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400 Hot Springs Road, Carson City NV 89706 (775) 883-0820 Fax (775) 883-0827 www.hytek.com
HY6410
Laser Diode Driver
Pin Descriptions
> –5.2V INPUT:
> GROUND:
> –V:
> REF OUT:
> BIAS
I
:
Power supply input for ECL buffer circuitry.
Ground return for –5.2V ECL supply and –V.
Power Supply input for Bias and Modulation currents as well as laser diode drive circuitry.
Precision reference output, +5V with respect to –V (if –V is –12V, REF OUT would be –7V).
Input used to set the Bias current for the laser diode. Maximum bias current occurs when the voltage at
the BIAS
I
input is +2V with respect to the –V input. The voltage at the BIAS
I
input for a given bias cur-
rent is determined by the equation:
V(BIAS
I
) = –V + (desired bias current) x 40
Input used to set the Modulation current for the laser diode. This current is added to the Bias
I
current
which always flows through the laser diode. Maximum modulation current occurs when the voltage at the
MOD
I
input is +0.5V with respect to the –V input. The current set by the MOD
I
voltage is controlled by
the ECL RF input. When the RF input is open or set to an ECL “l(fā)ow” input, only BIAS
I
current flows
through the laser diode. The voltage at the MOD
I
input for a given modulation current is determined by
the equation:
V(MOD
I
) = –V + (desired modulation current) x 2.5
SMA connector for single ended ECL input. The input is terminated with an equivalent 50
into –2V re-
quired by the ECL logic family. This input accepts data rates up to 622Mbps.
SMA connector for 50
transmission line connected to laser. The patented “backmatching” technique
does not require a 50
termination at the laser diode end of the transmission line.
> MOD
I
:
> RF IN:
> RF OUT:
Input Specifications
Power Inputs
–5.2V Supply
–12V Supply (–V)
RF IN
BIAS
I
MOD
I
–4.9V to –5.5V @ 115mA max.
–9V to –12V @ 420mA max.
ECL logic levels, 0–622Mbps
0 to 40mA for input voltage –V to –V + 2V
0 to 400mA for input voltage –V to –V + 1.0V
Output Specifications
RF OUT
Current output into 50
transmission line
Low Current = BIAS
I
, High Current = MOD
I
10 feet max.
–V +5V
RF OUT Transmission Line Length
REF OUT
Environmental Conditions
Operating Temperature
Storage Temperature
–55°C to 100°C (case)
–65°C to 150°C
Pin Designations
Description
–5.2V input (–5.2V)
Ground (GND)
–V Input (–V)
Reference Voltage Output (REF OUT)
Bias
I
Adjust (BIAS
I
)
Modulation
I
Adjust (MOD
I
)
ECL Input Waveform (RF IN)
Laser Diode Current Drive (RF OUT)
HY6410
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
SMA 1
SMA 2
Model No.
HY6410
Description:
400mA High Speed Laser Diode Driver;
metal hermetic package
Application:
ECL Digital Modulation of Laser Diode
Ordering Information