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部品型式

AD7401AYRWZ

製品説明
仕様・特性

Isolated Sigma-Delta Modulator AD7401A FEATURES GENERAL DESCRIPTION 20 MHz maximum external clock rate Second-order modulator 16 bits, no missing codes ±2 LSB INL typical at 16 bits 1 μV/°C typical offset drift On-board digital isolator On-board reference ±250 mV analog input range Low power operation: 17 mA typical at 5.5 V −40°C to +125°C operating range 16-lead SOIC package Internal clock version: AD7400A Safety and regulatory approvals UL recognition 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A VDE Certificate of Conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 891 V peak The AD7401A1 is a second-order, sigma-delta (Σ-Δ) modulator that converts an analog input signal into a high speed, 1-bit data stream with on-chip digital isolation based on Analog Devices, Inc., iCoupler® technology. The AD7401A operates from a 5 V power supply and accepts a differential input signal of ±250 mV (±320 mV full scale). 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 a data rate up to 20 MHz. The original information can be reconstructed with an appropriate digital filter. The serial I/O can use a 5 V or a 3 V supply (VDD2). The serial interface is digitally isolated. High speed CMOS, combined with Analog Devices, Inc., iCoupler® technology , means the on-chip isolation provides outstanding performance characteristics, superior to alternatives such as optocoupler devices. The part contains an on-chip reference. The AD7401A is offered in a 16-lead SOIC and has an operating temperature range of −40°C to +125°C. APPLICATIONS AC motor controls Shunt current monitoring Data acquisition systems Analog-to-digital and opto-isolator replacements FUNCTIONAL BLOCK DIAGRAM VDD1 VDD2 AD7401A VIN+ T/H Σ-∆ ADC UPDATE ENCODE BUF REF WATCHDOG CONTROL LOGIC WATCHDOG DECODE GND1 DECODE MDAT UPDATE MCLKIN ENCODE GND2 07332-001 VIN– Figure 1. 1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending. Rev. C 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 owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2008–2011 Analog Devices, Inc. All rights reserved.

ブランド

AD

会社名

Analog Devices

本社国名

U.S.A

事業概要

半導体デバイスを製造するアメリカの多国籍企業。特にADC、DAC、MEMS、DSPなどに強い。現在は 65nm から 3μm のプロセスルールの回路を設計している。

供給状況

 
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