Overview
The ADuM3211WARZ is a dual-channel digital isolator produced by Analog Devices Inc., leveraging the company's iCoupler® technology. This component combines high-speed CMOS and monolithic transformer technology to provide superior performance compared to traditional optocouplers. The ADuM3211WARZ eliminates the use of LEDs and photodiodes, thereby avoiding issues such as uncertain current transfer ratios, nonlinear transfer functions, and temperature and lifetime effects associated with optocouplers. It operates with supply voltages of 3.3 V or 5 V on either side, enabling compatibility with lower voltage systems and voltage translation across the isolation barrier.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions |
|---|---|---|---|---|---|---|
| Data Rate | - | 1 | - | 25 | Mbps | Within PWD limit |
| Propagation Delay (tPHL, tPLH) | - | 15 | 55 | 55 | ns | 50% input to 50% output |
| Pulse Width Distortion (PWD) | - | 6 | 4 | - | ns | |tPLH − tPHL| |
| Change vs. Temperature | - | 6 | 5 | - | ps/°C | - |
| Pulse Width (PW) | - | 1000 | 33 | - | ns | Within PWD limit |
| Propagation Delay Skew (tPSK) | - | 29 | 22 | - | ns | Between any two units |
| Channel Matching Codirectional (tPSKCD) | - | 5 | 3 | - | ns | - |
| Channel Matching Opposing Directional (tPSKOD) | - | 29 | 20 | - | ns | - |
| Output Rise/Fall Time (tR/tF) | - | 3.0 | 3.0 | - | ns | 10% to 90% |
| Supply Current (IDD1) | - | 0.7 | 1.3 | 2.0 | mA | - |
| Supply Current (IDD2) | - | 0.8 | 1.6 | 2.4 | mA | - |
Key Features
- High-Speed Operation: Data rates up to 25 Mbps, ensuring high-speed data transfer across the isolation barrier.
- Low Power Consumption: Consumes one-tenth to one-sixth the power of optocouplers at comparable signal data rates.
- Voltage Translation: Operates with 3.3 V or 5 V supply voltages on either side, enabling voltage translation functionality.
- Stable Performance: Eliminates issues associated with optocouplers such as uncertain current transfer ratios and nonlinear transfer functions.
- Automotive Grade: The ADuM3211WARZ model is qualified for 125°C operation, making it suitable for automotive applications.
- Improved ESD, Burst, and Surge Capability: Enhanced circuit and layout changes provide increased capability relative to system-level IEC 61000-4-x testing.
Applications
- Industrial I/O: Suitable for industrial control systems and automation.
- Automotive Interfaces: Used in automotive systems such as CAN, audio, and Ethernet interfaces.
- Medical Devices: Can be used in medical devices requiring high isolation and low power consumption.
- Power Supplies and DC-DC Converters: Useful in power supply and DC-DC converter designs where isolation is critical.
- Communication Systems: Applicable in various communication systems including RS-232, RS-422, RS-485, and USB.
Q & A
- What is the ADuM3211WARZ used for?
The ADuM3211WARZ is a dual-channel digital isolator used to provide electrical isolation and data transfer between two isolated circuits.
- What are the key advantages of using iCoupler technology over optocouplers?
iCoupler technology eliminates issues such as uncertain current transfer ratios, nonlinear transfer functions, and temperature and lifetime effects associated with optocouplers. It also consumes significantly less power.
- What are the supported data rates for the ADuM3211WARZ?
The ADuM3211WARZ supports data rates up to 25 Mbps.
- What are the supply voltage ranges for the ADuM3211WARZ?
The ADuM3211WARZ operates with supply voltages ranging from 2.7 V to 3.6 V on one side and 4.5 V to 5.5 V on the other side.
- Is the ADuM3211WARZ suitable for automotive applications?
Yes, the ADuM3211WARZ is qualified for 125°C operation, making it suitable for automotive applications.
- How does the ADuM3211WARZ improve ESD, burst, and surge capability?
The ADuM3211WARZ includes enhanced circuit and layout changes that provide increased capability relative to system-level IEC 61000-4-x testing.
- What is the typical propagation delay for the ADuM3211WARZ?
The typical propagation delay (tPHL, tPLH) is 15 to 55 ns.
- What is the output rise/fall time for the ADuM3211WARZ?
The output rise/fall time (tR/tF) is 3.0 ns from 10% to 90%.
- How does the ADuM3211WARZ handle pulse width distortion?
The pulse width distortion (PWD) is typically 6 ns for the ADuM3211WARZ.
- What are some common applications of the ADuM3211WARZ?
Common applications include industrial I/O, automotive interfaces, medical devices, power supplies, and communication systems.
