ONET1151LRGET

Overview

The ONET1151LRGET is a single-channel laser diode driver from Texas Instruments, designed for direct modulation of lasers 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. It utilizes a 2-wire serial interface with integrated DACs and ADCs for management without external microcontrollers. Packaged in a 24-pin VQFN (4x4 mm), it supports industrial temperatures from -40°C to +100°C.

Feature Summary

• Integrates an automatic power control loop to compensate for laser average power variations caused by voltage and temperature changes.
• Features a programmable input equalizer capable of compensating for signal loss on FR4 printed circuit board traces up to 150 mm long.
• Provides digital control over modulation and bias currents via a 2-wire serial interface, eliminating the need for external components.
• Includes output waveform controls such as cross-point adjustment and de-emphasis to improve optical eye diagram template margins.

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 component authenticity through authorized distributors or official Texas Instruments channels. Confirm RoHS compliance status and check for specific package variants. Review the latest datasheet for any pinout or electrical specification updates. Ensure handling procedures meet moisture sensitivity level requirements during storage and assembly.

Selection Notes

Select this driver for applications requiring high-speed direct modulation of laser diodes up to 11.3 Gbps. It is suitable for designs needing integrated automatic power control and digital management capabilities. Consider the 24-pin VQFN package for space-constrained layouts. Ensure the system design accommodates the single 3.3V supply requirement and thermal dissipation needs within the specified operating temperature range.

Part Context

The ONET1151LRGET belongs to the ONET1151L family of low-power laser diode drivers. It is pin-compatible with the ONET1101L device, facilitating potential upgrades or design reuse. This series targets high-speed optical communication systems, offering integrated diagnostics and control features to simplify transmitter design and reduce component count.

Replacement Considerations

The ONET1101L is documented as pin-compatible with the ONET1151L family. Verify functional equivalence and environmental specifications before substitution. No other specific substitute part numbers are confirmed in the provided documentation.