The "ADM2486BRWZ" you mentioned is a product from Analog Devices, a company specializing in high-performance analog, mixed-signal, and digital signal processing solutions.
This specific part, the ADM2486BRWZ, is a RS-485/RS-422 transceiver designed to provide high-speed data communication over long distances.
Here’s a detailed explanation of the pin functions, packaging, and FAQ based on the ADM2486BRWZ:
1. Package:
The ADM2486BRWZ is available in a WZ (14-lead TSSOP) package.
2. Pin Function and Specifications:
The ADM2486BRWZ has 14 pins. Below is a detailed table of pin functions.
Pin Number Pin Name Pin Function 1 VCC Power Supply (5V) 2 GND Ground (0V) 3 RO Receiver Output (Logic Output) 4 RE (Receiver Enable) Active low enables receiver, high disables 5 DE (Driver Enable) Active high enables driver, low disables 6 DI Driver Input (Data Input to Transmit) 7 A Differential Input/Output (Non-inverting) 8 B Differential Input/Output (Inverting) 9 GND Ground 10 A Differential Input/Output (Non-inverting) 11 B Differential Input/Output (Inverting) 12 RO Receiver Output (Logic Output) 13 VCC Power Supply (5V) 14 GND Ground3. Detailed Pin Functions:
VCC (Pin 1, Pin 13): The power supply pin, typically connected to a 5V voltage source. This powers the internal logic and the transceiver. GND (Pin 2, Pin 9, Pin 14): The ground reference pin for the device. It connects to the system's ground. RO (Pin 3, Pin 12): Receiver Output pin. This is a logic-level output, indicating whether the transceiver has received data. RE (Pin 4): Receiver Enable pin. This active-low signal enables the receiver section of the device when driven low, and disables the receiver when driven high. DE (Pin 5): Driver Enable pin. This active-high signal enables the driver section of the device when driven high, and disables the driver when driven low. DI (Pin 6): Driver Input pin. The data input to the driver section of the transceiver. The signal applied here is transmitted through the differential pair A and B. A (Pin 7, Pin 10): Differential signal output pin. This is the non-inverting side of the differential pair used for RS-485/RS-422 communication. B (Pin 8, Pin 11): Differential signal output pin. This is the inverting side of the differential pair used for RS-485/RS-422 communication.4. FAQs:
Q: What is the main function of the ADM2486BRWZ? A: The ADM2486BRWZ is a high-speed RS-485/RS-422 transceiver designed for reliable, long-distance data communication in industrial applications.
Q: How does the ADM2486BRWZ handle data transmission? A: It transmits data using differential signaling over twisted-pair cables via pins A and B, with the data input provided at the DI pin.
Q: How is the receiver enabled on the ADM2486BRWZ? A: The receiver is enabled by pulling the RE (Receiver Enable) pin low, which allows the receiver to output data on the RO pin.
Q: How is the driver enabled on the ADM2486BRWZ? A: The driver is enabled by pulling the DE (Driver Enable) pin high, allowing the device to transmit data from the DI pin over the differential lines A and B.
Q: What voltage is typically used for the VCC pin? A: The VCC pin is typically powered with a 5V supply.
Q: What is the purpose of the differential A and B pins? A: The A and B pins are used for differential data transmission in RS-485/RS-422 communication, providing noise immunity and long-distance data transfer.
Q: Can the ADM2486BRWZ be used in half-duplex communication? A: Yes, the ADM2486BRWZ supports half-duplex communication, where data transmission and reception occur on the same differential pair but at different times.
Q: How does the ADM2486BRWZ support noise immunity? A: The differential signaling between pins A and B provides immunity to electrical noise, making the device suitable for industrial environments with high electromagnetic interference.
Q: Is the ADM2486BRWZ suitable for high-speed communication? A: Yes, the ADM2486BRWZ is designed for high-speed communication with data rates of up to 16 Mbps.
Q: What type of logic level does the RO pin output? A: The RO pin outputs logic-level signals (typically 0V or 5V) corresponding to the received differential data.
Q: How can I disable the driver on the ADM2486BRWZ? A: To disable the driver, pull the DE pin low. This will prevent the device from driving the differential pair A and B.
Q: How does the RE pin affect the receiver functionality? A: The RE pin controls the receiver. When pulled low, it enables the receiver to output data on the RO pin. When high, the receiver is disabled.
Q: Can the ADM2486BRWZ be used in multi-point communication systems? A: Yes, the ADM2486BRWZ is designed for multi-point communication, making it ideal for RS-485 networks.
Q: What is the maximum cable length supported by the ADM2486BRWZ for RS-485 communication? A: The maximum cable length depends on the data rate, but typically it supports cable lengths up to 1200 meters (4000 feet) at lower speeds.
Q: How does the ADM2486BRWZ ensure signal integrity? A: The differential signaling between A and B ensures that the signals are robust against noise and capable of long-distance transmission.
Q: Is the ADM2486BRWZ suitable for use in noisy environments? A: Yes, its differential signaling ensures reliable operation in noisy industrial environments.
Q: What is the current consumption of the ADM2486BRWZ? A: The typical current consumption is around 4mA during operation, depending on the communication speed and other factors.
Q: Does the ADM2486BRWZ provide short-circuit protection? A: Yes, the device is designed with protection features for short circuits and other common electrical faults.
Q: Can I use the ADM2486BRWZ in 5V logic systems? A: Yes, the ADM2486BRWZ is designed for 5V logic systems, as it operates with a 5V supply.
Q: What is the power-down state of the ADM2486BRWZ? A: In power-down mode, the device reduces its current consumption to a very low level, typically below 1µA, while maintaining minimal functionality.
Conclusion:
The ADM2486BRWZ is a robust transceiver suitable for high-speed RS-485/RS-422 communication in industrial environments. With its detailed pinout and functionality, it ensures reliable data transfer over long distances.