ADUM1201BRZ-RL7 Alternatives, Specifications, Application and More
03 April 2024
Ⅰ. Overview of ADUM1201BRZ-RL7
Ⅱ. Specifications of ADUM1201BRZ-RL7
Ⅲ. Propagation delay-related parameters
Ⅳ. Application of ADUM1201BRZ-RL7
Ⅴ. How to evaluate the performance of ADUM1201BRZ-RL7?
Ⅵ. Functional block diagram of ADUM1201BRZ-RL7
Ⅶ. PCB layout of ADUM1201BRZ-RL7
Ⅷ. What should we pay attention to when using ADUM1201BRZ-RL7?
ADUM1201BRZ-RL7 is a digital isolator manufactured by Analog Devices Inc. It is widely used in motor drives, battery monitors, hybrid electric vehicles and digital fieldbus isolation. This article will focus on ADUM1201BRZ-RL7 and introduce its definition, specifications, application, PCB layout and usage precautions.
ADUM1201BRZ-RL7 is a dual channel digital isolator with 1/1 channel direct/unidirectional. This isolator combines high-speed CMOS and monolithic transformer technology to provide superior performance characteristics than alternatives such as optocouplers. By avoiding the use of LEDs and photodiodes, the ADUM1201BRZ-RL7's simple coupler digital interface and stable performance characteristics eliminate typical optocoupler issues regarding uncertain current transfer ratios, nonlinear transfer functions, and temperature and lifetime effects. Additionally, the ADUM1201BRZ-RL7 isolator provides two independent channels of isolation with a variety of channel configurations and data rates. The two parts operate on supply voltages ranging from 2.7V to 5.5V on either side, providing compatibility with lower voltage systems and enabling voltage translation capabilities across the isolation barrier.
Alternative models:
• Part Status: Active
• Data Rate: 25 Mb/s
• Package / Case: SOIC-8
• Packaging: Tape and Reel
• Pulse Width: 100 ns
• Supply Voltage: 2.7V ~ 5.5V
• Operating Supply Current: 6.3 mA
• Operating Temperature: -40°C ~ 105°C
• Propagation Delay Time: 50 ns
• Pin Count: 8
• Mounting Style: SMD/SMT
• Number of Channels: 2 Channels
• Manufacturer: Analog Devices Inc.
• Technology: Magnetic Coupling
• Product Category: Digital Isolators
Propagation delay is a parameter that describes the time it takes a logic signal to propagate through a component. The propagation delay to a logic low output can differ from the propagation delay to a logic high output.
Pulse width distortion represents the largest variance between these two propagation delay values, serving as a measure of the fidelity with which the timing of the input signal is maintained. Channel-to-channel matching refers to the maximum amount that the propagation delay differs between channels within a single ADUM1201BRZ-RL7 component. Propagation delay skew refers to the maximum amount that the propagation delay differs between multiple ADUM1201BRZ-RL7 components operating under the same conditions.
• Motor drive
• Transceiver isolation
• Battery monitor
• Multi-channel isolation
• Digital fieldbus isolation
• Hybrid electric vehicles
• SPI interface/data converter isolation
The isolation performance of ADUM1201BRZ-RL7 can be evaluated by the following indicators:
1. Current transfer characteristics: The ADUM1201BRZ-RL7 should exhibit excellent current transfer characteristics to ensure stable and efficient data flow during data transmission, both at the input and output sides. This is not only reflected in the speed of data transmission, but also in the accuracy and reliability of the data.
2. Temperature characteristics: The performance of ADUM1201BRZ-RL7 isolators should be stable over a wide range of temperatures to adapt to different operating environments.
3. Withstand voltage: This refers to the voltage that can be withstood between the inputs and outputs of the isolator in the event of an isolator failure. The ADUM1201BRZ-RL7 has a high withstand voltage to provide additional protection.
4. Isolation method: ADUM1201BRZ-RL7 adopts digital isolation technology, usually through the optical coupler or magnetic coupler to realize signal isolation, so as to ensure the electrical isolation between the input and output.
5. Isolation voltage: This refers to the maximum voltage that a digital isolator can withstand, usually measured in volts. The isolation voltage of the ADUM1201BRZ-RL7 is up to 3000Vrms, which means that it can safely isolate signals in high-voltage environments and protect the system from electrical noise and interference.
The ADUM1201BRZ-RL7 digital isolators require no external interface circuitry for the logic interfaces. Power supply bypassing is strongly recommended at the input and output supply pins. The capacitor value must be between 0.01 μF and 0.1 μF. The total lead length between both ends of the capacitor and the input power supply pin must not exceed 20 mm.
When using ADUM1201BRZ-RL7, we need to pay attention to the following matters:
1. Pin connection: When designing the board, please make sure that the pins of ADUM1201BRZ-RL7 are connected correctly. In particular, we need to pay attention to the pins VDD1 and VDD2. The VDD1 pin is responsible for providing power to one side of the isolator, while the VDD2 pin provides power to the other side. Both of these pins need to be properly connected to the power supply to ensure that the isolator will work properly. At the same time, in order to ensure the safety and stability of the circuit, we also need to ensure that the VDD1 and VDD2 pins are correctly connected to ground to prevent damage caused by power fluctuations or static electricity.
2. Supply voltage range: The supply voltage range of ADUM1201BRZ-RL7 is from 3 V to 5.5 V. In order to ensure that the chip can work properly, we must strictly control the supply voltage to avoid it exceeding this range. Too high a voltage may cause damage to the chip's internal components, while too low a voltage may not meet the chip's normal operating requirements. Therefore, when designing and installing the circuit board, we should choose the appropriate power supply module to ensure the stability and accuracy of the supply voltage.
3. Temperature range: The ADUM1201BRZ-RL7 has an operating temperature range of -40°C to +105°C. When designing and installing the board, we need to take into account the operating environment of the chip to ensure that it is within the normal operating temperature range. For application scenarios that may face extreme temperature conditions, we can take appropriate heat dissipation measures or insulation measures to keep the chip's temperature stable.
4. PCB layout: When designing the circuit board, we need to pay special attention to the relative positions of ADUM1201BRZ-RL7 and other circuit components. In order to avoid signal interference during transmission, we should place it in a suitable position on the circuit board to ensure a clear and direct signal path. At the same time, we should also consider the electromagnetic compatibility between the isolator and other components to avoid unnecessary electromagnetic radiation or mutual interference.
5. ESD protection: To protect the ADUM1201BRZ-RL7 from electrostatic discharge, please take appropriate protective measures when handling the chip. One common protective measure is the use of a grounding wrist strap. A grounding wrist strap connects the operator's body to the earth, effectively directing the static charge from the body into the ground, thus preventing static buildup and avoiding discharge when touching the chip. At the same time, we also recommend the use of anti-static mats. This mat has conductive properties that can connect the chips and other electronic components placed on it to the earth, forming a low-impedance electrostatic discharge channel to ensure electrostatic safety during operation.
6. Differential input/output: ADUM1201BRZ-RL7 adopts a differential input/output structure, which is characterized by strong anti-interference capability. When using it, please pay attention to the connection method and signal transmission quality of the differential input and output. Correct connection ensures stable signal transmission, while incorrect connection may result in degradation of signal quality or even communication failure. Therefore, when connecting the differential inputs and outputs, we should strictly follow the instructions in the product manual to ensure that each pin is correctly connected to the corresponding line.
Frequently Asked Questions
1. What is digital isolator?
Digital isolators are integrated devices used to isolate digital signals and transfer digital communication across an isolation barrier.
2. What is the operating temperature range of the ADUM1201BRZ-RL7?
The ADUM1201BRZ-RL7 has an operating temperature range of -40°C to +105°C, making it suitable for use in harsh industrial environments.
3. What is the primary function of the ADUM1201BRZ-RL7?
The primary function of the ADUM1201BRZ-RL7 is to provide galvanic isolation between two circuits while allowing digital signals to pass between them.
