Zenith® (CAS150/170) from Silicon Sensing Systems Ltd is a closed-loop, single-axis MEMS accelerometer developed for precision-critical marine environments. It combines a preliminary noise spectral density of 10 μg/√Hz with a ±14g acceleration range, supporting precise linear-acceleration measurement in demanding surface and sub-surface conditions. Its compact, surface-mountable design is intended for marine systems where space, weight, and sustained measurement performance are important.
Zenith® is available in in-plane CAS150 and orthogonal CAS170 configurations, allowing engineers to implement multi-axis measurement using devices mounted on a single PCBA. The accelerometer provides digital SPI® output and is intended for use on autonomous and manned marine platforms. The supplied product information also identifies precise heave measurement over time as a potential application.
| Specification: | CAS150 | CAS170 |
| Bias Variation over Temperature: | ±0.15 mg/°C typical | ±0.15 mg/°C typical |
| Bandwidth (Nominal): | 425 Hz typical | 425 Hz typical |
| Operating Temperature: | -40 to +105°C | -40 to +105°C |
| SF Tolerance at 20°C: | -0.75% min, +0.75% max | -0.75% min, +0.75% max |
| Operational Shock: | 1000g/1 ms ½-sine | 1000g/1 ms ½-sine |
| Axes of Acceleration: | 1 | 1 |
| Acceleration Range: | ±14g | ±14g |
| Noise Spectral Density: | 10 μg/√Hz | 10 μg/√Hz |
| Vibration Rectification: | 70 μg/g² typical | 70 μg/g² typical |
| Size: | 10.4 × 6.0 × 2.2 mm | 10.4 × 6.7 × 2.7 mm |
| SF Variation over Temperature: | +1.3% / -0.8% | +1.3% / -0.8% |
