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HFBR-1528中文资料

10 Megabaud Versatile Link Fiber Optic Transmitter

and Receiver for 1 mm POF and 200 μm HCS ?Technical Data

HFBR-0508 Series

HFBR-1528 Transmitter HFBR-2528 Receiver

Features

? Data Transmission at Signal Rates of dc to 10 MBd

? Up to 50 Meters Distances with 1 mm Plastic Optical Fiber (POF)

? Up to 500 Meters Distances with 200 μm Hard Clad Silica (HCS ?)

? Wide Dynamic Range

Receiver Allows Operation from Zero to Maximum Link Distance with a Single

Transmitter Drive Current ? Link Distances Specified for Variations in Temperature,Power Supply, and Fiber Attenuation

? DC Coupled Receiver with CMOS/TTL Output for Easy Designs: No Data Encoding or Digitizing Circuitry Required

? Pulse Width Distortion Controlled to Limit

Distortion from Low Duty Cycle or Burst Mode Data ?High Noise Immunity

? Compatible with Agilent’s Versatile Link Family of Connectors, for Easy Termination of Fiber

Applications

? Industrial Control and Factory Automation ? Serial Field Buses

? Intra-System Links; Board-to-Board, Rack-to-Rack

? Extension of RS-232, RS-485? Elimination of Ground Loops ? High Voltage Isolation

? Reduces Voltage Transient Susceptibility

Description

The HFBR-0508 Series consists of a fiber-optic transmitter and receiver operating at a 650 nm wavelength (red). The HFBR-1528 transmitter is an LED in a low cost plastic housing designed to efficiently couple power into 200 μm diameter HCS and 1mm diameter POF. The HFBR-2528receiver incorporates a PIN detec-tor and digital output IC compat-ible with CMOS and TTL logic families.

HFBR-0508 links operate from DC to 10 MBd at distances up to 50 meters with 1mm POF and up

CAUTION:. It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD.

HCS ?

is a registered trademark of SpecTran Corporation.

to 500 meters with 200 μm HCS ?.No minimum link distances are required when using recom-mended circuits, simplifying design.

Versatile Link components can be interlocked (N-plexed together) to minimize space and to provide dual connections with the duplex connectors. Up to eight packages can be interlocked and inserted into a printed circuit board.POF and HCS are available in pre-connectored lengths or can be easily field-terminated. A single transmitter drive current for POF and HCS allows both fibers to be used with a single design.

HFBR-0508 Series 10 MBd Data Link

Typical Link Performance, T A = +25°C

Parameter Symbol Typ.[1]Unit Condition Note Signaling Rate f S15Mb/s NRZ2 Link Distance with Extra Low Loss POF Cable100m10 MBd2, 3, 5 Link Distance with 200 μm HCS Cable900m10 MBd2, 4, 5

Specified Link Performance, T A = -20° to +85°C, DC to 10 MBd, unless otherwise noted.

Absolute Maximum Ratings

Recommended Operating Conditions

Parameter Symbol Min.Max.Unit Condition Note Ambient Temperature T A-20+85°C

Power Supply Voltage V CC 4.75 5.25V<100 mV p-p Noise Transmitter Peak Forward Current I F,PK2090mA6 Transmitter Average Forward Current I F,AV60mA

Fanout (7400 Series TTL)N1

Notes:

1. Typical data at +25°C, V CC = 5 V.

2. With recommended transmitter and receiver application circuits (60 mA nominal drive current).

3. POF is HFBR-R/EXXYYY plastic (1 mm) optical fiber. Worst case attenuation used (0.23 dB/m from -40°C to +85°C at 660 nm).

4. HCS is HFBR-H/VXXYYY hard clad silica (200/230 μm) fiber. Worst case attenuation is used (10 dB/km from 0°C to +70°C and

12dB/km from -40°C to +85°C at 650 nm).

5. BER ≤ 10-9, 223 - 1 PRBS NRZ 10 MBd.

6. For I F,PK > 60 mA, the duty factor must maintain I F,AV≤ 60 mA and pulse with ≤ 1 μs.

7. 1.6 mm below seating plane.

Electrical and Optical Characteristics: T A = -40° to +85°C unless otherwise noted.

Notes:

1. Typical data are at 25°C.

2. Optical power measured at the end of 0.5 meters of 1 mm diameter plastic or 200 μm diameter hard clad silica fiber with a large area detector.

3. Minimum and maximum values for P T over temperature are based on a fixed drive current. The recommended drive circuit has temperature compensation which reduces the variation in P T over temperature; refer to Figures 4 and 6.

4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-1528.

5. Pins 5 and 8 are for mounting and retaining purposes, but are electrically connected; pins 3 and 4 are electrically isolated. It is recommended that pins 3, 4, 5 and 8 all be connected to ground to reduce coupling of electrical noise.

6. Refer to the “Plastic Optical Fiber and HCS Fiber Cable and Connectors for Versatile Link” Technical Data Sheet for cable connector options for 1 mm plastic and 200 μm HCS optical fiber.

plastic optical fiber (POF) and Hard Clad Silica (HCS) fiber. This transmitter can be operated up to 10 MBd using a simple driver circuit. The HFBR-1528 is com-patible with all Versatile Link connectors.

SEE NOTE 5

HFBR-1528 Transmitter, Top View

HFBR-1528 Transmitter

The HFBR-1528 transmitter incorporates a 650 nm LED in a light gray, nonconductive plastic housing. The high light output power enables the use of both

WARNING: WHEN VIEWED UNDER SOME CONDITIONS, THE OPTICAL PORT MAY EXPOSE THE EYE BEYOND THE MAXIMUM PERMISSIBLE EXPOSURE RECOMMENDED IN ANSI Z136.2, 1993. UNDER MOST VIEWING CONDITIONS THERE IS NO EYE HAZARD.

Figure 6. Recommended Transmitter Drive Circuit (I F,on = 60 mA Nominal at T A = 25°C).

Figure 5. Typical Optical Pulse Width Distortion vs.

Temperature and Power Supply Voltage (in Recommended Drive Circuit).

Figure 4. Typical Normalized Optical Power vs. Temperature (in Recommended Drive Circuit).

Figure 3. Typical Normalized Optical Spectra.

V F – F O R W A R D V O L T A G E – V

I F,DC – TRANSMITTER DRIVE CURRENT – mA

Figure 2. Typical Normalized Optical Power vs. Drive Current.

Figure 1. Typical Forward Voltage vs. Drive Current.

N O R M A L I Z E D S P E C T R A L O U T P U T P O W E R

WAVELENGTH (nm)

N O R M A L I Z E D O U T P U T P O W E R

TEMPERATURE – °C

P T – N O R M A L I Z E D O U T P U T

P O W E R – d B

I F,DC – TRANSMITTER DRIVE CURRENT – mA

P W D – n s

TEMPERATURE – °C

HFBR-2528 Receiver

The HFBR-2528 receiver consists of a silicon PIN photodiode and digitizing IC to produce a logic compatible output. The IC includes a unique circuit to

correct the pulse width distortion of the first bit after a long idle period. This enables operation from DC to 10 MBd with low PWD for arbitrary data patterns.The receiver output is a “push-pull” stage compatible with TTL and CMOS logic. The receiver housing is a dark, conductive plastic, compatible with all Versatile Link connectors.

Electrical and Optical Characteristics: T A = -20° to +85°C, 4.75 V < V CC < 5.25 V, unless

otherwise noted.

Parameter

Symbol Min.Typ .[1]Max.Unit T A (°C)Condition Note Fig.Peak POF Sensitivity:P RL,min -23.0-21.0

dBm +25 1 mm POF,2,62,4Minimum Input for -20.00 to +70|PWD| < 30 ns Logic “0”

-19.5

-20 to +85Peak POF Overdrive

P RL,max +1.0+5.0

dBm +25 1 mm POF,

2,3,1,2,Limit:Maximum +0.00 to +70|PWD| < 30 ns 63

Input for Logic “0”-1.0

-20 to +85

Peak POF Off State P RH,max -42dBm 1 mm POF 2,6,Limit: Maximum 8Input for Logic “1”Peak HCS

P RL,min -25.0-23.0dBm +25200 μm HCS,2,6Sensitivity: Minimum -22.00 to +70|PWD| < 30 ns Input for Logic “0”-21.5

-20 to +85Peak HCS Overdrive P RL,max -1.0+3.0

dBm +25200 μm HCS,2,3,Limit: Maximum -2.00 to +70|PWD| < 30 ns 6Input for Logic “0”-3.0

-20 to +85Peak HCS Off State P RH,max -44dBm 200 μm HCS 2,6,Limit: Maximum 8

Input for Logic “1”Supply Current I CC 2745mA V O = Open High Level Output V OH 4.2

4.7V I O = -40 μA Voltage

Low Level Output V OL 0.220.4V I O = +1.6 mA Voltage

Output Rise Time t r 1230ns C L = 10 pF 6Output Fall Time t f 1030

ns C L = 10 pF

6Thermal Resistance,θjc 200°C/W 4Junction to Case Electric Field E MAX 8kV/m Near Field,5Immunity Electrical Field Source Power Supply PSNI

0.1

0.4

V pp

Sine Wave 6Noise Immunity

DC - 10 MHz

Notes:

1. Typical data are at +25°C, V CC = 5.0 V .

2. Input power levels are for peak (not average) optical input levels. For 50% duty cycle data, peak optical power is twice the average optical power.

3. Receiver overdrive (P RL,max ) is specified as the limit where |PWD| will not exceed 30 ns. The receiver will be in the correct state (logic “0”) for optical powers above P RL,max . However, it may not meet a 30% symbol period PWD if the overdrive limit is exceeded.Refer to Figure 2 for PWD performance at high received optical powers.

4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-2528.

5. Pins 5 and 8 are electrically connected to the conductive housing and are also used for mounting and retaining purposes. It is required that pins 5 and 8 be connected to ground to maintain conductive housing shield effectiveness.

6. In recommended receiver circuit, with an optical signal from the recommended transmitter circuit.

7. Pin 4 is electrically isolated internally. Pin 4 may be externally connected to pin 1 for board layout compatibility with HFBR-25X1,HFBR-25X2 and HFBR-25X4. Otherwise it is recommended pin 4 be grounded as in Figure 5.

8. BER ≤ 10E-9, includes a 10.8 dB margin below the receiver switching threshold level (signal to noise ratio = 12).

HFBR-2528 Receiver, Top View

NO CONNECT V CC GROUND V O

SEE NOTES 5,7

Figure 5. Recommended Receiver Application Circuit.

Figure 4. Typical POF Receiver Pulse Width Distortion vs.Power Supply Voltage at Low Optical Power, (-21 dBm,pk,10 MBd).

Figure 3. Typical POF Receiver Pulse Width Distortion vs. Power Supply Voltage at High Optical Power (0dBm,pk, 10 MBd).R E C E I V E D P W D – n s

-22

3010-30P RL – RECEIVER OPTICAL INPUT POWER – dBm

-18200-2-10-20-14-10-62

V CC

DATA

HFBR-2528R E C E I V

E D P O W E R – d B m

TEMPERATURE – °C

Figure 2. Typical POF Receiver Pulse Width Distortion vs.Optical Power at 10 MBd.

Figure 1. Typical POF Receiver Overdrive, P RL,max , at 10MBd, vs. Temperature and Power Supply Voltage.P W D – n s

4.7169

V CC – VOLTS

4.8

5.5

5.0 5.1 5.34.9 5.2 5.4131211

15P W D – n s

4.7-13

-18

V CC – VOLTS

4.8-14

-15

5.5

-16

-17

5.0 5.1 5.34.9 5.2 5.4

TOP VIEW

Figure 6. HFBR-2528 Receiver Block Diagram.

Versatile Link Mechanical Dimensions

Versatile Link Printed Circuit Board Layout Dimensions

TRANSMITTER

HFBR-1528RECEIVER HFBR-25281 2 3 4 5 8

ANODE CATHODE GROUND* GROUND* GROUND** GROUND**

SIGNAL, V O GROUND V CC (+5 V) GROUND* GROUND** GROUND**

PIN NO.* NO INTERNAL CONNECTION,

GROUND CONNECTION RECOMMENDED. ** PINS 5 AND 8 CONNECTED INTERNALLY TO EACH OTHER.

ELECTRICAL PIN FUNCTIONS 3 V CC

8 GROUND 1 V O, DATA

2 GROUND 5 GROUND

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Data subject to change.

5963-3591E (11/99)