Overview
The ADUM7440ARQZ-RL7 is a 4-channel digital isolator from Analog Devices Inc., part of their iCoupler series. This component utilizes magnetic coupling technology to provide high-speed, low-power isolation. It is designed to offer superior performance compared to traditional optocouplers and other integrated couplers. The ADUM7440ARQZ-RL7 is packaged in a compact 16-lead QSOP, which significantly reduces board space requirements while maintaining high isolation voltage and regulatory compliance.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|---|
| Isolation Voltage | Vrms | - | - | 1000 | Vrms | For 1 minute |
| Supply Voltage | VDDx | 3.0 | - | 5.5 | V | On either side |
| Supply Current (3V) | IDD1 | 1.5 | - | 8.25 | mA | Per channel at 25 Mbps |
| Supply Current (5V) | IDD1 | 2.25 | - | 11.5 | mA | Per channel at 25 Mbps |
| Data Rate | - | - | - | 25 | Mbps | NRZ |
| Logic High Input Threshold | VIH | 0.7 VDDx | - | - | V | - |
| Logic Low Input Threshold | VIL | 0.3 VDDx | - | - | V | - |
| Output Rise/Fall Time | tR/tF | - | - | 2.5 | ns | 10% to 90% |
| Common-Mode Transient Immunity | |CM| | - | - | 15 kV/μs | - | Transient magnitude = 800 V |
| Input Capacitance | CI | - | - | 4.0 | pF | From any input data pin to ground |
| Input-to-Output Resistance | RI-O | - | - | 1013 | Ω | - |
| Input-to-Output Capacitance | CI-O | - | - | 2 | pF | f = 1 MHz |
Key Features
- High-Speed Data Transfer: Up to 25 Mbps data rate (NRZ) for fast communication.
- Low Power Consumption: Consumes significantly less power compared to other isolators, with supply currents as low as 1.5 mA per channel at 3V and 2.25 mA per channel at 5V.
- High Isolation Voltage: 1000 Vrms isolation rating for 1 minute, meeting UL 1577 regulatory requirements.
- Compact Packaging: 16-lead QSOP package, reducing board space by approximately 70% compared to traditional 16-lead wide SOIC packages.
- High Common-Mode Transient Immunity: >15 kV/μs to protect against noise disturbances.
- Input Glitch Filter: Protects against extraneous noise disturbances.
- Wide Operating Temperature Range: Up to 105°C for high temperature operation.
Applications
- General-Purpose Isolation: Suitable for various isolation needs in digital systems.
- SPI Interface/Data Converter Isolation: Ideal for isolating SPI interfaces and data converters.
- RS-232/RS-422/RS-485 Transceivers: Used in serial communication interfaces for isolation.
- Industrial Field Bus Isolation: Applicable in industrial field bus systems for reliable data transmission.
Q & A
- What is the isolation voltage rating of the ADUM7440ARQZ-RL7?
The ADUM7440ARQZ-RL7 has a 1000 Vrms isolation voltage rating for 1 minute. - What is the maximum data rate supported by the ADUM7440ARQZ-RL7?
The ADUM7440ARQZ-RL7 supports up to 25 Mbps data rate (NRZ). - What is the typical supply current for the ADUM7440ARQZ-RL7 at 3V and 5V operation?
At 3V, the typical supply current is 1.5 mA per channel, and at 5V, it is 2.25 mA per channel. - What is the package type of the ADUM7440ARQZ-RL7?
The ADUM7440ARQZ-RL7 is packaged in a 16-lead QSOP. - What is the common-mode transient immunity of the ADUM7440ARQZ-RL7?
The common-mode transient immunity is >15 kV/μs. - Does the ADUM7440ARQZ-RL7 have any input glitch filter?
Yes, the ADUM7440ARQZ-RL7 has an input glitch filter to protect against extraneous noise disturbances. - What are the typical applications of the ADUM7440ARQZ-RL7?
The ADUM7440ARQZ-RL7 is used in general-purpose isolation, SPI interface/data converter isolation, RS-232/RS-422/RS-485 transceivers, and industrial field bus isolation. - What is the operating temperature range of the ADUM7440ARQZ-RL7?
The operating temperature range is up to 105°C. - Does the ADUM7440ARQZ-RL7 meet any regulatory approvals?
Yes, it meets UL 1577 regulatory requirements. - How does the ADUM7440ARQZ-RL7 compare to other isolators in terms of power consumption?
The ADUM7440ARQZ-RL7 consumes significantly less power compared to other isolators at comparable data rates.
