5
HFBR-1312T Transmitter Electrical/Optical Characteristics
0° C to 70° C unless otherwise speci ed
Parameter Symbol Min. Typ.
[1]
Max. Unit Condition Ref.
Forward Voltage V
F
1.1 1.4 1.7 V I
F
= 75 mA Fig. 3
1.5 I
F
= 100 mA
Forward Voltage Temperature
Coe cient
V
F
/T
-1.5 mV/°C I
F
= 75 – 100 mA
Reverse Input Voltage V
R
14 V
I
R
= 100 A
Center Emission Wavelength
C
1270 1300 1370 nm
Full Width Half Maximum FWHM 130 185 nm
Diode Capacitance C
T
16 pF V
F
= 0 V, f = 1 MHz
Optical Power Temperature
Coe cient
P
T
/T
-0.03 dB/°C I
F
= 75 - 100 mA DC
Thermal Resistance
JA
260 °C/W Note 2
HFBR-1312T Transmitter Output Optical Power and Dynamic Characteristics
Parameter Symbol Min. Typ.
[1]
Max. Unit
Condition
Ref.T
A
I
F, peak
Peak Power
62.5/125 m
NA = 0.275
P
T62
-16.0 -14.0 -12.5 dBm 25° C 75 mA Notes 3, 4, 5
Fig. 4
-17.5 -11.5 0-70° C 75 mA
-15.5 -13.5 -12.0 25° C 100 mA
-17.0 -11.0 0-70° C 100 mA
Peak Power
50/125 m
NA = 0.20
P
T50
-19.5 -17.0 -14.5 dBm 25° C 75 mA Notes 3, 4, 5
Fig. 4
-21.0 -13.5 0-70° C 75 mA
-19.0 -16.5 -14.0 25° C 100 mA
-20.5 -13.0 0-70° C 100 mA
Optical Overshoot OS 5 10 % 0-70° C 75 mA Note 6
Fig. 5
Rise Time t
r
1.8 4.0 ns 0-70° C 75 mA Note 7
Fig. 5
Fall Time t
f
2.2 4.0 ns 0-70° C 75 mA Note 7
Fig. 5
Notes:
1. Typical data are at T
A
= 25° C.
2. Thermal resistance is measured with the transmitter coupled to a connector assembly and mounted on a printed circuit board;
JC
<
JA
.
3. Optical power is measured with a large area detector at the end of 1 meter of mode stripped cable, with an ST* precision ceramic ferrule
(MILSTD-83522/13), which approximates a standard test connector. Average power measurements are made at 12.5 MHz with a 50% duty cycle
drive current of 0 to I
F,peak
; I
F,average
= I
F,peak
/2. Peak optical power is 3 dB higher than average optical power.
4. When changing from W to dBm, the optical power is referenced to 1 mW (1000 W). Optical power P(dBm) = 10*log[P(W)/1000W].
5. Fiber NA is measured at the end of 2 meters of mode stripped ber using the far- eld pattern. NA is de ned as the sine of the half angle, determined
at 5% of the peak intensity point. When using other manufacturer’s ber cable, results will vary due to di ering NA values and test methods.
6. Overshoot is measured as a percentage of the peak amplitude of the optical waveform to the 100% amplitude level. The 100% amplitude level is
determined at the end of a 40 ns pulse, 50% duty cycle. This will ensure that ringing and other noise sources have been eliminated.
7. Optical rise and fall times are measured from 10% to 90% with 62.5/125 m ber. LED response time with recommended test circuit (Figure 3) at
25 MHz, 50% duty cycle.
8. 2.0 mm from where leads enter case.
