Features: · Multirate Operation From 155 Mbps up to 4.25 Gbps
· Bias Current Programmable From 1 mA to 100 mA
· Modulation Current Programmable From 5 mA to 85 mA
· APC and Fault Detection
· Fault Mode Selection The ONET4211LD is a laser driver for multiple fiber
· Bias and Photodiode Current Monitors
· CML Data Inputs
· Temperature Compensation of Modulation Current
· Single 3.3-V Supply
· Surface-Mount, Small-Footprint, 4 mm × 4 mm 24-Lead QFN Package
Application· Fibre Channel Optical Modules
· SONET/SDH Transmission Systems
· Fiber Optic Data Links
· Digital Cross-Connects
· Optical Transmitters
Pinout
Specifications
| VCC |
Supply voltage(2) |
0.3 V to 4 V |
| IIBIAS |
Current into BIAS |
20 mA to 120 mA |
| IIMOD+,IIMOD |
Current into MOD+, MOD |
20 mA to 120 mA |
| IPD |
Current into PD |
5 mA to 5 mA |
VDIN+,VDIN,VDISABLE,VMONB,
VMONP,VFLTMODE,VSDOWN |
Voltage at DIN+,DIN,DISABLE,MONB,MONP, FLTMODE, SDOWN(2 |
0.3 V to 4V |
VCAPC,VIBMAX,VMODSET,
VAPCSET,VMODTC |
Voltage at CAPC, IBMAX, MODSET, APCSET, MODTC(2) |
0.3 V to 3V |
| VMOD+,VMOD |
Voltage at MOD+, MOD(2) |
0.6 V to VCC + 1.5 V |
| VBIAS |
Voltage at BIAS(2) |
1 V to 3.5 V |
| ESD |
ESD rating at all pins except MOD+, MOD |
2 kV (HBM) |
| ESD rating at MOD+, MOD- |
1 kV (HBM) |
| TJ,max |
Maximum junction temperature |
150°C |
| TSTG |
Storage temperature range |
65°C to 150°C |
| TA |
Characterized free-air operating temperature range |
40°C to 85°C |
| TLEAD |
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds |
260°C |
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolutemaximumrated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.
DescriptionThe ONET4211LD is a laser driver for multiple fiber optic applications up to 4.25 Gbps. The device accepts CML input data and provides bias and modulation currents for driving a laser diode. Also provided are automatic power control (APC), temperature compensation of modulation current fault detection, and current monitor features.
The device ONET4211LD is available in a small-footprint, 4 mm * 4mm 24-pin QFN package. The circuit requires a single 3.3-V supply. A This power-efficient laser driver is characterized for operation from 40°C to 85°C.
ONET4211LD Data Sheet
