ADM2587EBRWZ-REEL7 Isolators

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1. Describe

ADM2587EBRWZ-REEL7 is a fully integrated signal and Power-isolated data transceiver with ±15 kV ESD protection Suitable for multi-point high-speed communication Transmission line. ADM2582E/ADM2587E includes one Integrated isolated DC-DC power supply eliminates An external DC-DC isolation block is required. They are specially designed for balanced transmission lines, conforming to Comply with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E). These devices integrate ADI's iCoupler® technology Combine a three-channel isolator, a three-state differential line driver, The differential input receiver and Analog Devices isoPower® dc-todc converter are integrated into a single package. These devices consist of a Single 5 V or 3.3 V power supply for fully integrated signal and Power isolation RS-485 solution. The ADM2582E/ADM2587E drivers have active high enable. An active-low receiver enable is also provided, which causes The receiver output enters a high impedance state when disabled. The device has current limiting and thermal shutdown functions Function to prevent output short circuit and situation Bus contention can cause excessive power consumption. Parts are fully specified within the industrial temperature range Range and provide a highly integrated 20-lead wide body SOIC package. ADM2582E/ADM2587E includes isoPower technology Use high-frequency switching elements to pass transformer. Special care must be taken when printing circuit boards Board (PCB) layout to meet emission standards. refer to AN-0971 Application Note, Radiation Emission Control isoPower Devices, detailed information about board layout considerations.

2. Feature

    1. Isolated RS-485/RS-422 transceiver, configurable as half or full duplex

    2. isoPower integrated isolated DC-DC converter

    3. ±15 kV ESD protection on RS-485 input/output pins

    4. Comply with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E)

        - ADM2582E data rate: 16 Mbps

        - ADM2587E data rate: 500 kbps

    5. 5 V or 3.3 V operation

    6. Connect up to 256 nodes on a bus

    7. Open circuit and short circuit fail-safe receiver input

    8. High common mode transient immunity: >25 kV/µs

    9. Thermal shutdown protection

  10. VIORM = 560 V peak

  11. Operating temperature range: −40°C to +85°C

  12. Highly integrated 20-pin wide body SOIC package

3. APPLICATIONS

    1. Isolated RS-485/RS-422 interfaces

    2. Industrial field networks

    3. Multipoint data transmission systems

4. PIN CONFIGURATION

5. Application information

d Several operating frequencies. Noise suppression requires low inductance and high frequency Capacitor, while ripple suppression and proper regulation A large capacity capacitor is required. These capacitors are connected Pin 1 (GND1) and Pin 2 (VCC) and Pin 8 (VCC) and Pin 9 (GND1) of VCC. The VISOIN and VISOOUT capacitors are Connected to pin 11 (GND2) and pin 12 (VISOOUT) and Pin 19 (VISOIN) and Pin 20 (GND2). In order to suppress noise and reduce Ripple, at least a parallel combination of two capacitors is required The smaller of the two capacitors is located closest to the device. The recommended capacitance values are 0.1 µF and 10 µF for VISOOUT at pins 11 and 12, and VCC at pins 8 and 9. Capacitor VISOIN recommends values of 0.01 µF and 0.1 µF VCC at Pin 19 and Pin 20 and Pin 1 and Pin 2. recommend The best practice is to use ceramic capacitors with very low inductance, Or its equivalent, for smaller values. Total lead length Between both ends of the capacitor and the input power supply The pin should not exceed 10 mm. The DC-DC converter part of ADM2582E/ADM2587E Components must run at very high speeds when necessary Frequency to allow efficient power transmission through small transformer. This generates high-frequency current, which can Propagates in the ground and power planes of the circuit board, causing edges And dipole radiation. ADM2582E/ADM2587E has an internal split paddle, Lead frame on the bus side. For best noise suppression, filter GND2 pins (pin 11 and pin 14) and VISOOUT signal Integrated DC-DC converter for high frequency current. Use surface mount ferrite beads in series with the previous signal Route back to the device. The impedance of the ferrite bead is selected as Approximately 2 kΩ between 100 MHz and 1 GHz frequency range Reduced 180 MHz main switch emissions Frequency and 360 MHz secondary side rectification Frequency and harmonics.