Overview
The ADuM1245ARZ is a micropower, 2-channel digital isolator produced by Analog Devices Inc. It is based on the company's iCoupler technology, which combines high-speed complementary metal oxide semiconductor (CMOS) and monolithic air core transformer technologies. This component is designed to provide superior performance characteristics compared to traditional optocoupler devices. The ADuM1245ARZ is available in both 20-lead SSOP and 8-lead SOIC packages, offering 3.75 kV reinforced isolation and 3 kV basic isolation, respectively. It meets various regulatory requirements, including UL and CSA standards.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|---|
| Quiescent Current per Channel (Refresh Enabled) | IDDI (Q) | - | 5.6 | 10 | μA | ENx = 0, VDDx = 3.3 V |
| Quiescent Current per Channel (Refresh Disabled) | IDDI (Q) | - | 0.3 | 1 | μA | ENx = 1, VDDx = 3.3 V |
| Dynamic Supply Current per Channel | IDDI (D) | - | 148 | - | μA/Mbps | VDDx = 3.3 V |
| Output Rise Time/Fall Time | tR/tF | - | 2 | 10 | ns | 10% to 90% |
| Common-Mode Transient Immunity | |CM| | 25 | - | 40 | kV/μs | VIx = VDDx, VCM = 1000 V, transient magnitude = 800 V |
| Refresh Rate | fr | - | 14 | - | kbps | VDDx = VDD1 or VDD2 |
Key Features
- Ultralow Power Operation: The ADuM1245ARZ operates with very low quiescent current, typically 5.6 μA per channel with refresh enabled and 0.3 μA per channel with refresh disabled at 3.3 V supply.
- High-Speed Operation: Supports data rates up to several Mbps with low pulse width distortion (<8 ns).
- Input Glitch Filter: Protects against extraneous noise disturbances.
- Compact Packages: Available in 20-lead SSOP and 8-lead SOIC packages, providing space-saving solutions.
- Regulatory Compliance: Meets UL and CSA standards for isolation, ensuring safety and reliability.
- Low Supply Voltage: Operates with supplies as low as 2.25 V.
Applications
- General-Purpose Isolation: Suitable for various isolation needs in industrial, automotive, and medical devices.
- Low Power Serial Peripheral Interface (SPI): Ideal for low power SPI applications.
- 4-20mA Loop Process Control: Used in process control systems for accurate and reliable signal transmission.
- Automotive Interfaces: Compatible with CAN, audio, and Ethernet interfaces in automotive systems.
- Industrial I/O and IO-Link: Used in industrial automation for reliable and isolated communication.
Q & A
- What is the ADuM1245ARZ? The ADuM1245ARZ is a micropower, 2-channel digital isolator produced by Analog Devices Inc.
- What technology does it use? It uses Analog Devices' iCoupler technology, combining CMOS and monolithic air core transformer technologies.
- What are the available package options? It is available in 20-lead SSOP and 8-lead SOIC packages.
- What is the isolation voltage rating? The 20-lead SSOP package offers 3.75 kV reinforced isolation, and the 8-lead SOIC package offers 3 kV basic isolation.
- What are the typical quiescent current values? With refresh enabled, it is typically 5.6 μA per channel at 3.3 V, and with refresh disabled, it is typically 0.3 μA per channel.
- What is the dynamic supply current per channel? It is typically 148 μA/Mbps at 3.3 V supply.
- What is the output rise and fall time? It is typically 2 ns to 10 ns (10% to 90%).
- What is the common-mode transient immunity? It is 25 kV/μs to 40 kV/μs.
- What are some common applications of the ADuM1245ARZ? It is used in general-purpose isolation, low power SPI, 4-20mA loop process control, automotive interfaces, and industrial I/O and IO-Link.
- Does it meet any regulatory standards? Yes, it meets UL and CSA standards for isolation.
