Cirrus Logic CRD5378 - Manual

Copyright © Cirrus Logic, Inc. 2008
(All Rights Reserved)
www.cirrus.com
Reference Design Panel (Actual Size)
Data Aquisition Board (Actual Size) Control Board (Actual Size)
CRD5378
Single-Channel Seismic Reference Design
Features
z Single-channel Seismic Acquisition Node
– CS3302A hydrophone amplifier
– CS5373A
∆Σ modulator + test DAC
– CS5378 digital filter + PLL
– Precision voltage reference
z On-board Microcontroller
– SPI ™ interface to digital filter
– USB communication with PC
z Board Design
– Compact board size: 5” x 1.25” x 0.5”
– Detachable acquisition and telemetry nodes
z PC Evaluation Software
– Register setup & control
– FFT frequency analysis
– Time domain analysis
– Noise histogram analysis
General Description
The CRD5378 board is a compact reference design for
the Cirrus Logic single-channel seismic chip set. Data
sheets for the CS3302A, CS5373A, and CS5378 devic-
es should be consulted when using the CRD5378
reference design.
Pin headers connect an external differential sensor to
the analog inputs of the measurement channel. An on-
board test DAC creates precision differential analog sig-
nals for in-circuit performance testing without an external
signal source.
The reference design includes an 8051-type microcon-
troller with hardware SPI™ and USB serial interfaces.
The microcontroller communicates with the digital filter
via SPI and with the PC evaluation software via USB.
The PC evaluation software controls register and coeffi-
cient initialization and performs time domain, histogram,
and FFT frequency analysis on captured data.
The CRD5378 board features a special breakout con-
nector used to detach the acquisition and telemetry
sections for remote sensor applications.
ORDERING INFORMATION
CRD5378 Reference Design
JAN ‘08
DS639RD2