The CRD5378 is a compact reference design for the Cirrus Logic single-channel seismic chip set. It features a single-channel seismic acquisition node, CS3302A hydrophone amplifier, CS5373A ∆Σ modulator + test DAC, CS5378 digital filter + PLL, and precision voltage reference.
The CRD5378 is a compact reference design board for a single‑channel seismic acquisition system. It integrates a CS3302A hydrophone amplifier, a CS5373A AX modulator with test DAC, and a CS5378 digital filter with PLL, plus a precision voltage reference and an 8051‑type microcontroller with SPI and USB interfaces. The board measures 5" × 1.25" × 0.5" and includes a detachable acquisition/telemetry connector for remote sensor applications.
The manual covers initial setup (kit contents, power connections, jumper settings), detailed hardware description, software installation (Seismic Evaluation GUI and USBXpress driver), self‑test procedures, a bill of materials, PCB layer plots and schematics. It also provides guidance on using the PC evaluation software for FFT, time‑domain and noise‑histogram analysis.
| Board size | 5" x 1.25" x 0.5" |
|---|---|
| Power supply | +/- 3.3 V @ 100 mA |
| Microcontroller | 8051‑type |
| Interfaces | SPI and USB |
| On‑board test DAC | Provides precision differential analog signals |
| Voltage reference | Precision voltage reference |
The board needs a bipolar power supply that provides +/- 3.3 V at up to 100 mA.
It communicates with a PC via a USB connection and uses an SPI interface to talk to the digital filter.