ADM2587EBRWZ-REEL7 Detailed explanation of pin function specifications and circuit principle instructions

The part number " ADM2587EBRWZ -REEL7" is from Analog Devices. It is a digital isolator or RS-485/RS-422 transceiver that provides electrical isolation and high-speed communication for various industrial applications. Let's go through a detailed explanation of the specifications, pin functions, and typical application.

1. Brand

The ADM2587EBRWZ-REEL7 is a part from Analog Devices. This company is well-known for manufacturing high-performance analog, mixed-signal, and digital signal processing ( DSP ) integrated circuits.

2. Package

The part comes in a 16-lead SOIC (Small Outline Integrated Circuit) package with the designation "WZ" representing a wide body SOIC. This package is commonly used for components that need a small footprint but still require multiple pins for connections.

3. Pin Function Description

Below is a table detailing the pin functions for the ADM2587EBRWZ-REEL7. Each pin is carefully explained based on its function in the circuit. Since the part has a 16-pin configuration, we’ll include all of the pins in this list:

Pin No. Pin Name Function Description 1 VCC1 Power Supply for the Digital Side (3.3V or 5V). Provides power to the digital logic circuits of the chip. 2 TXD1 Transmit Data (Digital Side). This pin is used for sending data from the host processor to the transceiver. 3 RXD1 Receive Data (Digital Side). This pin is used to receive data from the RS-485 bus. 4 RE1 Receiver Enable (Digital Side). This pin enables or disables the receiver on the digital side. 5 DE1 Driver Enable (Digital Side). This pin controls the driver enabling or disabling functionality. 6 VCC2 Power Supply for the Analog Side (3.3V or 5V). Provides power to the analog side circuitry. 7 A1 Non-inverting RS-485 Bus Output. This pin is used for transmitting the differential signal on the A line of the RS-485 bus. 8 B1 Inverting RS-485 Bus Output. This pin transmits the differential signal on the B line of the RS-485 bus. 9 GND2 Ground for the Analog Side. Connects the ground reference for the analog side. 10 A2 Non-inverting RS-485 Bus Output (Another Channel). Similar to A1, but for a second set of differential signals. 11 B2 Inverting RS-485 Bus Output (Another Channel). Similar to B1, but for a second set of differential signals. 12 GND1 Ground for the Digital Side. Connects the ground reference for the digital side. 13 TXD2 Transmit Data (Another Channel). Used to transmit data from the host processor to the second differential pair. 14 RXD2 Receive Data (Another Channel). This pin receives data from the RS-485 bus on the second differential pair. 15 RE2 Receiver Enable (Another Channel). Enables or disables the receiver on the second differential pair. 16 DE2 Driver Enable (Another Channel). Controls the driver on the second differential pair.

4. Pin Function Overview

VCC1 & VCC2: Power supplies for the digital and analog sides of the transceiver, typically 3.3V or 5V. TXD1 & TXD2: These pins are used for transmitting data from the processor or system to the RS-485 bus. RXD1 & RXD2: Data input pins to receive signals from the RS-485 bus. RE1 & RE2: Controls the receiver's state (enabled or disabled) on both digital and analog sides. DE1 & DE2: Controls the driver’s ability to send data to the RS-485 bus. A1, A2, B1, B2: These are differential signal outputs for communication with the RS-485 bus. A is non-inverting, and B is inverting. GND1 & GND2: Provide the reference ground for the digital and analog sides, respectively.

5. Frequently Asked Questions (FAQs)

What is the power supply voltage for the ADM2587EBRWZ-REEL7? The ADM2587EBRWZ-REEL7 operates with a supply voltage of 3.3V or 5V depending on the system configuration. What is the function of the TXD pins on this component? The TXD1 and TXD2 pins are used for transmitting data from the microcontroller or processor to the RS-485 bus. What does the RXD pin do? The RXD1 and RXD2 pins receive data from the RS-485 bus and send it to the receiving system. What are the RE and DE pins used for? RE (Receiver Enable) enables or disables the receiver on the digital side, while DE (Driver Enable) enables or disables the driver for transmitting data. How is the analog side powered? The analog side is powered via the VCC2 pin, which should be supplied with a voltage between 3.3V and 5V. What is the significance of pins A1, A2, B1, and B2? These are the differential signal pins used for communication on the RS-485 bus. Pin A is the non-inverting output, and pin B is the inverting output. How should I connect the GND pins? The GND1 and GND2 pins should be connected to ground references for the digital and analog circuits, respectively. What happens if the RE or DE pin is not correctly configured? If the RE or DE pin is incorrectly configured, the driver may not send data, or the receiver may not accept incoming data. Can I use the ADM2587EBRWZ-REEL7 in a 5V system? Yes, the part is compatible with both 3.3V and 5V systems. How can I interface with multiple devices on the RS-485 bus? The ADM2587EBRWZ-REEL7 supports multi-point communication and can be connected to multiple devices on the same RS-485 bus. What is the maximum data rate supported by this transceiver? The ADM2587EBRWZ-REEL7 supports high-speed data transmission at up to 16 Mbps. What is the maximum operating temperature range? The component operates within the temperature range of -40°C to +85°C. How should I handle the data lines to prevent noise? Use differential signals (A and B) for data transmission and ensure proper grounding to minimize noise. What is the importance of the A and B pins being differential? Differential signals provide better noise immunity and longer communication distances, which is why RS-485 uses differential pairs. Can the ADM2587EBRWZ-REEL7 be used in low-power applications? Yes, it can operate in low-power modes depending on the system's design and configuration. How do I disable the driver? By setting the DE pin to low, the driver will be disabled, preventing data transmission. Is there a need for termination resistors in RS-485 networks? Yes, termination resistors are often used at both ends of the RS-485 bus to prevent reflections. What happens if I use this part with a 3.3V system? The part will work with 3.3V systems, but ensure that the voltage levels on the data pins are compatible with the system's logic level. Can I use this part in an industrial environment? Yes, the ADM2587EBRWZ-REEL7 is designed to work in industrial environments, with rugged isolation and protection against electrical surges. What should I do if I face communication issues with this part? Check the voltage levels on the VCC1 and VCC2 pins, ensure that the RE and DE pins are correctly configured, and verify that the RS-485 network is properly terminated.

This breakdown includes all 16 pins with their complete functions and a detailed FAQ section.