Analog Devices AD260BND-4

Digital Isolators IC 35kV 20Mhz 5 line Logic Iso

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. "AD260 and AD261 has been evaluated and has successfully demonstrated to be compatible with standard 500F (260C) wavesolder processes." Wavesoldering: The AD260 and AD261 has been evaluated and demonstrated to be able to withstand the typical 500 degree Fahrenheit (260 degrees Celsius) wave solder processes that are common for board assemblies using traditional Sn63/Pb37 (tin/lead) solder. As the AD260/AD261 is manufactured from an assembled board process, high temperature wavesolder processes that use wave solder pot temperatures in excess of 505F (262.8C) should be avoided. Aqueous Cleaning: The AD260/261 has been evaluated for and have been found to be compatible with typical de-ionized aqueous cleaning processes. Solvent-Based Immersion Cleaning: The AD260/261 has not been evaluated for compatibility with solvent-based and immersion type cleaning processes. The AD260/261 package is not hermetically sealed and consequently, solvent-based and immersion type cleaning processes may have the potential of causing solvent/contamination entrapment. The capability of the AD260/261 with these unique solvent-based cleaning systems would require evaluation individual process basis. 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

The AD260 is designed using Analog Devices new IsoLogic circuit architecture to isolate five digital control signals to/ from a micro controller 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 accurately 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. System 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/us 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 transitions, 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 us after a fault condition or after the power-up reset interval. The AD260 also has an integral center tap transformer for generating 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 desired 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 configurations 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% production 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/us without false triggering or damage to the device. (Continued on page 6) IsoLogic is a trademark of Analog Devices, Inc.