ADM2587EBRWZ Transceiver Pinout, Features, Application and Use
19 April 2024
Ⅱ. Pin diagram of ADM2587EBRWZ
Ⅲ. Main features of ADM2587EBRWZ
Ⅳ. Typical applications of ADM2587EBRWZ
Ⅴ. Instructions for use of ADM2587EBRWZ
Ⅵ. Power isolation and signal isolation of ADM2587EBRWZ
Ⅶ. How to use and configure ADM2587EBRWZ correctly?
The ADM2587EBRWZ is a high-speed isolated data transceiver manufactured by Analog Devices Inc. It uses advanced digital isolation technology to achieve high-speed, high-precision signal isolation. This module has many advantages such as low power consumption, high withstand voltage and high temperature stability, so it is suitable for various industrial application scenarios. In addition, the module also has the flexibility of multi-channel isolation and multiple communication interfaces to meet the needs of different applications. Whether in the fields of energy management, industrial automation or power system monitoring, the ADM2587EBRWZ can provide reliable signal isolation and protection for the system. Even in harsh working environments or high noise interference, the module can operate stably to ensure accurate signal transmission.
Alternatives and equivalents:
Compared with other RS-485 interface chips, ADM2587EBRWZ integrates magnetic isolation technology and DC/DC power supply, thus becoming a true single-chip RS-485 integrated chip, significantly reducing the PCB board area. The application circuit of ADM2587EBRWZ is shown in the figure above, but please note that this circuit is for reference only. In practical applications, especially when encountering special application requirements, in order to ensure the safety of equipment and systems, we can choose to take additional protection measures, such as using TVS (transient voltage suppressor) and other components.
• Thermal shutdown protection
• Operating voltage: 5 V or 3.3V
• ADM2587E data rate: 500 kbps
• High common-mode transient immunity: >25 kV/μs
• Open and short circuit fault protected receiver inputs
• isoPower™ integrated isolated DC/DC converter
• The bus supports connections to up to 256 nodes.
• RS485 input/output pins provide ±15 kV ESD protection.
• Complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E) standards
• Isolated RS-485/RS-422 transceiver configurable for half- or full-duplex
The following figure show typical applications of the ADM2587EBRWZ in half duplex and full duplex RS-485 network configurations. Up to 256 transceivers can be connected to the RS-485 bus. To minimize reflections, terminate the line at the receiving end in its characteristic impedance and keep stub lengths off the main line as short as possible. For half-duplex operation, this means that both ends of the line must be terminated because either end can be the receiving end.
Follow the guidelines below to properly use the ADM2587EBRWZ.
1. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards.
2. This isolator is designed for fundamental electrical isolation within specified safety limits. Ensuring the integrity of safety data requires the utilization of protective circuits.
3. It's advisable to install a 0.1 µF and a 0.01 µF decoupling capacitor between Pin 2 and Pin 1.
4. The recommended capacitor values are 0.1 µF and 10 µF for VISOOUT at Pin 11 and Pin 12 and VCC at Pin 8 and Pin 9.
5. It's suggested to install a 10 µF reservoir capacitor and a 0.1 µF decoupling capacitor between Pin 12 and Pin 11.
6. It is recommended to connect Pin 11 and Pin 14 together through one ferrite bead to PCB ground.
7. It is recommended that a 0.1 µF and a 0.01 µF decoupling capacitor be fitted between Pin 19 and Pin 20.
8. The ADM2587EBRWZ component's dc-to-dc converter section needs to function at an exceptionally high frequency to facilitate efficient power transmission via compact transformers.
1. Power isolation
The power isolation in the ADM2587EBRWZ is achieved through the integration of an isoPower isolated DC-to-DC converter. This converter section operates based on principles commonly found in modern power supplies. It is a secondary side controller architecture with isolated pulse-width modulation (PWM) feedback. VCC power is supplied to an oscillating circuit that switches current into a chip-scale air core transformer. Power transferred to the secondary side is rectified and regulated to 3.3 V. The secondary (VISO) side controller regulates the output by creating a PWM control signal that is sent to the primary (VCC) side by a dedicated iCoupler data channel. The PWM modulates the oscillator circuit to control the power being sent to the secondary side. Feedback allows for significantly higher power and efficiency.
2. Signal isolation
Signal isolation in the ADM2587EBRWZ is realized on the logic side of the interface. This is accomplished through a combination of a digital isolation section and a transceiver section, as illustrated in the figure. Data applied to the TxD and DE pins and referenced to logic ground (GND1) are coupled across an isolation barrier to appear at the transceiver section referenced to isolated ground (GND2). Similarly, the single-ended receiver output signal, referenced to isolated ground in the transceiver section, is coupled across the isolation barrier to appear at the RXD pin referenced to logic ground.
We can follow the following principles:
1. Understand the basic specifications and features: First, we need to be familiar with the basic specifications and features of the ADM2587EBRWZ, including its signal and power isolation functions, ±15 kV ESD protection functions, and features suitable for high-speed communication applications.
2. Determine the working mode: According to actual needs, determine the working mode of ADM2587EBRWZ, including data transmission rate, isolation voltage, etc. In the application, we select the appropriate working mode according to the working conditions and environment of the device to achieve the best performance and stability.
3. Interface compatibility: Consider the interface compatibility with other devices to ensure the interconnection and interoperability of the devices. When designing the PCB layout, we try to follow the recommended layout in the data sheet to reduce interference and reflections in signal transmission.
4. Avoid overheating: Be careful to avoid overheating, so as not to affect the performance and life of the device. We need to make sure that the operating temperature of ADM2587EBRWZ is within its specified range during operation.
5. Electromagnetic compatibility (EMC) protection: We take appropriate electromagnetic compatibility (EMC) protection measures, such as using shields, filters, etc., to reduce the impact of external electromagnetic interference on the ADM2587EBRWZ.
6. Follow the data manual: During configuration and use, we always follow the data manual of ADM2587EBRWZ. The data sheet contains detailed information on operating mode selection, pin configuration, power supply, etc.
7. Testing and verification: After completing the configuration, we fully test and verify it to ensure that the ADM2587EBRWZ works properly in the application and meets the performance requirements.
Frequently Asked Questions
1. What is transceiver used for?
Transceivers are mechanical devices that combine a radio transmitter and a radio receiver. It can both transmit and receive radio waves for communication purposes. The transceiver is part of the network input card in a local area network. It can both send and receive messages over the network wire.
2. What is the package type of the ADM2587EBRWZ?
The ADM2587EBRWZ is available in a small outline wide-body (SOIC_WB) package, which enhances its suitability for space-constrained industrial designs.
3. What is the replacement and equivalent of ADM2587EBRWZ?
You can replace the ADM2587EBRWZ with ADM2582EBRWZ, ADM2582EBRWZ-REEL7 or ADM2587EBRWZ-REEL7.
4. How does the ADM2587EBRWZ achieve isolation?
The ADM2587EBRWZ utilizes a proprietary iCoupler® technology from Analog Devices, which employs high-frequency transformer coupling to provide isolation between the input and output sides of the device.
