Overview
The ADUM1281BRZ is a dual-channel digital isolator produced by Analog Devices Inc., utilizing the company's proprietary iCoupler technology. This component combines high-speed CMOS and monolithic air core transformer technology to provide superior performance characteristics compared to optocoupler devices and other integrated couplers. The ADUM1281BRZ is designed to offer high-speed data transfer, low propagation delay, and robust isolation, making it suitable for a variety of applications requiring reliable and high-performance digital isolation.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions |
|---|---|---|---|---|---|---|
| Propagation Delay | - | - | 23 ns | - | - | - |
| Pulse Width Distortion | - | - | 2 ns | - | - | C grade |
| Channel-to-Channel Matching | - | - | 5 ns | - | - | C grade |
| Data Rate | - | - | Up to 100 Mbps | - | - | - |
| Supply Voltage | VDDx | 3.135 V | - | 5.5 V | - | Industrial and automotive grades |
| Output Rise/Fall Time | tR/tF | - | - | 2.5 ns | 10% to 90% | |
| Input-to-Output Resistance | RI-O | 10^13 Ω | - | - | - | - |
| Input-to-Output Capacitance | CI-O | - | - | 2 pF | f = 1 MHz | |
| Input Capacitance | CI | - | - | 4.0 pF | - |
Key Features
- High-Speed Data Transfer: Supports data rates up to 100 Mbps.
- Low Propagation Delay: Propagation delay of 23 ns and pulse width distortion of less than 2 ns for C grade.
- Robust Isolation: Provides 3 kV RMS isolation voltage.
- Voltage Translation: Compatible with supply voltages ranging from 3.135 V to 5.5 V, enabling voltage translation across the isolation barrier.
- Refresh Feature: Ensures dc correctness in the absence of input logic transitions, with default high or low output depending on the model.
- Compact Package: Available in an 8-SOIC package.
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: Applicable in medical devices requiring high isolation and reliability.
- Power Supply and Motor Control: Used in power supply and motor control systems where isolation is critical.
- Communication Systems: Employed in various communication systems including RS-232, RS-422, and RS-485.
Q & A
- What is the ADUM1281BRZ used for? The ADUM1281BRZ is a dual-channel digital isolator used to provide high-speed data transfer and robust isolation in various applications.
- What is the propagation delay of the ADUM1281BRZ? The propagation delay is 23 ns.
- What are the supported data rates for the ADUM1281BRZ? The component supports data rates up to 100 Mbps.
- What is the isolation voltage of the ADUM1281BRZ? The isolation voltage is 3 kV RMS.
- What are the supply voltage ranges for the ADUM1281BRZ? The supply voltage ranges from 3.135 V to 5.5 V for both industrial and automotive grades.
- Does the ADUM1281BRZ have a refresh feature? Yes, it has a patented refresh feature to ensure dc correctness in the absence of input logic transitions.
- What is the default output state of the ADUM1281BRZ when power is first applied? The ADUM1281 has a default high output when power is first applied or not yet applied to the input side.
- In what package is the ADUM1281BRZ available? It is available in an 8-SOIC package.
- What are some common applications of the ADUM1281BRZ? Common applications include industrial I/O, automotive interfaces, medical devices, power supply and motor control, and communication systems.
- What is the input-to-output capacitance of the ADUM1281BRZ? The input-to-output capacitance is 2 pF at 1 MHz).
