A silicon core for an acoustic archival tag

This paper presents a tiny 0.5 µm CMOS chip, which forms the core of an acoustic archival tag. The 1.5×1.5 mm die enables tracking of small fishes by detecting a specific sound signature emitted by moored sources. It also houses a temperature sensor and a pressure sensor interface and controls all internal and external communication. The tag consumes 6 µW in standby mode and approximately 75 µW while the sound arrival time detector is operational.