Features: · Differential 50 W inputs for direct connection to Current-Mode Logic (CML) outputs
· Internal retiming to minimize jitter (OQ2545HP only)
· Input clock phase margin of 320° at 2.5 Gbits/s (OQ2545HP only)
· RF output current sinking capability of 60 mA
· Bias output current sinking capability of 100 mA
· TTL compatible control inputs
· Loop mode for system testing
· Continuous output monitoring
· Power dissipation <1500 mW (for typical application)
· Low cost LQFP48 plastic package.Application· Digital fibre optical modulation driver in STM16/OC48 short, medium and long haul optical transmission systems
· Optical modulation driver in high-speed data networks
· High current driver for electro-optical converters
· High current electrical line driver.Pinout
Specifications
| SYMBOL |
PARAMETER |
MIN. |
MAX. |
UNIT |
| VCC |
supply voltage for TTL interface |
-6 |
+6.0 |
V |
| VEE1 |
supply voltage for TTL interface |
-0.5 |
+0.5
|
V |
| VEE2 |
supply voltage for analog section
|
-7.5 |
+0.5 |
V |
| Vn |
DC voltage on
pins DIN, DINQ, DLOOP, DLOOPQ, CIN, CINQ, CLOOP
and CLOOP
pins MON and MONQ
pins ALS and ENL
pins EFADJ, APADJ, SIMOD and SIBIAS
pins SMOD and BGCAP |
-1.0
-2.0
-0.5
VEE2 - 0.5
VEE1 - 0.5 |
+0.5
+0.5
VCC + 0.5
0.5
0.5 |
V
V
V
V
V |
| In |
DC current on
pins LA and LAQ
pin IBIAS
pins MON and MONQ
pin DIOA |
-
-
-
- |
80
110
20
10
|
mA
mA
mA
mA |
| Tj |
junction temperature |
- |
150 |
|
| Tstg |
storage temperature |
-65 |
+150 |
|
DescriptionThe OQ2545HP is a driver IC intended to be used with a directly modulated laser diode or with an Electro Absorption Modulator (EAM) in SDH/SONET 2.5 Gbits/s optical transmission systems.
The IC OQ2545HP features differential data inputs. Loop mode inputs are provided for system testing, along with an output for continuous monitoring. In addition, the OQ2545HP features differential clock inputs for internal retiming resulting in a better jitter performance.
The IC OQ2545HP has bias and modulating current outputs, the levels of which can be set separately. As an additional safety measure, the active HIGH-level input for automatic laser shutdown (pin ALS) can be used to switch off the laser modulation and bias currents.
Although the IC OQ2545HP is intended for 2.5 Gbits/s optical transmission systems, it can be used in any application requiring high current drive at high frequencies.
The IC OQ2545HP is transparent from input to output.
OQ2545HP Data Sheet
