Features
- > 85GHz 3dB bandwidth with greater than 70GHz peaking frequency
- 14dB (typical) peaking to compensate for package and modulator losses
- > 10dB dynamic range of gain control
- 3.2W (typical) power consumption for 4.0Vppd output voltage swing
- AC‑coupled 100Ω differential input
- Open‑collector output stage capable of driving a DC‑coupled 60Ω differential load
- Ultra‑low inter‑channel crosstalk
- Precise analog and digital monitoring and control of gain and output voltage swing
- < 1MHz low‑frequency cutoff
- Optical Internetworking Forum (OIF) compliant SPI for programmability
RRT75474 Block Diagram
Description
The RRT75474‑DNT is a low‑power, high‑performance, 128Gbaud quad‑channel linear driver IC. It is designed for 800Gbps and beyond optical integrated transmitter small‑form‑factor (SFF) modules used in metro and long‑haul applications.
The device integrates analog control circuitry and digital control via an serial peripheral interface (SPI), enabling precise, independent drive‑level control, and monitoring. Each driver channel features a 100 Ω differential AC‑coupled input and a 60 Ω differential interface with an open‑collector output stage. The device is suitable for InP based, thin‑film lithium niobate, and silicon photonics Mach–Zehnder modulators.
Parameters
| Attributes | Value |
|---|---|
| Function | Linear Driver |
| Data Rate Max (Gbps) | 140 |
| Channels (#) | 4 |
| Output Type | Differential |
| Output Voltage (V) | 4 |
Package Options
| Pkg. Type |
|---|
| WAFER |
Product Comparison
| RRT75474 | RRT75472 | |
| Channels (#) | 4 | 4 |
| Data Rate Max (Gbps) | 140 | 140 |
| Output Type | Differential | Single-ended |
| Output Voltage (V) | 4 | 2 |
| Temp. Range (°C) | -5 to 95°C | -5 to 95°C |
Applications
- 800G and beyond advanced multi-level QAM modulation systems
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