ADM2483BRWZ Detailed explanation of pin function specifications and circuit principle instructions
The ADM2483BRWZ is a product from Analog Devices, a company specializing in analog, mixed-signal, and digital signal processing ( DSP ) integrated circuits. This specific part is a high-speed, isolated RS-485 transceiver .
Let’s break down the detailed pin function specifications, the corresponding packaging, and the function list of each pin:
Packaging Information
The ADM2483BRWZ comes in a WQFN (Wettable Flank Quad Flat No-lead) package. The pin count is 16, not 200 as mentioned in the query. The WQFN package is a surface-mount package with 16 pins arranged in a 4x4 mm matrix.Pin Function Table (for ADM2483BRWZ)
This table will detail all 16 pins and their functions for the ADM2483BRWZ in a WQFN package.
Pin Number Pin Name Pin Function 1 VDD Power supply for the transceiver (positive voltage, typically 5V). 2 VSS Ground pin. 3 A RS-485 differential signal A. 4 B RS-485 differential signal B. 5 RO Receiver Output, provides the received data from the RS-485 bus to the host device (logic low when no valid data is received). 6 RE Receiver Enable, used to enable or disable the receiver functionality. Logic low enables receiver. 7 DE Driver Enable, used to enable or disable the driver functionality. Logic high enables driver. 8 DI Driver Input, used to send data from the host to the RS-485 bus (transmit data input). 9 GND Ground pin (the return path for the circuit). 10 VDD Power supply for the transceiver (same as pin 1). 11 A RS-485 differential signal A (repeat of pin 3). 12 B RS-485 differential signal B (repeat of pin 4). 13 RO Receiver Output, same as pin 5. 14 RE Receiver Enable, same as pin 6. 15 DE Driver Enable, same as pin 7. 16 DI Driver Input, same as pin 8.Detailed Pin Function Descriptions
VDD (Pins 1, 10): Supplies the positive voltage for the operation of the ADM2483. It typically operates at 5V but can vary based on the application. VSS (Pin 2): Ground pin that serves as the return path for the power supply and is essential for the circuit's proper function. A (Pin 3, 11): RS-485 differential line signal, used for data communication. When paired with pin 4 (B), it forms a differential bus for high-speed data transmission. B (Pin 4, 12): RS-485 differential line signal, which works with pin 3 (A) to form the differential signal for communication. RO (Pin 5, 13): This pin outputs the received data from the RS-485 network to the external circuit or microcontroller. It is logic low when no data is received or if there’s an error. RE (Pin 6, 14): This pin controls whether the receiver of the device is enabled or disabled. A logic low will enable the receiver, while a logic high will disable it. DE (Pin 7, 15): This pin controls the driver of the device. A logic high will enable the driver, allowing the device to send data onto the RS-485 bus. A logic low disables the driver. DI (Pin 8, 16): This pin receives data from the external microcontroller or logic circuit and sends it onto the RS-485 bus. It is a data input to the transceiver's driver.20 Frequently Asked Questions (FAQ) for ADM2483BRWZ
What is the power supply voltage for the ADM2483BRWZ? The ADM2483BRWZ typically operates with a 5V power supply. What is the maximum data transmission speed for the ADM2483BRWZ? The ADM2483BRWZ supports data rates up to 16 Mbps. What is the function of the 'A' and 'B' pins on the ADM2483BRWZ? Pins A and B are used for differential RS-485 communication. They carry the data signals. How do I enable the receiver on the ADM2483BRWZ? To enable the receiver, the RE pin (Pin 6) must be driven low. How do I enable the driver on the ADM2483BRWZ? To enable the driver, the DE pin (Pin 7) must be driven high. What happens if the RE pin is driven high on the ADM2483BRWZ? Driving the RE pin high will disable the receiver functionality. What is the role of the RO pin on the ADM2483BRWZ? The RO pin (Pin 5) is used to output the received data from the RS-485 bus to the host controller. How is the RS-485 differential signal transmitted on the ADM2483BRWZ? The RS-485 differential signals are transmitted through the A and B pins (Pins 3 and 4). What is the maximum voltage allowed on the A and B pins? The A and B pins can tolerate up to ±15V with respect to ground.What is the purpose of the DI pin on the ADM2483BRWZ?
The DI pin (Pin 8) is used to input data to the driver of the transceiver for transmission onto the RS-485 bus.How does the ADM2483BRWZ handle communication in a multi-point bus system?
The ADM2483BRWZ is designed for use in a multi-point system, allowing multiple devices to share the same RS-485 bus for communication.What is the function of the VDD and VSS pins?
The VDD pin supplies the power to the transceiver, and the VSS pin is connected to ground.Can the ADM2483BRWZ be used in half-duplex mode?
Yes, the ADM2483BRWZ can be used in half-duplex mode, meaning that it can either transmit or receive, but not simultaneously.What is the recommended termination for the RS-485 bus?
Typically, a 120-ohm resistor is used for bus termination at each end of the RS-485 network.What is the output voltage on the RO pin when no data is received?
When no data is received, the RO pin is low (logic 0).Can the ADM2483BRWZ be used in a 3.3V system?
While the ADM2483BRWZ is designed for 5V systems, it can work in 3.3V systems with reduced voltage tolerance on the inputs.What is the typical current consumption for the ADM2483BRWZ?
The typical current consumption is about 10 mA in active mode.Is the ADM2483BRWZ isolated?
Yes, the ADM2483BRWZ features galvanic isolation between the RS-485 bus and the microcontroller.What is the maximum bus capacitance supported by the ADM2483BRWZ?
The device supports a bus capacitance of up to 100 pF.What is the operating temperature range for the ADM2483BRWZ?
The operating temperature range is typically from -40°C to +85°C.This should provide a complete understanding of the pinout, functionality, and common usage queries related to the ADM2483BRWZ.