ONET1151LRGER

Overview

The ONET1151LRGER is a single-channel laser diode driver from Texas Instruments, designed for direct modulation at data rates up to 11.3 Gbps. It operates on a single +3.3V supply and features digital control for modulation current (up to 85 mA) and bias current (up to 100 mA). The device integrates an automatic power control loop, input equalizer, and cross-point adjustment to optimize optical eye diagrams. Packaged in a 24-pin VQFN (4x4 mm) enclosure, it supports an operating temperature range of -40°C to +100°C.

Feature Summary

• Integrates a two-wire serial interface with DAC and ADC for digital control of modulation and bias currents without external microcontrollers.
• Includes an integrated automatic power control loop to compensate for laser average power variations caused by voltage and temperature changes.
• Features programmable input equalization to compensate for signal loss on FR4 printed circuit board transmission lines up to 150 mm.

Applications

• 10 Gigabit Ethernet optical transmitters
• 8x and 10x Fibre Channel optical transmitters
• SONET OC-192 and SDH STM-64 optical transmitters
• SFP+ and XFP optical transceiver modules

Procurement Notes

Verify the specific suffix LRGER against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Check for any recent product change notices regarding material or assembly location updates that may affect qualification.

Selection Notes

Select this component when a single-channel driver with integrated APC and digital control is required for high-speed optical links. Ensure the system design accommodates the 24-VQFN thermal pad requirements and the 3.3V supply constraint. Verify that the 11.3 Gbps maximum data rate aligns with the target protocol speed and that the pinout is compatible with existing PCB layouts if replacing legacy parts like the ONET1101L.

Part Context

This part belongs to the ONET1151L family of low-power laser diode drivers. It is functionally similar to the ONET1101L but offers enhanced digital control features and integrated diagnostic capabilities via its serial interface. The device is distinct from the ONET1151P limiting amplifier series, serving specifically as a modulator driver for laser diodes rather than a signal amplifier.

Replacement Considerations

The ONET1101L is documented as pin-compatible with the ONET1151L series. Verify electrical parameter compatibility before substitution.