago Technologies. All rights reserved. AV02-4303EN - October 11, 2013 Mechanical Dimensions – Threaded ST Port AFBR-2418TZ Mechanical Dimensions – Metal ST Port AFBR-2418MZ PIN NO. 1 INDICATOR PINS 1,4,5,8 0.51 × 0.38 (0.020 × 0.015) PINS 2,3,6,7 0.46 DIA. (0.018) DIA. COUNTRY AVAGO RX YYWW AFBR-2418MZ 4.9 (0.193) 8.4 (0.33) 6.35 (0.25) 5.1(0.20) 10.2 (0.40)3.6 (0.14) 1.27 (0.05) 2.54 (0.10) 12.7 (0.50) 27.2 (1.07) 12.7 (0.50) 2.54 (0.10) 3.81 (0.15) DIA.7.0 (0.28) 1 3 2 4 MAX. Note: Dimensions are in millimeters (inches). Note: Dimensions are in millimeters (inches).