Space-grade LVDS driver for 600 Mbps satellite data links

Supporting higher data rates in orbit is becoming increasingly important as satellites handle more imaging, telemetry and inter-satellite communications. STMicroelectronics has introduced a space-qualified LVDS driver aimed at addressing these bandwidth and power constraints in radiation-heavy environments.

For eeNews Europe readers working on aerospace and defence platforms, the device reflects the continued push towards higher-speed data exchange with lower supply voltages in space-grade components. It also signals ongoing investment in QML-V qualified interface ICs for European space programmes.

At the centre of the announcement is the RHFLVDS41, a Low-Voltage Differential Signaling driver designed for data transmission up to 600 Mbps. According to ST, the device sets a performance benchmark among QML-V qualified LVDS driver devices in this speed class.

The component operates from a wide supply range of 2.3 V to 3.6 V, enabling compatibility with lower-voltage logic families increasingly used in modern satellite subsystems. LVDS technology is typically chosen in these applications for its noise immunity, low electromagnetic emissions and ability to support high data rates over differential pairs, characteristics that are particularly relevant in compact spacecraft architectures.

The RHFLVDS41 is intended for use in onboard data handling, payload instrumentation and other high-speed digital interfaces where radiation tolerance and long mission lifetimes are critical.

Balancing speed, power and radiation tolerance

Space systems designers face a trade-off between throughput, power consumption and robustness. Higher data rates can increase system complexity and energy demand, while radiation-hardening requirements add further constraints on process technology and packaging.

By combining a 600 Mbps data rate with operation down to 2.3 V, the LVDS driver is positioned to support more power-efficient architectures. Lower supply voltages can potentially reduce overall system power budgets, an important consideration in satellites where energy is limited and thermal management is challenging.

The device is qualified to QML-V standards, a key requirement for many institutional and defence space programmes. For European engineers working with ESA or national space agencies, such qualification can simplify component selection and compliance processes.

As satellite constellations expand and onboard processing grows more capable, high-speed differential interfaces are likely to remain a core building block. ST’s latest LVDS driver underlines how interface ICs continue to evolve to meet those demands in space-qualified form.