Pscheidl, FerdinandFerdinandPscheidlHerzer, ElmarElmarHerzerStoll, AndreasAndreasStollRichter, LeonidasLeonidasRichterSchuhmann, ClaudiaClaudiaSchuhmannKöhler, StefanStefanKöhlerRuping, SebastianSebastianRupingKampa, Matthias GeorgMatthias GeorgKampaBrederlow, RalfRalfBrederlowLeugering, JohannesJohannesLeugering2025-11-112025-11-112025-09-08https://publica.fraunhofer.de/handle/publica/49903510.1109/ESSERC66193.2025.11214098SENNA is a first-of-its-kind mixed-signal circuitswitched field-programmable accelerator for Spiking Neural Networks (SNNs). We demonstrate a 1024-neuron and 25.6k synapse proof-of-concept chip in 22 nm FDSOI that achieves 687 fJ energy per synaptic operation (E/SOP) at 25 MHz and 23 mW. The IC allows a very flexible configuration of parallel processed SNNs. Due to its low power draw, low spike-in-spikeout (SISO) latency of 40 ns and time-deterministic response, this design is particularly promising for real-time edge applications.enconference paper