ADM2483BRWZ Alternatives, Symbol, Advantages and Disadvantages and Package
23 February 2024
Ⅱ. Technical parameters of ADM2483BRWZ
Ⅲ. ADM2483BRWZ symbol, footprint and pin configuration
Ⅳ. Circuit description of ADM2483BRWZ
Ⅴ. What are the advantages and disadvantages of ADM2483BRWZ?
Ⅵ. Dimensions and package of ADM2483BRWZ
Ⅷ. What are the limitations of ADM2483BRWZ in terms of communication protocol?
ADM2483BRWZ is a high-speed full-duplex isolated RS-485 or RS-422 communication interface integrated circuit produced by Analog Devices. This article will introduce you to the relevant information of ADM2483BRWZ. After understanding its characteristics and parameters, I believe you will have a deeper understanding of this chip and can better apply it to actual projects.
ADM2483BRWZ is an isolated RS-485 chip produced by ADI. It integrates a three-channel isolator internally, and its function is equivalent to replacing three 6N137 and one RS-485 chip. This chip uses ADI's iCoupler technology to integrate a three-channel isolator, a three-state differential line driver and a differential input receiver into a single package. On the logic side, the chip can be powered by 5V or 3V supplies, while on the bus side it only uses 5V supplies.
The ADM2483BRWZ is slew limited to reduce reflections from improperly terminated transmission lines. Controlled slew rate limits data rate to 500kbps. The input impedance of the device is 96 kΩ, allowing up to 256 transceivers on the bus. The driver differential outputs and receiver differential inputs are connected internally to form differential input or output ports.
Alternatives and equivalents:
• The mounting method of ADM2483BRWZ is SMD or SMT.
• ADM2483BRWZ has 3 channels.
• Its propagation delay time is 620 ns.
• Its data rate is 500 kb/s.
• Its operating temperature is -40°C to 85°C.
• Its power supply voltage is 2.7V to 5.5V.
• Its isolation voltage is 2500Vrms.
• The manufacturer of the ADM2483BRWZ is Analog Devices Inc.
• ADM2483BRWZ belongs to the category of digital isolators.
• ADM2483BRWZ has 16 pins and comes in SOIC-16 package and tube packaging.
• The operating supply current of ADM2483BRWZ is 2.5mA, and its operating supply voltage is 5V.
The above pictures are the symbol, footprint and pin configuration of ADM2483BRWZ. Among them, ADM2483BRWZ has a total of 16 pins, whose names and descriptions are as follows.
Pin 1 (VDD1): Power supply (logic side)
Pin 2 (GND1): Ground (logic side)
Pin 3 (RxD): Receiver output data. When enabled, if (A-B)≥-30mV, then RxD=high. If (A-B)≤-200mV, then RxD＝low. This is a tristate output when the receiver is disabled, that is, when RE’ is driven high.
Pin 4 (RE’): Receiver enable input. This is an active-low input. Driving this input low enables the receiver, and driving it high disables the receiver.
Pin 5 (DE): Driver enable input. Driving the input high enables the driver, and driving it low disables the driver.
Pin 6 (TxD): Transmit data input. Data to be transmitted by the driver is applied to this input.
Pin 7 (PV): Power_valid. Used during power-up and power-down.
Pin 8 (GND1): Ground (logic side)
Pin 9 (GND2): Ground (bus side).
Pin 10 (NC): No connect.
Pin 11 (NC): No connect.
Pin 12 (A): Noninverting driver output/receiver input. When the driver is disables, or when VDD1 or VDD2 is powered down, Pin A is put into a high impedance state to avoid overloading the bus.
Pin 13 (B): Inverting driver output/receiver input. When the driver is disabled, or when VDD1 or VDD2 is powered down, Pin B is put into a high impedance state to avoid overloading the bus.
Pin 14 (NC): No connect.
Pin 15 (GND2): Ground (bus side).
Pin 16 (VDD2): Power supply (bus side).
Taking the ADM2483 as an example, in the ADM2483, electrical isolation is implemented on the logic side of the interface. Therefore, the part has two main parts: the digital isolation part and the transceiver part. The driver input and data enable signals are applied to the TxD and DE pins respectively and are referenced to logic ground (GND1), coupled through the isolation barrier, to appear in the transceiver section referenced to isolated ground (GND2). Similarly, the receiver output, referenced to isolated ground in the transceiver section, is coupled through the isolation barrier to appear on the RxD pin referenced to logic ground.
1. Advantages of ADM2483BRWZ
(1) Easy to use: ADM2483BRWZ interface is simple and easy to use. Through the use of ADM2483BRWZ, the design and debugging process of communication circuits can be greatly simplified, thereby reducing development time and cost.
(2) Supports multiple operating modes: ADM2483BRWZ supports multiple operating modes, including read mode, write mode, and command mode. Since it is extremely flexible, we can choose according to the actual needs to meet a variety of different application scenarios.
(3) High-speed data transmission: The ADM2483BRWZ has a common mode rejection ratio (CMRR) of up to 2,500 V/μs and a differential mode rejection ratio (DMRR) of 1,000 V/μs, which means that it is capable of effectively suppressing both common mode and differential mode interference for high-speed, high-precision signal transmission.
(4) Integrated electrical data isolation: The ADM2483BRWZ uses iCoupler technology for isolated transmission of digital signals. This technique uses a chip-scale transformer winding to couple digital signals, thereby realizing magnetic transmission from one side of the barrier to the other. This isolation technique helps to improve the immunity and stability of the system.
2. Disadvantages of ADM2483BRWZ
(1) Higher power consumption: The power consumption of the ADM2483BRWZ may be a limiting factor for devices that rely on battery power or require long periods of uninterrupted operation, such as portable communication devices, remote sensor networks, or certain embedded systems.
(2) Limited data transmission distance: It has a limited data transmission distance and may not be able to meet application scenarios that require long-distance transmission. This means that data integrity and stability may be compromised in situations beyond its effective transmission range.
(3) Limited number of nodes: The ADM2483BRWZ's bus supports up to 256 nodes. For application scenarios where more nodes need to be connected, we may need to consider other communication devices with greater bus capacity, or use multiple ADM2483BRWZ devices to achieve expansion.
The ADM2483BRWZ has a length of 10.5 mm, a width of 7.6 mm, and a height of 2.35 mm. Among them, it has 16 pins and is packaged in SOIC-16 and tube.
First, we need to provide the correct power supply for the ADM2483BRWZ. It usually requires a 3.3V or 5V power supply, so we have to make sure that the power supply provided matches the chip specifications. Next, we connect the ADM2483BRWZ to the system. It is primarily used to provide isolation between two electrical grounds. We need to connect it to the data transmission lines and make sure the connections are accurate. This typically involves properly connecting TX+, TX-, RX+, and RX- to the appropriate lines in the system. Then, depending on the requirements of our application, we need to configure the ADM2483BRWZ to support the desired communication protocol. By setting the control pins of the chip, we can select different modes and rates. Then, test the functionality of the ADM2483BRWZ in our system. We need to make sure that the data is transmitted correctly and verify that the isolation function is working properly. By sending data and checking the response at the receiving end, we can verify the accuracy of the data transmission. In addition, we can use an oscilloscope or logic analyzer to check the waveforms and timing of the signals to make sure they are at the correct time and level. Finally, before integrating the ADM2483BRWZ into the final product, we must ensure that the design complies with applicable safety standards and regulations, with particular attention to safety and reliability requirements in industrial environments.
ADM2483BRWZ is an RS-485 transceiver. The limitations of its communication protocol are mainly reflected in the data transmission rate and number of nodes. According to its specifications, the ADM2483BRWZ operates at a data transfer rate of 500kbps, indicating potential unsuitability for communication tasks demanding higher data rates. In addition, the ADM2483BRWZ's bus supports up to 256 nodes. If more nodes need to be connected, we may need to consider other more suitable devices. Besides the constraints on data transfer rate and node count, the communication protocol of ADM2483BRWZ could impose additional limitations, including those related to bus length and communication distance.
Frequently Asked Questions
1. What is the purpose of the ADM2483BRWZ?
It is used for transmitting and receiving data over long distances in industrial applications, where noise immunity and robustness are critical.
2. What is the replacement and equivalent of ADM2483BRWZ?
You can replace the ADM2483BRWZ with ADM2483BRW, ADM2483BRW-REEL, or ADM2483BRWZ-REEL.
3. What are some typical applications for the ADM2483BRWZ?
Typical applications include industrial automation, process control, motor control, and instrumentation systems where reliable long-distance communication is required.
