Product Overview
NeoPhotonics’ GaAs 53 Gbaud PAM4 driver IC is a linear, differential driver optimized for 1 x 100 Gbps and 4 x 100 Gbps applications requiring PAM4 modulation. This driver, implemented in a high-performance GaAs PHEMT process, provides RF output voltage that is well suited to modulate silicon and InP Mach-Zender Modulators (MZM) while maintaining exceptional TDECQ. Its adjustable gain range of 6 dB allows easy interface to a wide range of PAM4 DSPs while maintaining deep modulation to the MZMs.
This driver comes in single- and quad-channel configurations featuring 625- or 700-um channel pitch. The wider channel pitch of 700-um exhibits 4 dB better inter-channel cross-talk penalty in comparison to the 625-um version.
Features
- TSV (through-substrate vias) for solid signal ground implementation
- Adjustable gain control for easy interface to a variety of PAM4 DSPs
- 625- and 700-um channel pitches for selectable inter-channel cross-talk penalty
- Available in single- and quad-channel versions
Benefits
- Large, highly linear RF differential output swing suited to drive Si MZMs
- Compact die size suited for CoB (chip-on-board) assembly aimed at Qsfp-DD and Osfp transceivers
- Qualified for non-hermetic environment
Details
| Parameters | Specifications |
|---|---|
| Data rate | 53 GBd |
| Bandwidth, typical | 35 GHz |
| Output voltage swing, typical | 3.5 Vpp |
| Gain, maximum | 18.5 dB |
| Gain adjustment range | 6 dB |
| THD at 1 GHz | Under 3% |
| Channel pitch | 625 um and 700 um |
| Power consumption, typical | 0.6W/channel |
| Die size | 1.47 x 3.2 mm |
| Process technology | GaAs PHEMT |