TI ONET1151LRGET

The ONET1151L is a 3.3V laser driver designed for direct modulation of a laser at data rates between 1 and 11.3Gbps. The device provides a two-wire serial interface enabling digital control of modulation and bias currents, eliminating the need for external components. Output waveform control in the form of crossing point adjustment, de-emphasis, and output termination resistance is provided to improve optical eye diagram mask margin. An optional input equalizer can be used for equalization of microstrip or stripline transmission lines up to 150mm (6 inches) on FR-4 PCBs. The device incorporates internal ADC and DAC to eliminate the need for special-purpose microcontrollers. The ONET1151L includes an integrated automatic power control (APC) loop that compensates for variations in voltage, temperature, and laser average optical power on the circuit to support laser safety and transceiver management systems. The laser driver is rated for operation over an ambient temperature range of -40°C to +100°C and is offered in a compact 4mm×4mm, 24-pin, RoHS-compliant QFN package that is pin-compatible with the ONET1101L.

• Digitally selectable modulation current up to 85mApp (10Ω load)
• Digitally selectable bias current up to 100mA source or sink
• Two-wire digital interface with integrated DAC and ADC for control and diagnostic management
• Automatic Power Control (APC) loop
• Adjustable output resistance and de-emphasis
• Programmable input equalizer
• Crosspoint control
• Selectable monitor PD current range and polarity
• Laser safety features included
• +3.3V single supply
• Temperature range -40°C to 100°C
• Surface-mount 4mm×4mm, 24-pin, RoHS-compliant QFN package
• Pin-compatible with ONET1101L device

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