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AD7401BRW Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD7401BRW Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 10 page Isolated Sigma-Delta Modulator Preliminary Technical Data AD7400/AD7401 FEATURES Up to 20 MHz Data Rate (AD7401) 10 MHz Data Rate (AD7400) 2nd Order Modulator ±4 LSB INL @16 Bits Onboard Digital Isolator Onboard Reference Low Power Operation: 15 mA @ 5 V -40 C to +105 C Operating Range 16-ld SOIC Package Safety and Regulatory Approvals UL Recognition 3750 VRMS for 1 minute per UL 1577 CSA Component Acceptance Notice ~5A VDE Certificate of Conformity DIN EN 60747-5-2 (VDE 0884 Part 2):2003-01 DIN EN 60950 (VDE 0805): 2001-12; EN 60950:2000 VIORM = 840VPEAK APPLICATIONS AC Motor Control Data Acquisition Systems A/D + Opto-Isolator Replacement GENERAL DESCRIPTION The AD7400/AD7401 are 2nd order sigma-delta modulators that convert an analog input signal into a high speed 1-bit data stream with onboard digital isolation based on Analog Devices’ iCoupler® technology. The AD7400/AD7401 operate from a 5 V power supply and accept a differential input signal of ±200 mV. The analog input is continuously sampled by the analog modulator, eliminating the need for external sample and hold circuitry. The input information is contained in the output stream as a density of ones with data rates up to 20MHz. The original information can be reconstructed with an appropriate digital filter. The serial I/O may use a 5V or 3V supply (VDD2). The serial interface is digitally isolated. High-speed CMOS, FUNCTIONAL BLOCK DIAGRAM UPDATE ENCODE DECODE WATCHDOG T/H VDD1 Σ-∆ ADC MCLKOUT* CONTROL LOGIC MDAT GND1 VDD2 GND2 VIN+ VIN- REF BUF UPDATE ENCODE DECODE WATCHDOG *MCLKIN pin on AD7401 Rev. PrH Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. |
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