CS5373A/78 7 .4 mm 9. 9 mm C S 5373 A 28-p in SSOP dime nsions CS5373A Features •Dual power-supply configuration •VA+ = 2.5 V; VA - = - 2.5 V; VD = 3.3 V •Small footprint: 28-pin SSOP package CS5373A Modulator •24-bit analog-to-digital conversion •Fourth-order Delta-Sigma architecture •Clock-jitter-tolerant architecture •Input voltage range 5 Vp-p differential •High dynamic range (signal-to-noise ratio) •127 dB at 215 Hz bandwidth (2 ms sampling) •124 dB at 430 Hz bandwidth (1 ms sampling) •Low Total Harmonic Distortion (THD) •-118 dB THD typical •-112 dB THD max •Low-power consumption •Normal mode: 5 mA •Sleep mode: 220 µA CS5373A Test DAC •Digital Delta-Sigma input, differential analog output •Selectable differential outputs (OUT±, BUF±) •Selectable output attenuation • 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64 • User programmable test modes • AC differential/common mode output • DC pulse/calibration output • AC output voltage: 5 Vp-p differential • DC output voltage: 2.5 Vdc differential • Outstanding noise performance • 114 dB SNR @ 430 Hz bandwidth • Low total harmonic distortion (THD) • OUT±: -115 dB THD typical, -112 dB THD max • BUF±: -105 dB THD typical, -95 dB THD max • Low-power consumption • Normal mode: 8 mA • Sleep mode: 500 µA • Power down: 120 µA High-Performance Chipset for Seismic & Geophysical Measurements The CS5373A & CS5378 Chipset CS5373A Test DAC The CS5373A is a single-channel, high-performance, low-power, fourth-order Delta-Sigma modulator plus an integrated test DAC for sensor and electronics channel testing. The CS5378 is a multifunction digital filter utilizing a low-power signal processing architecture to achieve efficient filtering for Delta-Sigma modulators. When combined, the CS5373A and the CS5378 produce a compact high-resolution, selftesting, analog-to-digital measurement system that is ideal for single-sensor seismic and geophysical applications. The CS5373A integrated Test DAC is a multifunction differential output digital-to-analog converter intended to test high-resolution, low-frequency measurement systems. CS5373A 24-Bit Delta-Sigma Modulator The CS5373A modulator provides high dynamic range and low total harmonic distortion, while consuming significantly less power per channel than our previous generation seismic modulators. This modulator consumes 5 mA in normal operation, 220 µA when placed in sleep mode and by halting the input clock of the modulator, it enters a power down state using only 2 µA. The dual outputs provide a precision output (OUT±) for testing the electronics channel and a buffered output (BUF±) for in-circuit sensor testing. DAC distortion performance (THD) is typically -115 dB from the precision output and -105 dB from the buffered output. Noise performance is 114 dB SNR over a 430 Hz bandwidth. Driven with a digital Delta-Sigma bit stream from the CS5378 digital filter, the maximum AC analog output voltage is a differential 5 V peak-to-peak signal. Low-power consumption, selectable attenuation, dual outputs and programmable test modes make this device ideal for testing single sensor seismic acquisition systems and geophysical instruments. www.cirrus.com CS5373A/78 7 .4 mm 9. 9 mm C S 5378 28-p in SSOP dime nsions CS5378 Features • Single-channel digital decimation filter • Multiple on-chip FIR and IIR coefficient sets • Programmable coefficients for custom filters • Synchronous operation • Selectable output word rate • 4000, 2000, 1000, 500, 333, 250 SPS • 200, 125, 100, 50, 40, 25, 20, 10, 5, 1 SPS • Integrated PLL for clock generation • 1.024 MHz, 2.048 MHz, or 4.096 MHz input • Standard clock or Manchester-encoded input • Digital Calibrations • Gain correction • Offset correction • Offset calibration • Digital test bit-stream signal generator • Sine wave or impulse output mode • Ideal for use with the CS5373A Seismic Test DAC Highly Integrated, Multifunction Decimation Filter with PLL Delivers Accurate Results The CS5378 is a multifunction digital filter utilizing a low-power signal processing architecture to achieve efficient filtering for Delta-Sigma modulators. Digital filter coefficients for the FIR and IIR filters are included on chip or can be programmed for custom applications. Using the on-chip selectable coefficient sets, the digital filter decimation ratios produce output word rates ranging from 4,000 SPS to 1 SPS, resulting in measurement bandwidths ranging from 1,720 Hz down to 430 mHz. The CS5378 provides highly integrated peripherals that simplify system design: • Selectable digital filter decimation ratios • Offset and gain corrections • CS5373A digital test DAC bit-stream Single-S. A Superior Seismic Solution. The CS5373A Delta-Sigma modulator with integrated test DAC and the CS5378 digital filter are the foundation of our Single-S seismic platform. When combined with the CS3301A/02A differential amplifiers, this chipset can easily and quickly create a flexible high-resolution single-sensor measurement system for seismic and geophysical data acquisition. The bottom line? With this chipset, your system ROI is enhanced. Cirrus Logic’s fourth-generation seismic development provides a chipset with exceptional performance and low-power consumption in a very small footprint, enabling end-measurement instruments to perform efficiently and accurately in a smaller, lighter package size compared to previous generation products. signal generator • Time-break controller • 8 general-purpose I/O pins • On-chip PLL and SPI port • Time break controller • 8 general-purpose I/O • Microcontroller or EEPROM configuration • Low-power consumption • 20 mW at 500 SPS OWR • Flexible power supplies • I/O interface and PLL: 3.3 V or 5.0 V • Digital logic core: 2.5 V, 3.3 V, or 5.0 V • Small footprint: 28-pin SSOP www.cirrus.com Cirrus Lo gic , In c. · 2901 Via For t una · Aus t in T X 7 8 74 6 U S A · T 5 1 2 - 8 5 1 - 4 0 0 0 · T 8 0 0 - 8 8 8 - 5 0 1 6 · F 5 1 2 - 8 5 1 - 4 9 7 7 Product Bulletin 0170-0807-PB-W © 2007 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic is a trademark of Cirrus Logic, Inc. Other brand and product names may be trademarks or service marks of their respective owners.