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AD260BND-4 数据表(PDF) 1 Page - Analog Devices |
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AD260BND-4 数据表(HTML) 1 Page - Analog Devices |
1 / 8 page REV. 0 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD260 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 High Speed, Logic Isolator with Power Transformer FUNCTIONAL BLOCK DIAGRAM S0 1 F3 21 SYSTEM FIELD +5Vdc 5Vdc RTN DRIVE +5Vdc 5Vdc RTN 17V p-p OUT CT OUT 17V p-p OUT S1 2 S2 3 S3 S4 DRVA F0 F1 F2 F4 19 20 22 15 16 18 6 7 8 4 5 AD260 +5V DRVCT DRIVE DRVB TRISTATE LATCH E D LINE 2 TRISTATE LATCH E D LINE 1 TRISTATE LATCH E TRISTATE D LINE 0 13 14 9 12 10 11 LATCH D E LINE 4 TRISTATE LATCH D E LINE 3 TRISTATE +5VdcFLD 5V RTNFLD ENABLEFLD PWRAFLD PWRCTFLD PWRBFLD 5V RTNSYS +5VdcSYS ENABLESYS 17 FEATURES IsoLogic™ Circuit Architecture Isolation Test Voltage: To 3.5 kV rms Five Isolated Logic Lines: Available in Six I/O Configurations Logic Signal Bandwidth: 20 MHz (Min), 40 mbps (NRZ) Isolated Power Transformer: 37 V p-p, 1.5 W Max CMV Transient Immunity: 10 kV/ s Min Waveform Edge Transmission Symmetry: 1 ns Field and System Output Enable/Three-State Functions Performance Rated Over –25 C to +85 C UL1950, IEC950, EN60950 Certification, Pending APPLICATIONS PLC/DCS Analog Input and Output Cards Communications Bus Isolation General Data Acquisition Applications IGBT Motor Drive Controls High Speed Digital I/O Ports GENERAL DESCRIPTION The AD260 is designed using Analog Devices new IsoLogic circuit architecture to isolate five digital control signals to/ from a microcontroller and its related field I/O components. Six models allow all I/O combinations from five input lines to five output lines, including combinations in between. Every AD260 effectively replaces up to five opto-isolators while also providing the 1.5 W transformer for a 3.5 kV isolated dc-dc power supply circuit. Each line of the AD260 has a bandwidth of 20 MHz (min) with a propagation delay of only 14 ns, which allows for extremely fast data transmission. Output waveform symmetry is maintained to within ±1 ns of the input so the AD260 can be used to accu- rately isolate time-based PWM signals. All field or system output pins of the AD260 can be set to a high resistance three-state level by use of the two enable pins. A field output three-stated offers a convenient method of presetting logic levels at power-up by use of pull-up/down resistors. Sys- tem side outputs being three-stated allows for easy multiplexing of multiple AD260s. The isolation barrier of the AD260 B Grade is 100% tested at 3.5 kV rms (system to field). The barrier design also provides excellent common-mode transient immunity from 10 kV/ µs common-mode voltage excursions of field side terminals relative to the system side, with no false output triggering on either side. Each output is updated within nanoseconds by input logic tran- sitions, the AD260 also has a continuous output update feature that automatically updates each output based on the dc level of the input. This guarantees the output is always valid 10 µs after a fault condition or after the power-up reset interval. The AD260 also has an integral center tap transformer for gen- erating isolated power. Typically driven by a 5 V push-pull drive at the primary, it will generate a 37 V p-p output capable of supplying up to 1.5 W. This can then be regulated to the de- sired voltage, including ±5 V dc for circuit components and 24 V for a 20 mA loop supply when needed. PRODUCT HIGHLIGHTS Six Isolated Logic Line I/O Configurations Available: The AD260 is available in six pin-compatible versions of I/O con- figurations to meet a wide variety of requirements . Wide Bandwidth with Minimal Edge Error: The AD260 with IsoLogic affords extremely fast isolation of logic signals due to its 20 MHz bandwidth and 14 ns propagation delay. It maintains a waveform input-to-output edge transition error of typically less than ±1 ns (total) for positive vs. negative transition. 3.5 kV rms Test Voltage Isolation Rating: The AD260 B Grade is rated to operate at 1.25 kV rms and is 100% pro- duction tested at 3.5 kV rms, using a standard ADI test method. High Transient Immunity: The AD260 rejects common- mode transients slewing at up to 10 kV/ µs without false trigger- ing or damage to the device. (Continued on page 6) IsoLogic is a trademark of Analog Devices, Inc. |
类似零件编号 - AD260BND-4 |
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类似说明 - AD260BND-4 |
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