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CS5371A-ISZ Fiches technique(PDF) 1 Page - Cirrus Logic |
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CS5371A-ISZ Fiches technique(HTML) 1 Page - Cirrus Logic |
1 / 32 page Copyright © Cirrus Logic, Inc. 2006 (All Rights Reserved) http://www.cirrus.com CS5371A CS5372A Low-power, High-performance ∆Σ Modulators Features Fourth-order ∆Σ Architecture Clock-jitter-tolerant Architecture Input Voltage: 5 Vpp Fully Differential Input Signal Bandwidth: DC to 2 kHz High Dynamic Range • 127 dB SNR @ 215 Hz BW (2 ms sampling) • 124 dB SNR @ 430 Hz BW (1 ms sampling) Low Total Harmonic Distortion • -118 dB THD typical (0.000126%) • -112 dB THD maximum (0.000251%) Low Power Consumption • Normal operation: 25 mW per channel • Power down: 10 µW per channel Small Footprint, 24-pin SSOP package Multi-channel System Support • 1-channel System: CS5371A • 2-channel System: CS5372A • 3-channel System: CS5371A + CS5372A • 4-channel System: CS5372A + CS5372A Bipolar Power Supply Configuration • VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V Description The CS5371A and CS5372A are one- and two-channel, high-dynamic-range, fourth-order ∆Σ modulators intend- ed for geophysical and sonar applications. When combined with CS3301A / CS3302A differential amplifi- ers, the CS4373A test DAC and CS5376A digital filter, a small, low-power, self-testing, high-accuracy, multi- channel measurement system results. The modulators have high dynamic range and low total harmonic distortion with very low power consumption. They convert differential analog input signals from the CS3301A / CS3302A amplifiers to an oversampled seri- al bit stream at 512 kbits per second. This oversampled bit stream is then decimated by the CS5376A digital filter to a 24-bit output at the selected output word rate. In normal operation, power consumption is 5 mA per channel. Each modulator can be independently powered down to 500 µA per channel, and by halting the input clock they will enter a micro-power state using only 2 µA per channel. The CS5371A and CS5372A modulators are available in small 24-pin SSOP packages, providing exceptional per- formance in a very small footprint. ORDERING INFORMATION See page 31. Clock Generator INF1+ VREF+ VREF- VA+ VA- VD GND PWDN1 MFLAG1 MDATA1 MCLK MSYNC MFLAG2 MDATA2 PWDN2 INF1- INR1- INR1+ INF2+ INF2- INR2- INR2+ 4th Order ∆Σ Modulator 4th Order ∆Σ Modulator OFST CS5372A Clock Generator INF+ VREF+ VREF- VA+ VA- VD GND PWDN MFLAG MDATA MCLK MSYNC INF- INR- INR+ 4th Order ∆Σ Modulator OFST CS5371A DEC ‘06 DS748F1 |
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