ISO1050DUBR Characteristics, Application Fields, Layout Guidelines and More

31 January 2024 15


Ⅰ. What is a CAN transceiver?

Ⅱ. Overview of ISO1050DUBR

Ⅲ. Technical parameters of ISO1050DUBR

Ⅳ. Characteristics of ISO1050DUBR

Ⅴ. ISO1050DUBR symbol, footprint and pin configuration

Ⅵ. Application fields of ISO1050DUBR

Ⅶ. Layout guidelines of ISO1050DUBR

Ⅷ. How does ISO1050DUBR provide differential transmission capabilities?



The ISO1050DUBR is a CAN transceiver manufactured by Texas Instruments and is widely used in transportation, industrial automation, and sensors. We will discuss some key points related to ISO1050DUBR to give you a deeper understanding of this device. This article will cover the technical parameters, features, pin assignments, applications and layout of ISO1050DUBR. So let’s get started!



Ⅰ. What is a CAN transceiver?


A CAN transceiver is an electronic device used in a CAN bus network and is responsible for connecting the CAN bus and communication between nodes. CAN bus is a universal, serial-based, multicast local area network, mainly used in automated control systems and automotive electronic equipment, such as air conditioning control, driving assistance, engine management and automatic transmissions. The CAN transceiver is a key component that converts CAN bus signals into digital signals that can be read by nodes. It is also called a CAN transceiver module.



Ⅱ. Overview of ISO1050DUBR


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The ISO1050DUBR is a galvanically isolated CAN transceiver that conforms to the ISO11898-2 standard specification. The device features logic input and output buffers separated by a silicon oxide (SiO2) insulating barrier that provides current isolation up to 5000 VRMS for the ISO1050DW and up to 2500 VRMS for the ISO1050DUB. Used in conjunction with an isolated power supply, the device prevents noise currents on the data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuits.


As a CAN transceiver, the ISO1050DUBR device provides differential transmission capability to the bus and differential reception capability to the CAN controller at signal rates up to 1 megabit per second (Mbps). Designed for operation in particularly harsh environments, the device features -27V to 40V across the line, overvoltage and ground-loss protection, and thermal shutdown, as well as a -12V to 12V common-mode range.


Alternatives and equivalents:

ISO1050DUB

ISO1050DW

ISO1050DWR



Ⅲ. Technical parameters of ISO1050DUBR


• It has a power consumption of 200 mW.

• Its data rate is 1 Mb/s.

• Its power supply voltage is 3V to 5.5V.

• The mounting method is SMD or SMT.

• It has a propagation delay time of 74 ns.

• It has an operating supply current of 52mA.

• ISO1050DUBR belongs to the category of digital isolators.

• The manufacturer of the ISO1050DUBR is Texas Instruments.

• ISO1050DUBR has 8 pins and comes in SOP-8 package and tape and reel packaging.

• The ISO1050DUBR has a minimum operating temperature of -55°C and a maximum operating temperature of 105°C.



Ⅳ. Characteristics of ISO1050DUBR


ISO1050DUBR has the following characteristics:

• Low power consumption: The device greatly reduces energy consumption through optimized design and efficient energy management techniques, thus helping users save energy costs.

• High data rate: The ISO1050DUBR features a data transfer rate of up to 1 Mbps, which is suitable for applications that require fast data transmission.

• Wide temperature range: It has a wide operating temperature range. Whether in high or low temperature environments, this device is able to operate stably.

• High isolation performance: The ISO1050DUBR is capable of providing isolation voltages up to 5000 Vrms (per minute), enabling it to maintain excellent performance in high-voltage environments.



Ⅴ. ISO1050DUBR symbol, footprint and pin configuration


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The pictures above are the symbol, footprint and pin configuration of ISO1050DUBR. Among them, it has eight pins, whose names and functions are as follows.


Pin 1 (VCC1): Digital-side supply voltage (3 to 5.5V)

Pin 2 (RXD): CAN receive data output (LOW for dominant and HIGH for recessive bus states)

Pin 3 (TXD): CAN transmit data input (LOW for dominant and HIGH for recessive bus states)

Pin 4 (GND1): Digital-side ground connection

Pin 5 (GND2): Transceiver-side ground connection

Pin 6 (CANL): Low-level CAN bus line

Pin 7 (CANH): High-level CAN bus line

Pin 8 (VCC2): Transceiver-side supply voltage (5V)



Ⅵ. Application fields of ISO1050DUBR


ISO1050DUBR is usually used in the following fields:


• Telecommunications: Its integration with the telecommunications infrastructure ensures strong connectivity for fast and secure information exchange between individual nodes, thus contributing to the overall efficiency and resilience of the communications network.


• Industrial automation: ISO1050DUBR is used in industrial automation, control, sensor and drive systems. It helps to improve the overall efficiency, safety and accuracy of automation, control, sensor and drive systems.


• Medical: In ECG machines, monitors and medical imaging equipment, the ISO1050DUBR's high data transfer rate ensures fast and accurate transfer of medical data, thus providing doctors with an accurate diagnosis.


• Building and climate control (HVAC) automation security systems: Whether it's preventing unauthorized access, monitoring environmental parameters, or coordinating complex automated processes, this component is the cornerstone for designing and implementing state-of-the-art solutions that enhance the security and performance of modern building and HVAC systems.



Ⅶ. Layout guidelines of ISO1050DUBR


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A minimum of four layers is required to accomplish a low EMI PCB design (see figure). Layer stacking should be in the following order (top-to-bottom): high-speed signal layer, ground plane, power plane and low-frequency signal layer.


• Routing the high-speed traces on the top layer avoids the use of vias (and the introduction of their inductances) and allows for clean interconnects between the isolator and the transmitter and receiver circuits of the data link.

• Placing a solid ground plane next to the high-speed signal layer establishes controlled impedance for transmission line interconnects and provides an excellent low-inductance path for the return current flow.

• Placing the power plane next to the ground plane creates additional high-frequency bypass capacitance of approximately 100 pF/in².

• Routing the slower speed control signals on the bottom layer allows for greater flexibility as these signal links usually have margin to tolerate discontinuities such as vias.


lf an additional supply voltage plane or signal layer is needed, add a second power or ground plane system to the stack to keep it symmetrical. This makes the stack mechanically stable and prevents it from warping. Also the power and ground plane of each power system can be placed closer together, thus increasing the high-frequency bypass capacity significantly.



Ⅷ. How does ISO1050DUBR provide differential transmission capabilities?


The ISO1050DUBR provides data transfer capability through differential transmission. Differential transmission is a way to represent data by utilizing the voltage difference in two wires and is typically used for high-speed data transmission. In the ISO1050DUBR, the differential transmission capability is realized through its internal circuit design and signal processing.


The ISO1050DUBR transforms data into a differential signal for transmission on a bus, sending it through a pair of differential wires (typically two). Upon reception, the device converts the received differential signal into a single-ended signal and delivers it to the CAN controller. In this way, the ISO1050DUBR is able to provide high-speed, reliable data transmission while reducing electromagnetic interference and signal distortion.


In order to realize differential transmission, the ISO1050DUBR also requires certain signal processing capabilities. This includes techniques for encoding, decoding, driving and receiving signals. Through these techniques, it is able to handle high-speed data streams and ensure data integrity and accuracy.




Frequently Asked Questions


1. What is the ISO1050DUBR?


The ISO1050DUBR is an isolated Controller Area Network (CAN) transceiver, designed to provide signal isolation between CAN nodes in industrial and automotive applications.


2. What is the replacement and equivalent of ISO1050DUBR?


You can replace the ISO1050DUBR with ISO1050DUB, ISO1050DW or ISO1050DWR.


3. In what applications is the ISO1050DUBR commonly used?


The ISO1050DUBR is commonly used in applications where isolation is crucial, such as industrial automation, automotive systems, medical devices, and other environments where electrical noise and ground potential differences can be a concern.


4. What is use of CAN transceiver?


The CAN transceiver and controller make up the CAN node. A CAN transceiver is the interface between the controller and the CAN bus. The transceiver translates the logic level messages from the controller into the CAN differential scheme on the CANH and CANL pins of the CAN transceiver.




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