Overview
The ADuM1446ARQZ is a micropower, quad-channel digital isolator produced by Analog Devices Inc. This device utilizes the iCoupler technology, which combines high-speed complementary metal oxide semiconductor (CMOS) and monolithic air core transformer technologies. This combination provides outstanding performance characteristics, surpassing those of traditional optocoupler devices. The ADuM1446ARQZ is designed for low power operation, high speed data transfer, and robust isolation, making it suitable for a variety of applications requiring reliable and efficient signal isolation.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|---|
| Input Threshold Logic High | VIH | 0.7 VDDx | V | |||
| Input Threshold Logic Low | VIL | 0.3 VDDx | V | |||
| Output Voltages Logic High | VOH | VDDx - 0.1 | 3.0 | V | IOUTx = -20 µA, VIx = VIxH | |
| Output Voltages Logic Low | VOL | 0.0 | 0.1 | V | IOUTx = 20 µA, VIx = VIxL | |
| Quiescent Current per Channel (Refresh Enabled) | IDDI (Q) | 2.6 | 3.3 | µA | ENX low, VDDx = 3.3 V | |
| Quiescent Current per Channel (Refresh Disabled) | IDDI (Q) | 0.05 | µA | ENX high, VDDx = 3.3 V | ||
| Dynamic Supply Current per Channel | IDDI (D) | 76 | µA/Mbps | |||
| Output Rise Time/Fall Time | tR/tF | 2 | ns | 10% to 90% | ||
| Common-Mode Transient Immunity | |CM| | 25 | kV/µs | VIx = VDDx, VCM = 1000 V, transient magnitude = 800 V | ||
| Refresh Rate | fr | 14 | kbps | |||
| Operating Temperature Range | -40 | 125 | °C | |||
| Isolation Voltage | 2.5 kV | V |
Key Features
- Ultralow Power Operation: The device operates with quiescent currents as low as 0.3 µA per channel when refresh is disabled and 5.6 µA per channel when refresh is enabled.
- High Speed Data Transfer: Supports data rates up to 2 Mbps (NRZ).
- High Temperature Operation: Can operate in temperatures up to 125°C.
- High Common-Mode Transient Immunity: Greater than 25 kV/µs.
- Small Package Size: Available in 16-lead QSOP and 20-lead SSOP packages, saving significant board space compared to wide body SOIC packages.
- Safety and Regulatory Approvals: Meets UL 1577, CSA, and VDE regulatory standards.
- Input Glitch Filter: Protects against extraneous noise disturbances).
Applications
- Automotive Interfaces: Suitable for CAN, audio, and Ethernet interfaces in automotive systems).
- Industrial I/O: Used in industrial control systems and IO-Link applications).
- RS-232 / RS-422 / RS-485 / RS-562: Applicable in serial communication interfaces).
- Signal Line Protection: Provides isolation and protection in signal line applications).
- Controllers/Expanders: Used in various controller and expander systems requiring digital isolation).
Q & A
- What is the ADuM1446ARQZ used for?
The ADuM1446ARQZ is a quad-channel digital isolator used for isolating digital signals in various applications, including automotive, industrial, and communication systems. - What is the typical quiescent current per channel when refresh is enabled?
The typical quiescent current per channel is 5.6 µA when refresh is enabled). - What is the maximum data rate supported by the ADuM1446ARQZ?
The device supports data rates up to 2 Mbps (NRZ)). - What are the operating temperature ranges for the ADuM1446ARQZ?
The operating temperature range is from -40°C to 125°C). - What is the isolation voltage rating of the ADuM1446ARQZ?
The device has an isolation voltage rating of 2.5 kV). - Does the ADuM1446ARQZ meet any regulatory standards?
Yes, it meets UL 1577, CSA, and VDE regulatory standards). - What package options are available for the ADuM1446ARQZ?
The device is available in 16-lead QSOP and 20-lead SSOP packages). - How does the ADuM1446ARQZ protect against noise disturbances?
The device includes an input glitch filter to protect against extraneous noise disturbances). - What is the common-mode transient immunity of the ADuM1446ARQZ?
The common-mode transient immunity is greater than 25 kV/µs). - Can the ADuM1446ARQZ be used in high-speed applications?
Yes, it is suitable for high-speed applications with output rise and fall times of 2 ns (10% to 90%)).
