HFBR-0528 Avago Technologies US Inc., HFBR-0528 Datasheet - Page 6

• Manufacturer Part Number: HFBR-0528
• Description: KIT EVAL FIBER OPTIC 10MBD
• Manufacturer: Avago Technologies US Inc.

Specifications of HFBR-0528

• Main Purpose: Interface, Fiber Optics
• Embedded: No
• Utilized Ic / Part: HFBR-1528, HFBR-2528
• Primary Attributes: 10MBd, Communication up to 50m using 1mm POF
• Secondary Attributes: Crimpless Connectors
• Silicon Core Number: HFBR-1528, HFBR-2528
• Kit Contents: TX/RX Mods, Cable, Pol Kit, SW, Pwr. Sup
• Silicon Family Name: Versatile Link
• Features: Fiber Optic Transmitter And Receiver
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 516-2144; HFBR-0528

Figure 9. Versatile Link Set-Up.
Figure 10. Fiber Optic Link Main Parameters.
1.2. Dynamic Range
An important link design con-sideration is the receiver’s
optical dynamic range, the difference between sensitiv-
ity ( P
words, the dynamic range specifies the minimum-to-
maximum link length. Exceeding the dynamic range of
the receiver may lead to an increase in PWD. The maxi-
mum allowed power level of the receiver specifies the
minimum link length needed to avoid overdrive condi-
tion. The maximum optical power that the HFBR-528Z
can launch, however, is well matched to the HFBR-2528Z
receiver’s overdrive characteristics. If the LED drive cir-
cuit recommended in the HFBR-528Z data sheet is
5510-10
used, the transmitter cannot over-drive the HFBR-2528Z
receiver even when the length of the fiber-optic cable is
virtually zero meters.
6
V cc
INPUT
1 µF
5510-9
0.1
µF
RL, min
HFBR-2528Z
Pr COUPLED
POWER
SPECIFICATION
HFBR-1528Z
Pt COUPLED
POWER
SPECIFICATION
DATA
RATE
) and overdrive conditions ( P
1/2 75451
R1
R2
TRANSMITTER (HFBR-1528Z)
E
TRANSMITTER
OUTPUT
POWER
O
1
2
3
4
FIBER
ATTENUATION
(dB/m)
PIN 5 & 8 SHOULD
BE CONNECTED
TO GROUND
INPUT COUPLING
LOSS
RL, max
8
5
LINK SPAN
) : in other
LINK DISTANCE
POWER INTO RECEIVER
200 µm HCS
1 mm POF
OUTPUT COUPLING LOSS
Equation III/1:
P
P
IL:
OPM : Optical power margin, which accounts for LED
α(max): Maximum attenuation of fiber (dB/m)
OR
T
RL, min
(min) : Minimum coupled power of transmitter (dBm)
IL(dB) = 20
l(max) =
P (T) = P (25) –
l(min) =
V (T) = V (25)
R1 =
T
F
: Sensitivity of the receiver (dBm)
O
E
Sum of insertion loss of feed-throughs (dB)
degradation, supply voltage variation, etc. (dB)
Vcc - Vce - V
T
•
POWER
BUDGET
Pt(max) - P
P (min) - P
I
F
log
F
T
RECEIVER (HFBR-2528Z)
a(min)
−
d1
d2
F
PIN 5 & 8 SHOULD
BE CONNECTED
5
8
TO GROUND
+ 20
∆
a(max)
∆
RL, max
∆
∆
RL, min
P
V
T
T
T
F
•
•
log
• (T – 25)
(T – 25)
(in m)
- IL - OPM
2
1
3
4
NA2
NA1
(m)
0.1 µF
2.7 OHM
OUTPUT
V cc