Ideal for Single-Sensor Seismic Acquisition Nodes

HOUSTON, SEG (Society of Exploration Geophysicists) International Exposition and 75^th Annual Meeting – Nov. 6 , 2005 – With the introduction of the CS5373A seismic integrated circuit (IC), Cirrus Logic (Nasdaq: CRUS) now offers seismic system designers a unique solution for high-precision single-sensor seismic acquisition, geophysical instruments and geophysical applications. In one highly integrated IC, Cirrus Logic has combined the outstanding performance of a seismic 24-bit, fourth-order Delta Sigma modulator and the functionality of a seismic test DAC, allowing for the implementation of ultra-compact single-channel seismic acquisition nodes.

“The physical size of the equipment in these large distributed systems directly affects deployment costs,” said John Paulos, vice president of Cirrus Logic’s Industrial Products Division, “The CS5373A provides designers with the ability to create smaller high-performance low-power geophysical instruments. Smaller, lighter acquisition nodes reduce overhead costs, providing greater operational return on investment in the process.”

Available in a leaded or lead-free 28-pin TSSOP package, the CS5373A Delta Sigma modulator with on-chip Seismic Test DAC is well suited for high-resolution self-testing measurement solutions. The on-chip modulator offers low-noise characteristics, outstanding dynamic range (127 dB at a 2 ms sample rate) and -118 dB total harmonic distortion (THD). Selectable attenuation, programmable test modes and dual outputs of the on-chip test DAC make it ideal for testing both the sensor and electronics of single- channel seismic acquisition systems and geophysical instruments. Test DAC distortion performance (THD) of the precision output, used for testing the electronics channel performance, is typically -115 dB and the buffered output, used for testing sensor performance, is typically -105 dB.

The CS5373A device is a key new component of Cirrus Logic’s fourth-generation seismic product development. The CS5373A, when combined with the CS3301/02 differential amplifiers and CS5378 digital filter, completes Cirrus Logic’s Single-S chipset™ — the industry’s smallest-footprint, lowest-power and highest-performance solution available for single-sensor land or marine seismic applications.

Cirrus Logic Inc.

Cirrus Logic develops high-precision analog and mixed-signal integrated circuits for a broad range of consumer and industrial markets. Building on its diverse analog mixed-signal patent portfolio, Cirrus Logic delivers highly optimized products for consumer and commercial audio, automotive entertainment and industrial applications. The company operates from headquarters in Austin, Texas, with offices in Colorado, Europe, Japan and Asia.

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Cirrus Logic and Cirrus are trademarks of Cirrus Logic Inc. All other product names noted herein may be trademarks of their respective holders.

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