Features
- Typical baud rate of 140Gbaud per channel for 800G, 1.2T, and beyond DP‑mQAM applications
- > 75GHz electro‑optic bandwidth
- > 10dB dynamic range for gain control
- 4.0W typical power at linear 2.0Vpp single‑ended output
- AC‑coupled 100 Ω differential input
- 30Ω to 50Ω single‑ended output
- Achieves ultra‑low inter‑channel crosstalk for high‑density designs
- Peaking adjustment functionality
- Analog control of gain and output voltage for peak detection and gain control monitor
- OIF‑compliant SPI digital interface integration
Description
The RRT75472 is a low-power, high-performance, quad-channel linear driver chip that is designed for 800G, 1.2T and beyond optical integrated transmitter small-form factor (SFF) modules for metro and long-haul applications.
The device integrates quad-lanes of driver with serial peripheral interface (SPI) circuitry for DC controls and monitoring purposes on a single die. Each channel of driver has 100Ω differential AC-coupled input and a single-ended output with a back-terminated output stage. The output stage allows external AC-coupled interface with optical modulators having a wide characteristic impedance range from 30Ω to 50Ω. The linear output voltage of 2.0Vpps is suitable for the LiNbO3 optical modulators with multi-level QAM modulation.
Parameters
| Attributes | Value |
|---|---|
| Function | Linear Driver |
| Data Rate Max (Gbps) | 140 |
| Channels (#) | 4 |
| Output Type | Single-ended |
| Output Voltage (V) | 2 |
Package Options
| Pkg. Type |
|---|
| WAFER |
Product Comparison
| RRT75472 | RRT75474 | |
| Channels (#) | 4 | 4 |
| Data Rate Max (Gbps) | 140 | 140 |
| Output Type | Single-ended | Differential |
| Output Voltage (V) | 2 | 4 |
| Temp. Range (°C) | -5 to 95°C | -5 to 95°C |
Applications
- 800G, 1.2T and beyond advanced multi-level QAM modulation