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.