Overview
The ADuM3211BRZ, produced by Analog Devices Inc., is a dual-channel digital isolator based on Analog Devices' iCoupler® technology. This component combines high-speed CMOS and monolithic transformer technology to provide superior performance compared to traditional optocoupler devices. The ADuM3211BRZ eliminates the design difficulties associated with optocouplers, such as uncertain current transfer ratios, nonlinear transfer functions, and temperature and lifetime effects. It operates with 3.3 V or 5 V supply voltages on either side, enabling compatibility with lower voltage systems and voltage translation across the isolation barrier. The device is known for its low power consumption, using one-tenth to one-sixth the power of optocouplers at comparable signal data rates.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | VDD1, VDD2 | 3.0 | - | 5.5 | V |
| Quiescent Input Supply Current | IDD1 | 0.7 | 1.3 | 2.1 | mA |
| Quiescent Output Supply Current | IDD2 | 0.7 | 1.0 | 1.9 | mA |
| Dynamic Input Supply Current | IDDI(D) | - | 0.19 | - | mA/Mbps |
| Dynamic Output Supply Current | IDDO(D) | - | 0.05 | - | mA/Mbps |
| Propagation Delay | tPHL, tPLH | 15 | - | 55 | ns |
| Pulse Width Distortion | PWD | - | 5 | - | ns |
| Output Rise/Fall Time | tR/tF | - | 3.0 | - | ns |
| Common-Mode Transient Immunity | |CM| | 25 | - | 35 | kV/μs |
Key Features
- High-Speed Operation: Data rates up to 25 Mbps.
- Low Power Consumption: Consumes one-tenth to one-sixth the power of optocouplers at comparable signal data rates.
- Dual-Channel Isolation: Provides two independent isolation channels.
- Voltage Translation: Operates with 3.3 V or 5 V supply voltages on either side, enabling voltage translation across the isolation barrier.
- Enhanced System-Level ESD Reliability: Improved capability relative to system-level IEC 61000-4-x testing (ESD, burst, and surge).
- Automotive Grade Versions: Models like ADuM3210W and ADuM3211W are qualified for 125°C operation.
Applications
- Automotive Interfaces: Suitable for CAN, audio, and Ethernet interfaces.
- Industrial I/O: Used in various industrial control and monitoring systems.
- RS-232 / RS-422 / RS-485 / RS-562 Interfaces: Applicable in serial communication systems.
- Signal Line Protection and Isolation: Protects against high voltage transients and noise in signal lines.
- Medical and High-Reliability Systems: Due to its enhanced ESD reliability and isolation characteristics.
Q & A
- What is the ADuM3211BRZ used for?
The ADuM3211BRZ is a dual-channel digital isolator used to provide electrical isolation and data transfer between two isolated circuits, often in applications requiring high-speed data transfer and low power consumption.
- What are the key advantages of the ADuM3211BRZ over optocouplers?
The ADuM3211BRZ offers superior performance by eliminating uncertain current transfer ratios, nonlinear transfer functions, and temperature and lifetime effects associated with optocouplers. It also consumes significantly less power.
- What are the operating voltage ranges for the ADuM3211BRZ?
The ADuM3211BRZ operates with supply voltages of 3.3 V or 5 V on either side, allowing for voltage translation across the isolation barrier.
- What is the maximum data rate supported by the ADuM3211BRZ?
The ADuM3211BRZ supports data rates up to 25 Mbps.
- Does the ADuM3211BRZ have automotive-grade versions?
- What is the common-mode transient immunity of the ADuM3211BRZ?
The ADuM3211BRZ has a common-mode transient immunity of 25 to 35 kV/μs.
- How does the ADuM3211BRZ handle ESD and surge protection?
The ADuM3211BRZ has enhanced system-level ESD reliability and is capable of withstanding ESD, burst, and surge tests as per IEC 61000-4-x standards.
- What is the output rise/fall time of the ADuM3211BRZ?
The output rise/fall time of the ADuM3211BRZ is approximately 3.0 ns (10% to 90%).
- Can the ADuM3211BRZ be used in industrial control systems?
- What is the typical propagation delay of the ADuM3211BRZ?
The typical propagation delay of the ADuM3211BRZ is around 15 to 55 ns.
