AD261

a FEATURES Isolation Test Voltage: To 3.5 kV rms Five Isolated Logic Lines: Available in Six I/O Configurations Logic Signal Bandwidth: 20 MHz (min) 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 (VDE, CE, 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 F0 High Speed, Logic Isolator AD261 FUNCTIONAL BLOCK DIAGRAM THR STA EETE LINE 0 LATCH D E LATCH D E LATCH D E S0 F1 THR STA EETE LINE 1 2 S1 F2 THR STA EETE LINE 2 3 S2 F3 LATCH D E LATCH D E LINE 3 EETHRATE ST 4 S3 F4 LINE 4 EETHRATE ST 5 S4 ENABLEFLD 17 6 ENABLESYS GENERAL DESCRIPTION +5V dcFLD 16 5V RTNFLD 15 +5V dc 5Vdc RTN +5V dc 7 +5V dcSYS 5V RTNSYS The AD261 is designed 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 AD261 effectively replaces up to five opto-isolators. Each line of the AD261 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 AD261 can be used to accurately...