Coherent Systems Architect - Mixed Signal AFE development

Job description

We are seeking a hands-on Coherent RF Architect to lead silicon bring-up, validation, and production test development for a mixed-signal Analog Front-End (AFE) featuring high-speed DACs, ADCs, PLL/clocking , and the RF electrical interface to the Transmitter and Receiver Optical Sub‑Assembly (TROSA) used in the optical coherent pluggable. The role owns end-to-end AFE characterization, from bench measurement and automation through correlation to simulation test coverage. NION2026: Key Responsibilities: Silicon Bring-up & Debug: Own first-silicon bring-up for DAC/ADC/PLL blocks: power-up sequencing, register access, clock tree bring-up, and initial functional validation. Debug mixed-signal issues across domains (clocking, analog biasing, digital control, interfaces, and test modes). Create debug playbooks and “known-good” procedures to accelerate lab triage and cross-team communication. Full AFE Characterization (Bench + Automation) DAC: SFDR, IMD, THD, SNR, ENOB, spurs vs. output amplitude, output frequency, sampling frequency, temperature, supply, and code format; static linearity where applicable. ADC: SNR, ENOB, SFDR, interleaving mismatch (offset/gain/timing), harmonic/spurious...